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3 Series vs. 4 Series BMW

Comparison between 3 Series and 4 Series BMW

1. Introduction

Engines start with the 420i, a well-rounded petrol that can achieve a claimed 47.9mpg and top out with the impressively quick 435d xDrive that's capable of 0-62mph in just 4.8 seconds. For those with an eco-conscience, the 420d represents a good compromise between performance and economy, offering a 0-62mph of 7.3 seconds and a claimed 59mpg. All models come with an eight-speed automatic gearbox as standard, a feature previously linked to a price hike. Step inside and it's business as usual for a modern BMW. The interior is much the same as the 3 Series with high-quality materials, a sensible layout and impressive build quality. Although it's a coupe, this is a genuine four-seater with enough head and legroom for all occupants. Boot space is also on par with the saloon, making the 4 Series a surprisingly practical choice for a coupe buyer. Characteristically, the 4 Series has been set up with a focus on driving enjoyment. Adaptive M Sport suspension is available as an extra, dropping the ride height by 10mm and offering electronically controlled dampers for optimized performance. When pushed to the limit, the 4 Series is a real driver's car with accurate steering and plenty of grip.

So what's the new 4 Series all about? Well essentially it's a coupe version of the 3 Series, although it now has a different name. BMW says it's made the change to reflect the fact that the 4 Series has its own identity, influenced by its wider, lower stance and longer wheelbase. It's available in three body shapes; coupe, convertible and gran coupe, with all models being rear-wheel drive and the option of xDrive four-wheel drive.

The 3 Series comes with a wide range of engines, the most economical being the 316d saloon which can achieve 68.9mpg. At the other end of the scale is the 326bhp 340i, a super-fast sports saloon that's capable of 0-62mph in 5.2 seconds. The 3 Series has always been known for its engaging drive and while the latest model has a more comfortable ride than previous versions, it's still more fun to drive than its rivals. Step inside and the first thing that strikes you is the quality of the interior. This is a car that feels well-built and the dashboard is logically arranged with a user-friendly infotainment system. There's plenty of room up front but taller passengers may feel a little cramped in the rear.

The 3 Series has always been BMW's best-selling model and it's not hard to see why. This is a small, executive saloon that comes with rear-wheel drive as standard, giving it an advantage over rivals such as the Audi A4 and Mercedes C-Class. The latest 3 Series is also available with four-wheel drive but purists will stick with the rear-wheel drive version, which remains the best-handling car in its class. There's also an estate version, which BMW calls the Touring, and a practical hatchback called the 3 Series Gran Turismo but these models are reviewed separately. (Lewin, 2021)

1.1. Overview of BMW 3 Series

The long-running coupe now becomes the 4 Series, with the 3 Series moniker being reserved solely for the saloon. The 3 Series badge has specifically always related to the saloon bodystyle with the Touring and Gran Turismo hatchback variants coming under the 3 Series umbrella despite being different cars in their own right. Evident in its name change, the new 4 Series has its own identity rather than just being a 3 Series with two less doors. This means potential 3 series buyers now have to seriously consider if they in fact want a 4 Series, which is no bad thing for BMW. The 4 Series still shares many parts with the 3 Series to keep production costs down. Bodyshop activities are now only differentiated at the point when the shell is finished - a shaded area at the top of the A-pillar shows where to cut the steel for the conversion to either 3 or 4 Series branding. The 4 Series offers a more stylish coupe bodystyle with a lower, wider and longer body. The wheelbase is identical to the 3 Series and so interior space is much the same. At the rear, the 4 Series is more comfortable for two adults though access to the back seats is more difficult than the 3 Series. The 4 Series is also available as a folding hard-top Convertible and Gran Coupe, the latter being a four-door which is essentially a 4 Series with extra headroom and rear passenger doors. The entire 4 Series range is aimed at a more premium market than the equivalent 3 Series. Although still a good car, the days have gone where a Coupe was the preferred bodystyle over a saloon. Buyers of upper medium segment cars are now far more likely to choose the SUV, hence the 3 Series GT and the existence of the X4 which could be considered as a high riding 4 Series.

Each new generation of 3 Series has brought marked gains in performance, but rarely at the expense of fuel economy. Historically, the 3 Series has offered the best fuel economy in its segment. Though this can no longer be said, the current-generation F30 3 Series still offers very good fuel economy, especially given its performance capabilities. The improved fuel economy and emissions data has made the current 3 Series more competitive in the fleet sales market. There are a wide range of bodystyles and engines available for the 3 Series, with the most dealers typically offering 70-80 different versions to choose from. As well as the saloon, a long-wheelbase version is also built exclusively for sale in the Chinese market.

1.2. Overview of BMW 4 Series

The 4 Series Convertible is 14mm longer and 36mm wider than the 3 Series and is slightly lower. It has an 11mm longer wheelbase and comes with the optional M Sport suspension as standard, but you can obtain it with BMW's xDrive all-wheel drive. The Convertible is 240kg heavier than the Coupe and has a 49/51% weight distribution. The roof can open in 20 seconds and will work at speeds up to 18km/h. The Convertible has similar engine options to the Coupe but adds a 420d xDrive as the only all-wheel drive 4 Series. (Xutai et al.2021) (Cheng et al., 2021)(Xutai et al.2021)

The Coupe is approximately 45kg heavier than the current E92 3 Series Coupe and has a 50/50 weight distribution. The roof is made of aluminum to reduce weight. The 4 Series will only come with a petrol engine, which makes sense due to differing markets. The 435i (renamed to 440i in 2016) is a N55 Twin Scroll Turbo 3.0L putting out 225kw and 400Nm with a 0-100km time of 5.1 seconds. The 428i is a N20 Twin Scroll Turbo 2.0L putting out 180kw and 350Nm with a 0-100km time of 6.1 seconds. The 420i is a N20 2.0L with 135kw and 270Nm with a 0-100km time of 7.3 seconds. The 420i has an optional 2.0L N47 diesel with 135kw and 380Nm using 4.7L/100km.

BMW 4 Series goes a bit further by offering better performance and more features. In 2014, BMW decided to loosen naming parsing meaning 4 door sedan is 3 Series and 4 Series gets Coupe/Convertible. The BMW 4 Series Coupe is 14mm longer, 14mm wider, and 67mm taller than the 3 Series. It has a 10mm longer wheelbase and sits 16mm lower. It comes with the optional M Sport brakes and adaptive M suspension as standard, but you can obtain it with BMW's xDrive all-wheel drive.

2. Exterior Design

The F30 3 series and F32 4 series are so named for their model codes corresponding to their chassis. The F32 sports coupe has a sleek profile, and it can be seen that the roof has a more defined curvature consistent with coupe styling. The F33 4 series convertible features a retractable hard top, allowing the car to retain a coupe-like profile when the top is up. Due to sharing the same model code, the F36 4 Series Gran Coupe is, in theory and name, a variation of the 4 Series. This is the most similar variation of a coupe and sedan when comparing the 4 Series to the 3 Series, as it carries virtually the same design cues and has a similar widened athletic appearance. This outlines the fact that the 4 Series is not trying to be a completely different car from the 3 Series, just a higher positioned and different variation of it. (Li et al.2022)

The 3 Series has been widened and has a much sportier appearance than its predecessors. The car's wide track and athletic lines along the hood give it a strong appearance, like a little brother trying to puff its chest to resemble its stronger older sibling. In comparison, the 4 Series' long, elegant hood and shorter tail give it a sporty and higher-status look, although the heavy front end practicality led to the car sharing the exact same dimensions as the compact 3 Series. Overall, the 4 Series has a more sophisticated and refined design to befit its higher price tag.

Sedans and coupes have separate style variations for different markets. This method is likely to create parallels in the lineup down the road. Ultimately, BMW's new 3 and 4 Series' appearances deviate more from each other than ever before. The 3 Series aims to be more aggressive, while the 4 Series has adopted an elegant, high-status look.

2.1. Differences in body styling

BMW's 3 and 4 series cater for different styles of buyer - one of them is a much more pragmatic purchase than the other. The differences in body styling in the 3 and 4 series is obvious as soon as you see the cars side by side. The similarities between the two are obvious, and there is no mistaking that these cars both share BMW's latest family styling cues. However, there's a more sloping roofline that's lower by 16mm at its highest point at the front of the 4 series, and it's this that creates a less upright and elongated profile than the 3 series. The 3 series wheelbase is 50mm longer than the 4 series, and this extra length between the front and rear wheels has enabled more cabin space in the saloon. Lastly, it should be noted that the 3 series is also available as a Touring, which is another attribute that makes the practicality of this model more favourable compared to the 4 series.

2.2. Variations in front grille design

The front grilles of the 3 and 4 Series are a marked differentiator between the two models, and one which has been the subject of significant criticism from a number of quarters. The 3 Series features a more horizontal design, with each of the Dual-Kidney grilles flowing into the corresponding headlight. A character line extends across the front of the car to a contoured bonnet. The 4 Series on the other hand showcases a more radical departure, with larger, more vertical grilles extending to the edge of the front apron. In comparison to the 3 Series, the character line extending from the grilles is higher on the bonnet and evolves into a separate line which runs along the bonnet itself. Since the reveal of the 4 Series Concept, opinions have been divided, to put it mildly. Memes have been rife across social media platforms mocking the design, with some comparing the 4 Series grill to a number of different objects including beaver teeth. It now transpires there was method in BMW's madness however, with the company recently having revealed this was intentional. Their goal was to provide a more distinctive identity separate from the 3 Series and the 4 Series has achieved exactly that. Whether customers like it is subjective, but there is no doubting that the new design approach has generated more talk and publicity than any other feature on the car.

2.3. Contrasting headlight and taillight designs

Both cars sport a unique and accomplished look. The 3 series has a solid, wide, more contemporary looking tail lights while the 4 series is much sharper and sleeker. The 4 series' tail lights resemble those of the new 5 and 7 series, and at first glance, it's quite difficult to tell the difference between the two. The design of the head and tail lights plays a major role in differentiating the two vehicles as the 3 and 4 series share the same platform and is perhaps the most obvious exterior difference between the two. This is especially important as it states that since the two cars are essentially the same, it gives potential 4 series buyers a chance to distinguish and elevate their car from a well-packaged entry-level luxury sedan. BMW design Chief, Adrian Van Hooydonk said, "The new BMW 4 series will prove to be marked by its standalone design." F82 4 series Coupe and F83 4 series Convertible designer, Won Kyu Kang believes that he has done exactly that, boasting that the expression of the 4 series body details underline a departure from the 3 series and into a new identity. (KURTULUS2021)

3. Performance and Driving Experience

Handling and agility is another of the polarising factors that distinguishes the more focused 4-series away from the 3-series. The 3-series has very competent handling and is very capable in the corners. This makes use of the new rear-wheel drive technology, similar to the 3-series, and this is still offered in the saloon variant. The modern suspension with the large chassis is able to give a composed ride on most terrains. However, it is the new 4-series that features a more dynamic handling. The chassis is lower and wider with increased torsional rigidity, overall giving a more balanced weight distribution and a lower centre of gravity than the 3-series. The suspension has been fine-tuned and tweaked, giving it a sportier edge and a more agile feel in the corners than the 3-series. Dropping the hardtop convertible variant from the 3-series, the 4-series convertible has the same 3-series variant and is offered with a modern new suspension and agility package similar to the coupé version.

The performance and driving experience of the 3-series and the 4-series can have many similarities. However, it is the contrast in performance that distinguishes the two. The 3-series offers a top class range of engines, starting with a 2.0L 4-cylinder 184bhp engine in the 320i, to the top of the range 3.0L 6-cylinder engine in the 335i. The 335i engine uses twin-scroll turbo technology to deliver a powerful 306bhp, which is a proven engine used to great success in the 5-series, thus offering a very involving drive. The 320d engine is one of the best in its class, offering excellent performance and fuel economy. However, it is the 4-series that features the new and improved more powerful engines. The 428i incorporates the same 2.0L 4-cylinder engine as the 320i, but with more power at 245bhp. The top of the range 4-series has the impressive 3.0L 6-cylinder engine that has been improved to offer 306bhp.

3.1. Engine options and power output

All the operations revolve around the motor. Presently there are no turbo-diesel models due to be presented in Australia (2014) so we will zero in on petrol motors. 3 Series is expected to dispatch with a 4-chamber 2.0L turbocharged motor delivering 135kW of force and 300Nm of force contrasted with a 2.0L turbocharged 4-chamber motor in the 420i which creates 135kW nonetheless an expansion of 20Nm at 320Nm. Likewise, the 3 series highlights a 4-chamber 2.0L turbocharged creating 180kW and 350Nm motor in 328i which is accessible for the two cars. This motor contrasts in the 3 arrangement being on proposal with an inline 6 chamber 3.0L turbocharged motor creating 225kW and 400 Nm in the 335i contrasted with 428i's 2.0L turbocharged 4-chamber at a force of 180kW and 350Nm. Next is the 335i which has ceased creation in the 3 arrangement and will be supplanted by the 340i which will match the 340i in the 4 arrangement at a 3.0L turbocharged inline 6-chamber which produces 240kW and 450Nm of force, be that as it may, the 340i in both the 3 and 4 arrangement will be the solitary models to highlight this motor alternative. This sums up to a sum of 7 unique motor choices in the 3 arrangement and a sum of 5 unique choices in the 4 arrangement all with differentiations in pull and strength.

3.2. Handling and agility comparison

The 3-series cars are considered by many to be the driver's car in its class. They only come with rear-wheel drive and the chassis is perfectly poised, giving the car beautiful balance. BMW has been making rear-wheel drive cars for a very long time now, and over the years they have become very good at it. The 3-series is the perfect example. The level of handling has been determined to be ideal for what most drivers are looking for. It doesn't take a genius to realize that the 3-series is a well-balanced, rear-driven sedan. The way it moves through corners is enough to give one a feeling of a true driving experience, and it is also very forgiving should a correction in steering be required. It is also being said that the handling of the 3-series is better than the previous 5-series, which in its time was also considered a class leader. The 4-series is also considered to be a driver's car. The chassis dynamics have been the primary focus of the 4-series' development. From the time the 3-series was split to create the 4-series, design changes have made the 4-series a more aggressive car in all aspects. Therefore, it has been determined that the 4-series is a more aggressive car than the 3-series with a slightly oversteery driving style. The increased level of feedback through the steering wheel would allow the driver to more clearly identify the limit of grip the car has. Due to its more aggressive nature, should the 4-series be optioned with the variable sport steering, the overall handling and agility can be one step better than that of the 3-series, although this will heavily depend on the preference of steering response.

3.3. Acceleration and top speed variations

The specific performance numbers of acceleration and top speed vary between models and with the specifications of different engines in each respective series. The highest performing model of the 3 Series is the 335i, which accelerates from 0-60mph in just 5.4 seconds and is electronically limited to 130mph. On the other hand, the 320i takes 8.3 seconds to reach 60mph and is also limited to 130mph. The lower-end model 328i slots in between the two with a 5.7-second 0-60 time. On the opposite end of the spectrum, the ActiveHybrid 3 is even faster than the 335i, accelerating from 0-60 in 5.2 seconds but is also limited to 130mph. Taking into account that top speeds in excess of 100mph are not legal in most Western countries and that the practically attainable top speed limits in any given area are much lower, it is unlikely that a purchase of any of the aforementioned 3 Series models would be strongly influenced by expected top speed. Unfortunately, for other high-speed aficionados, the top speeds of the 3 Series are somewhat disappointing, no pun intended. Aside from the 335i, there is no indication if other models' top speeds are limited by the electronic limiter, but the unequivocal statement from BMW that the company has decided to cut top speeds across the board on many of its cars to improve fuel economy is a hint that the days of unlimited German executive sedans may be over. This is further proven when comparing expected top speeds on these base models in the current 3 Series with the data for the older E90 3 Series from 2006. On that model, the 330i and 328i were expected to reach 155mph and a 325i 128i were expected to reach 130mph. The current F30 3 Series is a relatively heavy car, and it seems that the F30's weight and improved fuel economy through a cut in top speed are inversely proportional. With the evolution of brand new models, technology, and in keeping with ever-changing regulations, customers who prefer maximum rate of velocity should expect poor acceleration and less top speed from any base model vehicle in the future.

3.4. Ride comfort and suspension differences

The 4 Series shares the same chassis and suspension setup as the F30 3 Series. The standard suspension layout comprises MacPherson struts at the front, five-link rear setup, and anti-roll bars. In a similar fashion to the F30 3 Series, the ride can be harsh over rough surfaces due to the firm suspension setup. However, body control is excellent and steering precision is improved with increased grip over the 3 Series, largely due to wider front and rear tracks and lower ride height. The 4 Series will also have the option of adaptive M suspension with variable damping. This provides an automatic change in the damper force to each individual wheel, providing improved comfort and a smoother ride. The effect of the variable damping will be more pronounced than the 3 Series, as the hardware has been tuned specifically for the 4 Series to enhance ride comfort and increase stability.

The 3 Series BMW is renowned for having sharp handling and a sporty feel. Unfortunately, this nature can cause the ride to become uncomfortable over rough surfaces. The suspension on standard 3 Series models is quite firm. It comprises of MacPherson struts at the front and five-link rear suspension. The firmer setup of the suspension allows for less pitch and body roll during cornering, but the compromise is that all road imperfections are transmitted through to the cabin. The optional EDC (electronic damper control) and M Sport adaptive suspension reduce this effect slightly, but the ride is still less forgiving than competitive models. The 3 Series is due to gain the option of adaptive M suspension in late 2013, which provides automatic adjustment of the damping to provide better ride comfort with improved dynamics.

4. Interior Features and Technology

The disparity in the interior design is relatively tangible as the 3 Series and 4 Series are designed for different audiences. The 3 Series has conventional luxury that you expect from BMW. The saloon is spacious, comfortable, and secure. The design is not overcomplicated and uses high-quality materials throughout. The 4 Series also uses high-quality materials, but the interior design is much more focused on the driver. It has a higher seating position than the 3 Series, offering a better view of the road, and there is also an option to have sports seats. The dashboard is nearly identical to the 3 Series apart from the slightly more driver-focused center console. Moving to the rear of the car, the 3 Series offers good head and legroom, capable of seating 3 adults on short journeys. It is essentially a larger and more comfortable cabin than the 4 Series. The 4 Series is a 4-seater, and the coupe design means that headroom is restricted in the rear. Legroom is similar to the 3 Series, but it is obviously limited to 4 passengers. The slightly more sporty interior design combined with the increase in comfort and interior space in the 3 Series means that the cabin design points go to the saloon.

4.1. Variations in cabin design and materials

The 3 Series and 4 Series share the same platform and the similarities continue in the cabin. The key difference between them in this aspect is that the 4 Series has a coupe body style, while the 3 Series has a four-door sedan at its base and a few other variations. The 3 Series and 4 Series have the same interior dimensions, save for the 4 Series coupe, which has two less inches of rear headroom. Material, design, and construction are all similar in the cabin area. Both have a driver-oriented cockpit and a clean, elegant design. The interior of either car can be spiced up with a classy M Sport Line, which includes a special steering wheel, an anthracite headliner, and various other trinkets depending on the package. Overall, there are no big differences in the cabin if one is only comparing the coupe and gran coupe 3 Series models. Where there are differences are the Interior Dimensions and the Convertible 3 Series. The 3 Series sedan and 4 Series coupe share exactly the same interior dimensions. The convertible version of the 3 Series is where things take a turn and this is where the biggest difference in the two cars' interiors are seen. Measures are an albeit minute 0.3 inches less rear headroom and 0.6 inches less rear legroom when comparing the 4 Series to the convertible 3 Series. In terms of styling, materials used and quality of finish, the 4 Series is slightly ahead of the 3 Series, though they are very similar. The 4 Series has a slightly more sporty and upmarket feel to it, compared to the three series. The design is much alike, clean and uncluttered. Both cars have intuitive driver-oriented ergonomic layouts, ideal for dynamic driving. Material quality in both cars is very high and there is a wide choice of finishes and colours. The standard interior trim is high-gloss black on both cars, a wood finish or aluminium finish is available. Dakota leather upholstery is also available in the same colours for each car. However, the 4 Series has the added option of extended trim for that extra bit of luxury. This gives the top half of the cabin additional stitching and the option of classier, high quality leathers. While the differences are not dramatic, the material choice combined with the top-notch finish does make the 4 Series feel like the more premium car. In conclusion, the cabin area of the 3 Series and 4 Series is very similar, so for someone looking at the coupe model of a 3 Series and thinking to upgrade, you won't be far away from home. However, in comparison the 4 Series is ahead in terms of cabin luxury and it trumps the 3 Series when it comes to the convertible model.

4.2. Differences in seating comfort and space

The 4 Series has a very similar concept to the 3 Series when designing drivers at an ideal seating position and performance. The only major differences are the 10-way power adjustable seats with power adjustable headrest and availability of a track package to increase the side bolster and backrest angle adjustability with the 4 Series base seats. This concept becomes much more different when comparing rear seating for the driver's passengers.

Seating comfort and space for the driver and front seat passenger is one of the most essential concepts of an automobile, because it is the driving position as well as driving performance that ultimately has the most influence on deciding to go with a certain model. The new 3 Series and 4 Series are quite similar when discussing seating comfort and space for the driver, as both vehicles have virtually the same front seat space dimensions and layouts. Starting with the 3 Series, the seating position was engineered to give drivers an increase in comfort and confidence when driving. This was done by ensuring the best possible visibility and ease of access to all the important controls. This concept would be applicable to nearly all cars, and the 3 Series has delivered on it, offering an 8-way power adjustable seat with memory and 2-way power adjustable headrest. This is a slight upgrade from the standard 6-way manually adjustable seat, as well as the 2-way manually adjustable headrest found in 6th generation 3 Series models. The new 3 Series seats provide a comfortable and supportive seating position for the driver, given the power adjustment settings and increased side bolster and backrest angle adjustability. The bolster support becomes more evident with the option of sports seats that have an upgrade to 10-way power adjustable seats and a significant increase in leg and upper thigh support.

Where the 3 Series and 4 Series differ is the rear seating, as the new 3 Series dimensions for rear seat leg and shoulder room are 35.2 inches and 55 inches respectively. The rear seating for the 4 Series also has 35.2 inches of legroom, but has more shoulder room at 55.3 inches. The slight difference in rear seat shoulder room would not be very distinguishable, but the 4 Series rear seat passengers benefit most from the extra 1.8 inches of rear seat legroom due to greater space allocation. Considering rear seat passengers in both vehicles, the greater space allocation in the 4 Series rear seating will be beneficial for comfort and movement inside the vehicle. This is fairly substantial, as it fulfills the reliability of the daunting phrase from the BMW official website, which states, "Change is in sight. Performance goes beyond engine power and handling. Every detail, no matter how small, contributes to the new exhilaration experienced in the 2017 4 Series."

When discussing seating comfort and space in an automobile, it is important to take into account the space allocation for both the driver and the passengers, as well as the quality of the seats in terms of comfort and support. The new 3 Series and 4 Series are quite similar when comparing front seat comfort, as both vehicles have relatively the same space allocation for the driver and front seat passenger. The 3 Series comes with 42 inches of legroom and 56 inches of shoulder room for the front seat passengers. In comparison, the 4 Series has slightly less front seat legroom at 41.8 inches, but also has 56 inches of shoulder room for the front seat passengers. With that being said, the minor difference in front seat leg and shoulder room for both vehicles would not have a significant impact on comfort and space for the driver and front seat passenger, given the similarities in these dimensions.

4.3. Technology features and infotainment systems

One area where the 3 Series and 4 Series are very similar is technology; they share a wide range of infotainment technology, control systems, and also a good deal of mobile connectivity too. Both cars are available with iDrive, BMW's acclaimed control system, and there's a choice of either the standard 'Professional' multimedia package that employs a 6.5in screen, or the optional upgrade with a bigger 8.8in screen that comes as part of the Professional Multimedia package. This adds a touch-sensitive controller to the iDrive rotary dial and eight programmable buttons to store favorite shortcuts that don't come with the standard system. Other functions of the upgraded system include 3D mapping and a three-year subscription to BMW Online service which connects your car to the internet via a built-in SIM card, enabling all sorts of online functionality for navigation and even things like web radio. Said car SIM card also means the car is always connected via BMW Online and BMW TeleServices (for service calls and maintenance info), which have a multitude of functions that range from real-time traffic info to sending destination information to the car from your computer or smartphone. Both model ranges come with Bluetooth, USB, and mobile app functionality as standard, but enriched iPhone and (upcoming) Android connectivity can be enabled via an additional cost enhanced Bluetooth and USB with Smartphone Integration package. Other optional technology available on both ranges includes an intelligent voice control system and full-color Head-Up display that projects a variety of information including navigation instructions and the current speed onto the windscreen, so you don't have to take your eyes off the road.

4.4. Safety and driver assistance technologies

BMW 3 Series and 4 Series provide many of the same advanced safety and driver assistance features. However, the 4 Series does offer a few more advanced safety features beyond those of the 3 Series. Both offer stability control, anti-lock brakes, automatic crash notification, adaptive brake lights, and an available parking assistant. Available on all 4 Series, users can add a rear view camera, much like it is seen on the 3 Series. However, it adds a top view camera with even more advanced camera features including a 3D camera and a bird's eye view, creating a more complete picture of the vehicle in parking situations. The 4 Series active driving assistant is a step up from the 3 Series driver assistance package in that it offers all of the same features found in the 3 Series driver assistance package, and then adds lane departure warning and pedestrian protection. This package is designed to aid the driver in preventing collisions through the use of warnings, and if necessary, autonomous brake activation. This feature is an improvement from the standard collision mitigation that can be found on both the 3 Series and 4 Series. This package is meant to help prevent collisions, whereas the collision mitigation system is designed to only minimize the effects of a collision. Finally, the 4 Series offers an available blind spot detection feature which is not available on the 3 Series. With a few added features, the 4 Series does offer the same level of advanced safety features and driver assistance technologies seen on the 3 Series, and then takes a step further with a more complete package.


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