2020 BMW 3 Series vs 2021 Mercedes-Benz E-Class
Overview | |
MSRP$40,750 | MSRP$54,250 |
Listings70 | Listings19 |
Ratings & Reviews | |
User Reviews | User Reviews |
Expert reviews8.2 out of 10 | Expert reviews8.3 out of 10 |
Pros
Cons
| |
2020 BMW 3 Series Reviews SummaryDoes BMW still use “The Ultimate Driving Machine” as its advertising tagline? Yes, it does. And with the arrival of the 2020 BMW M340i, which slots between the existing 330i and the forthcoming BMW M3, the company proves there is substance behind the slogan. | |
2021 Mercedes-Benz E-Class Reviews SummaryWhen money is but a mild concern, a brand-new Mercedes-Benz is a reasonable purchase. The Mercedes-Benz E-Class is the company's most practical and versatile car, as high-quality and necessary in a nice garage as a Kitchen-Aid mixer is in a baker's kitchen. It offers four body styles, four engines, and dozens of colour schemes. Fast or efficient? Loud or library quiet? Modest or rich as hell? The E-Class, the brand's midsize car, is all of those things, depending on which of the 13 models you order and how deep into the options list you dive. For 2021, the E-Class receives a mid-cycle update for the infotainment system, engines, and exterior styling. We tested the Mercedes-AMG E53 that features a mild-hybrid inline-6 powertrain. | |
Popular Features & Specs | |
Engine2.0L 255 hp I4 | Engine2.0L 255 hp I4 |
Drive TrainRWD | Drive TrainRWD |
Seating Capacity5 | Seating Capacity5 |
Horsepower255 hp @ 5000 rpm | Horsepower255 hp @ 5800 rpm |
MPG City26 | MPG City22 |
MPG Highway36 | MPG Highway31 |
Engine | |
Engine Name2.0L 255 hp I4 | Engine Name2.0L 255 hp I4 |
Torque295 lb-ft @ 1450 rpm | Torque273 lb-ft @ 1800 rpm |
Horsepower255 hp @ 5000 rpm | Horsepower255 hp @ 5800 rpm |
DrivetrainRWD | DrivetrainRWD |
Fuel Economy | |
MPG City26 | MPG City22 |
MPG Highway36 | MPG Highway31 |
Interior | |
Seating Capacity5 | Seating Capacity5 |
Key Features | |
Navigation SystemStandard | Navigation SystemStandard |
Sunroof/MoonroofStandard | Sunroof/MoonroofStandard |
Safety | |
Front Crash Overall | Front Crash Overall5 |
Side Crash Overall | Side Crash Overall5 |
Dimensions & Capacity | |
Cargo Space13.0 cu ft | Cargo Space13.1 cu ft |
Curb Weight3589 lbs | Curb Weight3781 lbs |
Height56.8 in | Height57.8 in |
Length185.7 in | Length194.3 in |
Width81.4 in | Width81.3 in |
Wheelbase112.2 in | Wheelbase115.7 in |
Number of doors4 | Number of doors4 |
Overview | ||
MSRP | $40,750 | $54,250 |
Listings | ||
Ratings & Reviews | ||
User reviews | ||
Expert reviews | 8.2 out of 10Read full review | 8.3 out of 10Read full review |
Pros & cons | Pros
Cons
| |
Summary | Does BMW still use “The Ultimate Driving Machine” as its advertising tagline? Yes, it does. And with the arrival of the 2020 BMW M340i, which slots between the existing 330i and the forthcoming BMW M3, the company proves there is substance behind the slogan. | When money is but a mild concern, a brand-new Mercedes-Benz is a reasonable purchase. The Mercedes-Benz E-Class is the company's most practical and versatile car, as high-quality and necessary in a nice garage as a Kitchen-Aid mixer is in a baker's kitchen. It offers four body styles, four engines, and dozens of colour schemes. Fast or efficient? Loud or library quiet? Modest or rich as hell? The E-Class, the brand's midsize car, is all of those things, depending on which of the 13 models you order and how deep into the options list you dive. For 2021, the E-Class receives a mid-cycle update for the infotainment system, engines, and exterior styling. We tested the Mercedes-AMG E53 that features a mild-hybrid inline-6 powertrain. |
Video | ||
Popular Features & Specs | ||
Engine | 2.0L 255 hp I4 | 2.0L 255 hp I4 |
Drive Train | RWD | RWD |
Seating Capacity | 5 | 5 |
Horsepower | 255 hp @ 5000 rpm | 255 hp @ 5800 rpm |
MPG City | 26 | 22 |
MPG Highway | 36 | 31 |
Engine | ||
Engine Name | 2.0L 255 hp I4 | 2.0L 255 hp I4 |
Torque | 295 lb-ft @ 1450 rpm | 273 lb-ft @ 1800 rpm |
Horsepower | 255 hp @ 5000 rpm | 255 hp @ 5800 rpm |
Drivetrain | RWD | RWD |
Fuel Economy | ||
MPG City | 26 | 22 |
MPG Highway | 36 | 31 |
Interior | ||
Seating Capacity | 5 | 5 |
Key Features | ||
Navigation System | Standard | Standard |
Sunroof/Moonroof | Standard | Standard |
Safety | ||
Front Crash Overall | 5 | |
Side Crash Overall | 5 | |
Dimensions & Capacity | ||
Cargo Space | 13.0 cu ft | 13.1 cu ft |
Curb Weight | 3589 lbs | 3781 lbs |
Height | 56.8 in | 57.8 in |
Length | 185.7 in | 194.3 in |
Width | 81.4 in | 81.3 in |
Wheelbase | 112.2 in | 115.7 in |
Number of doors | 4 | 4 |
The 2020 BMW 3 Series evoked a sense of aquatic elegance, reminiscent of majestic marine life. Its design featured lidded headlights, a curved hood, wide lower air intakes, and an oversized grille, creating an appearance that was both dynamic and graceful. Despite its high pricing, the 3 Series, especially the M340i trim, was celebrated for its exhilarating driving experience. The interior offered a variety of customization options, with high-quality materials and a focus on improved quality, making the premium price more palatable.
In contrast, the 2021 Mercedes-Benz E-Class embraced a design philosophy of "sensual purity," with fluid, curvier forms that were slightly edgier than its predecessors. The E-Class was available in various body styles, each exuding elegance and sophistication. The interior was a showcase of luxury, with rich materials, intricate details, and advanced technology. Despite the absence of the classic standing hood ornament, the E-Class maintained its reserved and conservative exterior, while the interior was a lavish and inviting space.
















The 2020 BMW 3 Series was praised for its return to sporty handling, thanks to significant structural and suspension changes. The M340i trim featured a 3.0-litre turbo inline six-cylinder engine producing 382 horsepower and 369 pound-feet of torque. It was equipped with BMW’s rear-biased xDrive AWD drivetrain, a rear M Sport differential, and M Sport brakes. The 8-speed automatic transmission, while not manual, was expertly calibrated, offering a launch-controlled acceleration to 100 km/h in 4.3 seconds. The car's various driving modes and paddle shifters enhanced the driving experience, making it a joy for enthusiasts.
The 2021 Mercedes-Benz E-Class introduced electrified inline-six powertrains, with the E450 model featuring a hybrid system that provided extra power and torque. The E450's 3.0-litre engine produced 362 horsepower and 369 pound-feet of torque, with additional overboost from the battery. The AMG E53 model added a second turbo, delivering 429 horsepower and 384 pound-feet of torque. The AMG E63 S, with its 4.0-litre V8 engine, produced 603 horsepower and 627 pound-feet of torque. The E-Class offered a balance of performance and comfort, with advanced suspension systems and AWD providing stability and precision.
The 2020 BMW 3 Series offered supportive front seats that were both comfortable and accommodating for long drives. The interior featured high-quality leather, front-seat heaters, and a heated steering wheel. Rear-seat entry and exit were somewhat awkward, but once inside, the seats provided excellent support. The infotainment system was well-integrated, with a widescreen display and the best version of iDrive to date. Storage space was generous, with a trunk capacity of 479 litres, although its narrow design limited its practicality.
The 2021 Mercedes-Benz E-Class boasted a spacious cabin with ample headroom and legroom for four adults. The interior featured redesigned infotainment controls and a user-friendly layout. The E-Class offered various body styles, each with different cargo capacities, such as the sedan's 540 litres and the wagon's 640 litres. The E-Class Coupe and Convertible provided comfortable rear seats, while the wagon included a stowable rear-facing jump seat. The E-Class All-Terrain model added versatility with increased ground clearance and body cladding.
The 2020 BMW 3 Series featured an advanced iDrive infotainment system with a touchscreen display, natural voice recognition, and gesture control. The system was intuitive, with multiple ways to interact, including a knob and buttons on the centre console. The "Hey, BMW" voice recognition system was highly effective, and the head-up display was visible even with polarized sunglasses. Gesture control, while optional, added a unique touch to the user experience.
The 2021 Mercedes-Benz E-Class introduced the MBUX system, which offered a touchscreen interface with improved organization and reduced complexity. The system included natural voice processing, online searches, and gesture control. The E-Class featured advanced driver-assist technologies, massaging seats, and seat kinetics. The instrument cluster offered customizable displays, allowing drivers to choose between traditional or modern graphics. The E-Class provided a comprehensive suite of connected services and optional driving assists.
The 2020 BMW 3 Series offered an Advanced Driver Assistance package with various safety features. While the systems were accurate, they sometimes lacked smoothness. The lane-keeping assist system was notably abrupt, reminding drivers to stay engaged. The 3 Series received a Top Safety Pick+ rating from the IIHS when equipped with adaptive full LED headlights.
The 2021 Mercedes-Benz E-Class was one of the safest cars available, with a five-star overall rating from the NHTSA and a Top Safety Pick+ rating from the IIHS. The E-Class featured innovative safety technologies, such as Pre-Safe Sound and side collision protection. Standard safety features included forward automatic emergency braking, a driver-attention monitor, and blind-spot monitoring, with additional driver-assist features available as options.
CarGurus highlights

According to CarGurus experts, the overall rating for the 2020 BMW 3 Series is 8.2 out of 10, while the 2021 Mercedes-Benz E-Class scores 8.3 out of 10. Based on these ratings, the 2021 Mercedes-Benz E-Class is the recommended choice, offering a blend of luxury, safety, and advanced technology that slightly edges out the BMW 3 Series.
Choose the 2020 BMW 3 Series if:
- You prioritize sporty handling and driving dynamics.
- You appreciate a customizable interior with high-quality materials.
- You value advanced infotainment technology with intuitive controls.
Choose the 2021 Mercedes-Benz E-Class if:
- You seek a luxurious and spacious interior with advanced technology.
- You prioritize safety with a comprehensive suite of driver-assist features.
- You desire a versatile vehicle with multiple body style options.
CarGurus highlights

According to CarGurus experts, the overall rating for the 2020 BMW 3 Series is 8.2 out of 10, while the 2021 Mercedes-Benz E-Class scores 8.3 out of 10. Based on these ratings, the 2021 Mercedes-Benz E-Class is the recommended choice, offering a blend of luxury, safety, and advanced technology that slightly edges out the BMW 3 Series.
Choose the 2020 BMW 3 Series if:
Shop Now- You prioritize sporty handling and driving dynamics.
- You appreciate a customizable interior with high-quality materials.
- You value advanced infotainment technology with intuitive controls.
Choose the 2021 Mercedes-Benz E-Class if:
Shop Now- You seek a luxurious and spacious interior with advanced technology.
- You prioritize safety with a comprehensive suite of driver-assist features.
- You desire a versatile vehicle with multiple body style options.

By: CarGurus + AI
At CarGurus, our team of experienced automotive writers remain at the heart of our content operation, conducting hands-on car tests and writing insightful guides that are backed by years of industry experience. To complement this, we are harnessing AI to make our content offering more diverse and more helpful to shoppers than ever. To achieve this, our AI systems are based exclusively on CarGurus content, ratings and data, so that what we produce is both unique to CarGurus, and uniquely helpful to car shoppers.






































