2020 BMW 3 Series vs 2021 Mercedes-Benz S-Class

2020 BMW 3 Series
2020 BMW 3 Series
$40,750MSRP
Overview
Overview
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2021 Mercedes-Benz S-Class
2021 Mercedes-Benz S-Class
$109,800MSRP
Overview
Overview
OverviewShop Now
2020 BMW 3 Series
$40,750MSRP
Overview
Overview
OverviewShop Now
2021 Mercedes-Benz S-Class
$109,800MSRP
Overview
Overview
OverviewShop Now

CarGurus highlights

Winning Vehicle Image

According to CarGurus experts, the overall rating for 2020 BMW 3 Series is 8.2 out of 10, while the 2021 Mercedes-Benz S-Class scores 7.5 out of 10. Based on these ratings, the 2020 BMW 3 Series is the recommended choice for consumers seeking a thrilling driving experience, advanced technology features, and strong safety capabilities, although keep in mind that these models aren't direct rivals.

Choose the 2021 Mercedes-Benz S-Class if:

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7.5of 10overall
  • You value luxurious comfort and spaciousness, with increased front and rear headroom, more rear legroom, and a larger cargo space.
  • You desire advanced technology features such as a 12.3-inch digital instrument cluster, 12.8-inch OLED central touchscreen, wireless Apple CarPlay and Android Auto, and a 30-speaker Burmester audio system.
  • You prioritize safety, with a plethora of features including an industry-first rear-passenger airbag, adaptive cruise control, automated lane centering, and more.

Choose the 2020 BMW 3 Series if:

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8.2of 10overall
  • You prioritize a thrilling driving experience with significant structural and suspension changes, robust turbocharged engine, and rear-biased all-wheel-drive system.
  • You appreciate advanced technology features such as a touchscreen display, natural voice recognition, and gesture control.
  • You seek a vehicle with strong safety features, including adaptive full LED headlights and advanced driving assistance systems.
Overview

MSRP

$40,750

MSRP

$109,800

Average price

$28,291

Average price

$85,890

Listings

832

Listings

191
Ratings & Reviews
User Reviews
User Reviews

Expert reviews

8.2 out of 10

Expert reviews

7.5 out of 10
Pros
  • Fun to drive
  • Comfortable
  • Powerful engine
Cons
  • Potentially polarizing design
  • Poor value for money
Pros
  • Powerful engine
  • Comfortable
  • Impressive technology
Cons
  • High price

2020 BMW 3 Series Reviews 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 M3, the company proves there is substance behind the slogan.

2021 Mercedes-Benz S-Class Reviews Summary

The S-Class not only sits at the top of the Mercedes hierarchy in price and prestige, but it has also long served as a technological showcase. In the press release for the redesigned 2021 S-Class, Mercedes repeatedly noted the innovations—from anti-lock brakes to airbags—that were introduced on the big sedan and eventually trickled down to mainstream vehicles.

With the previous generation dating back to the 2014 model year (with a significant update for 2018), the Mercedes-Benz S-Class was in need of an update to maintain that status, and to keep pace with other full-size luxury sedans like the Audi A8, BMW 7 Series, and Lexus LS. To do that, the new S-Class gets a more sophisticated infotainment system, new powertrains, and more aerodynamic bodywork, among other features.

The 2021 S-Class launches in two configurations, both with 4Matic all-wheel drive (AWD) and EQ Boost mild-hybrid systems. The S500 4Matic has a six-cylinder engine, while the S580 4Matic has a V8. We spent a few days with the Mercedes-Benz S580 for this review. A Mercedes-Maybach S680 4Matic version will follow in the first half of 2022, and you can expect a new AMG performance version sometime in the future as well.

Popular Features & Specs

Engine

2.0L 255 hp I4

Engine

3.0L 429 hp I6

Drive Train

RWD

Drive Train

AWD

Seating Capacity

5

Seating Capacity

5

Horsepower

255 hp @ 5000 rpm

Horsepower

429 hp @ 6100 rpm

MPG City

26

MPG City

20

MPG Highway

36

MPG Highway

29
2020 BMW 3 Series
2020 BMW 3 Series
$40,750MSRP
Overview
Overview
OverviewShop Now
2021 Mercedes-Benz S-Class
2021 Mercedes-Benz S-Class
$109,800MSRP
Overview
Overview
OverviewShop Now
2020 BMW 3 Series
$40,750MSRP
Overview
Overview
OverviewShop Now
2021 Mercedes-Benz S-Class
$109,800MSRP
Overview
Overview
OverviewShop Now

CarGurus highlights

Winning Vehicle Image

According to CarGurus experts, the overall rating for 2020 BMW 3 Series is 8.2 out of 10, while the 2021 Mercedes-Benz S-Class scores 7.5 out of 10. Based on these ratings, the 2020 BMW 3 Series is the recommended choice for consumers seeking a thrilling driving experience, advanced technology features, and strong safety capabilities, although keep in mind that these models aren't direct rivals.

Choose the 2021 Mercedes-Benz S-Class if:

Shop Now
7.5of 10overall
  • You value luxurious comfort and spaciousness, with increased front and rear headroom, more rear legroom, and a larger cargo space.
  • You desire advanced technology features such as a 12.3-inch digital instrument cluster, 12.8-inch OLED central touchscreen, wireless Apple CarPlay and Android Auto, and a 30-speaker Burmester audio system.
  • You prioritize safety, with a plethora of features including an industry-first rear-passenger airbag, adaptive cruise control, automated lane centering, and more.

Choose the 2020 BMW 3 Series if:

Shop Now
8.2of 10overall
  • You prioritize a thrilling driving experience with significant structural and suspension changes, robust turbocharged engine, and rear-biased all-wheel-drive system.
  • You appreciate advanced technology features such as a touchscreen display, natural voice recognition, and gesture control.
  • You seek a vehicle with strong safety features, including adaptive full LED headlights and advanced driving assistance systems.
Overview
MSRP
$40,750
$109,800
Average price
$28,291
$85,890
Listings
Ratings & Reviews
User reviews
4.8
5.0
Expert reviews

8.2 out of 10

Read full review

7.5 out of 10

Read full review
Pros & cons
Pros
  • Fun to drive
  • Comfortable
  • Powerful engine
Cons
  • Potentially polarizing design
  • Poor value for money
Pros
  • Powerful engine
  • Comfortable
  • Impressive technology
Cons
  • High price
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 M3, the company proves there is substance behind the slogan.

The S-Class not only sits at the top of the Mercedes hierarchy in price and prestige, but it has also long served as a technological showcase. In the press release for the redesigned 2021 S-Class, Mercedes repeatedly noted the innovations—from anti-lock brakes to airbags—that were introduced on the big sedan and eventually trickled down to mainstream vehicles.

With the previous generation dating back to the 2014 model year (with a significant update for 2018), the Mercedes-Benz S-Class was in need of an update to maintain that status, and to keep pace with other full-size luxury sedans like the Audi A8, BMW 7 Series, and Lexus LS. To do that, the new S-Class gets a more sophisticated infotainment system, new powertrains, and more aerodynamic bodywork, among other features.

The 2021 S-Class launches in two configurations, both with 4Matic all-wheel drive (AWD) and EQ Boost mild-hybrid systems. The S500 4Matic has a six-cylinder engine, while the S580 4Matic has a V8. We spent a few days with the Mercedes-Benz S580 for this review. A Mercedes-Maybach S680 4Matic version will follow in the first half of 2022, and you can expect a new AMG performance version sometime in the future as well.

Video
Popular Features & Specs
Engine
2.0L 255 hp I4
3.0L 429 hp I6
Drive Train
RWD
AWD
Seating Capacity
5
5
Horsepower
255 hp @ 5000 rpm
429 hp @ 6100 rpm
MPG City
26
20
MPG Highway
36
29
Look and feel
2020 BMW 3 Series
8/10
2021 Mercedes-Benz S-Class
7/10
CarGurus experts rate the 2020 BMW 3 Series as 8 out of 10 and the 2021 Mercedes-Benz S-Class as 7 out of 10. The 2020 BMW 3 Series is described as reminiscent of awe-inspiring creatures, with lidded headlights, bulging curved hood, wide lower air intakes, and an oversize grille giving the car an aquatic appearance. The 2021 Mercedes-Benz S-Class, on the other hand, features a classic Mercedes hood ornament and grille, with a hint of ostentation. The S-Class comes standard with 19-inch wheels, while 20-inch and 21-inch wheels are optional.
Performance
2020 BMW 3 Series
10/10
2021 Mercedes-Benz S-Class
9/10
CarGurus experts rate the 2020 BMW 3 Series 10 out of 10 and the 2021 Mercedes-Benz S-Class 9 out of 10. The 2020 BMW 3 Series, particularly the M340i trim, is praised for its significant structural and suspension changes, robust turbocharged 3.0-liter inline 6-cylinder engine, and rear-biased xDrive all-wheel-drive system. The 2021 Mercedes-Benz S-Class offers impressive specs with the S500 4Matic using a 3.0-liter turbocharged inline-six engine and the S580 4Matic featuring a 4.0-liter twin-turbo V8.
Form and function
2020 BMW 3 Series
7/10
2021 Mercedes-Benz S-Class
8/10
CarGurus experts rate the 2020 BMW 3 Series 7 out of 10 and the 2021 Mercedes-Benz S-Class 8 out of 10. The 2020 BMW 3 Series is described as simple and supportive, with high-quality leather, front-seat heaters, and a heated steering wheel. The 2021 Mercedes-Benz S-Class offers more front and rear headroom, as well as more rear legroom than its predecessor, and has increased cargo space by 0.7 cubic feet over the previous-generation S-Class.
Technology
2020 BMW 3 Series
9/10
2021 Mercedes-Benz S-Class
9/10
CarGurus experts rate the 2020 BMW 3 Series 9 out of 10 and the 2021 Mercedes-Benz S-Class 9 out of 10. The 2020 BMW 3 Series features a touchscreen display, natural voice recognition, and gesture control, while the 2021 Mercedes-Benz S-Class includes a 12.3-inch digital instrument cluster and 12.8-inch OLED central touchscreen, with wireless Apple CarPlay and Android Auto and six USB ports.
Safety
2020 BMW 3 Series
9/10
2021 Mercedes-Benz S-Class
7/10
CarGurus experts rate the 2020 BMW 3 Series 9 out of 10 and the 2021 Mercedes-Benz S-Class 7 out of 10. The 2020 BMW 3 Series is equipped with advanced driving assistance systems (ADAS) and adaptive full LED headlights, while the 2021 Mercedes-Benz S-Class offers a plethora of safety features, including an industry-first rear-passenger airbag, adaptive cruise control, automated lane centering, and more.
Cost Effectiveness
2020 BMW 3 Series
6/10
2021 Mercedes-Benz S-Class
5/10
CarGurus experts rate the 2020 BMW 3 Series 6 out of 10 and the 2021 Mercedes-Benz S-Class 5 out of 10. The 2020 BMW 3 Series is described as rarely a cost-effective choice, with high starting prices and additional costs for desired features. The 2021 Mercedes-Benz S-Class starts at a high price point, and many key features are optional extras, requiring additional investment for a nicely equipped version.
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By: CarGurus + AI

This car comparison has been created with using generative AI. It is based entirely on CarGurus expert review content, ratings and data, and leverages our extensive library of hands-on product tests to create thousands of unique comparisons to help shoppers choose the right car.

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