2020 Mercedes AMG SLC vs. 2020 BMW Z4

Detailed Review, Specifications & Comparison

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Safety

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The AMG SLC has standard head airbag curtains which act as a forgiving barrier between the driver and outboard passenger's upper bodies and the window and pillars. Combined with high-strength steel door beams and lower side airbags this system increases head protection in broadside collisions. The Z4 doesn't offer side airbag protection for the head.

Both the AMG SLC and the Z4 have standard driver and passenger frontal airbags, front side-impact airbags, driver knee airbags, front seatbelt pretensioners, four-wheel antilock brakes, traction control, electronic stability systems to prevent skidding, crash mitigating brakes, daytime running lights, rearview cameras, driver alert monitors, available lane departure warning systems and rear parking sensors.

Warranty

© 1999 - 2020 Advanta-STAR Automotive Research. All rights reserved. This vehicle comparison and all of the content in it are provided only by license from Advanta-STAR Automotive Research Corporation of America. If you are not a legally licensed user of this vehicle comparison, it is against federal law to access it, copy it, forward it or use it in any manner whatsoever. Any unauthorized use of this vehicle comparison is a violation of U.S. and international law and is punishable criminally and civilly. 6IUEX-0KENZ 45.55.47.189 2020/02/24

There are over 10 percent more Mercedes dealers than there are BMW dealers, which makes it easier should you ever need service under the AMG SLC’s warranty.

Reliability

© 1999 - 2020 Advanta-STAR Automotive Research. All rights reserved. This vehicle comparison and all of the content in it are provided only by license from Advanta-STAR Automotive Research Corporation of America. If you are not a legally licensed user of this vehicle comparison, it is against federal law to access it, copy it, forward it or use it in any manner whatsoever. Any unauthorized use of this vehicle comparison is a violation of U.S. and international law and is punishable criminally and civilly. 6IUEX-0KENZ 45.55.47.189 2020/02/24

J.D. Power and Associates’ 2019 Initial Quality Study of new car owners surveyed provide the statistics that show that Mercedes vehicles are better in initial quality than BMW vehicles. J.D. Power ranks Mercedes 12th in initial quality. With 8 more problems per 100 vehicles, BMW is ranked 20th.

Engine

© 1999 - 2020 Advanta-STAR Automotive Research. All rights reserved. This vehicle comparison and all of the content in it are provided only by license from Advanta-STAR Automotive Research Corporation of America. If you are not a legally licensed user of this vehicle comparison, it is against federal law to access it, copy it, forward it or use it in any manner whatsoever. Any unauthorized use of this vehicle comparison is a violation of U.S. and international law and is punishable criminally and civilly. 6IUEX-0KENZ 45.55.47.189 2020/02/24

The AMG SLC’s 3.0 turbo V6 produces 130 more horsepower (385 vs. 255) and 89 lbs.-ft. more torque (384 vs. 295) than the Z4 sDrive30i’s standard 2.0 turbo 4-cylinder. The AMG SLC’s 3.0 turbo V6 produces 3 more horsepower (385 vs. 382) and 16 lbs.-ft. more torque (384 vs. 368) than the Z4 M40i’s standard 3.0 turbo 6-cylinder.

Fuel Economy and Range

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In heavy traffic or at stoplights the AMG SLC’s engine automatically turns off when the vehicle is stopped, saving fuel and reducing pollution. The engine is automatically restarted when the driver gets ready to move again. (Start/Stop isn’t accounted in present EPA fuel mileage tests.) The Z4 doesn’t offer an automatic engine start/stop system.

The AMG SLC has 2.2 gallons more fuel capacity than the Z4 (15.9 vs. 13.7 gallons), for longer range between fill-ups.

Transmission

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A nine-speed automatic is standard on the Mercedes AMG SLC, for better acceleration and lower engine speed on the highway. Only an eight-speed automatic is available for the Z4.

Brakes and Stopping

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For better stopping power the AMG SLC’s brake rotors are larger than those on the Z4:

AMG SLC

Z4 sDrive30i

Z4 M40i

Front Rotors

14.2 inches

13 inches

13.7 inches

Tires and Wheels

© 1999 - 2020 Advanta-STAR Automotive Research. All rights reserved. This vehicle comparison and all of the content in it are provided only by license from Advanta-STAR Automotive Research Corporation of America. If you are not a legally licensed user of this vehicle comparison, it is against federal law to access it, copy it, forward it or use it in any manner whatsoever. Any unauthorized use of this vehicle comparison is a violation of U.S. and international law and is punishable criminally and civilly. 6IUEX-0KENZ 45.55.47.189 2020/02/24

For better traction, the AMG SLC has larger front tires than the Z4 (F:235/40R18 & R:255/35R18 vs. F:225/45R18 & R:255/40R18).

The AMG SLC’s 235/40R18 front and 255/35R18 rear tires provide better handling because they have a lower 40 series front and 35 series rear profile (height to width ratio) that provides a stiffer sidewall than the Z4’s standard 45 series front and 40 series rear tires.

Chassis

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The AMG SLC is 7.6 inches shorter than the Z4, making the AMG SLC easier to handle, maneuver and park in tight spaces.

The AMG SLC’s standard power retractable hardtop allows a seamless transition from an open car, to a completely sealed coupe. The Z4 doesn’t offer a retractable hardtop.

Servicing Ease

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J.D. Power and Associates surveys of service recipients show that Mercedes service is better than BMW. J.D. Power ranks Mercedes fifth in service department satisfaction. With a 23% lower rating, BMW is ranked 11th.

Ergonomics

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The AMG SLC’s standard easy entry system raises the steering wheel, making it easier for the driver to get in and out. The Z4 doesn’t offer an easy entry system.

The AMG SLC’s front and rear power windows all lower with one touch of the switches, making it more convenient at drive-up windows and toll booths, or when talking with someone outside of the car. The Z4’s rear power window switches have to be held the entire time to open them fully.

In poor weather, headlights can lose their effectiveness as grime builds up on their lenses. This can reduce visibility without the driver realizing. The AMG SLC offers available headlight washers to keep headlight output high. The Z4 doesn’t offer headlight washers.

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