2020 Mercedes AMG GT 4-Door vs. 2020 BMW 8 Series Gran Coupe

Detailed Review, Specifications & Comparison

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Safety

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For enhanced safety, the front seat shoulder belts of the Mercedes AMG GT 4-Door are height-adjustable to accommodate a wide variety of driver and passenger heights. A better fit can prevent injuries and the increased comfort also encourages passengers to buckle up. The BMW 8 Series Gran Coupe doesn’t offer height-adjustable seat belts.

Over 200 people are killed each year when backed over by motor vehicles. The AMG GT 4-Door has a standard Rear Cross Traffic Brake that use rear sensors to monitor and automatically apply the brakes to prevent a rear collision. The 8 Series Gran Coupe doesn’t offer backup collision prevention brakes.

To provide maximum traction and stability on all roads, All-Wheel Drive is standard on the AMG GT 4-Door. But it costs extra on the 8 Series Gran Coupe.

Both the AMG GT 4-Door and the 8 Series Gran Coupe have standard driver and passenger frontal airbags, front side-impact airbags, driver knee airbags, side-impact head airbags, 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 around view monitors.

Warranty

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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 GT 4-Door’s warranty.

Reliability

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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

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The AMG GT 4-Door has more powerful engines than the 8 Series Gran Coupe:

Horsepower

Torque

AMG GT 53 3.0 turbo 6-cylinder hybrid

429 HP

384 lbs.-ft.

AMG GT 63 4.0 turbo V8

577 HP

590 lbs.-ft.

AMG GT 63 S 4.0 turbo V8

630 HP

664 lbs.-ft.

840i Gran Coupe 3.0 turbo 6-cylinder

335 HP

368 lbs.-ft.

M850i Gran Coupe 4.4 turbo V8

523 HP

553 lbs.-ft.

Fuel Economy and Range

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An engine control system that can shut down some of the engine’s cylinders helps improve the AMG GT 4-Door 63/63 S’ fuel efficiency. The 8 Series Gran Coupe doesn’t offer a system that can shut down part of the engine.

The AMG GT 4-Door has 3.1 gallons more fuel capacity than the 8 Series Gran Coupe (21.1 vs. 18 gallons), for longer range between fill-ups.

Environmental Friendliness

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In its Green Vehicle Guide, the U.S. Environmental Protection Agency (EPA) rates the Mercedes AMG GT 4-Door higher (5 to 6 out of 10) than the BMW 8 Series Gran Coupe (3). This means the AMG GT 4-Door produces up to 23.4 pounds less smog-producing pollutants than the 8 Series Gran Coupe every 15,000 miles.

Transmission

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A nine-speed automatic is available on the Mercedes AMG GT 4-Door, for better acceleration and lower engine speed on the highway. Only an eight-speed automatic is available for the 8 Series Gran Coupe.

Brakes and Stopping

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For better stopping power the AMG GT 4-Door’s optional front brake rotors are larger than those on the 8 Series Gran Coupe:

AMG GT V8

8 Series

Front Rotors

15.8 inches

15.6 inches

The AMG GT 4-Door offers optional heat-treated ceramic brake rotors, which last ten to twenty times as long as conventional cast iron rotors, don’t rust, don’t fade during repeated high speed braking, and their lighter weight contribute to better braking, handling and acceleration. The 8 Series Gran Coupe doesn’t offer ceramic brake rotors.

Tires and Wheels

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For better traction, the AMG GT 4-Door has larger standard tires than the 8 Series Gran Coupe (F:255/45R19 & R:285/40R19 vs. F:245/45R18 & R:275/40R18). The AMG GT 4-Door’s optional tires are larger than the largest tires available on the 8 Series Gran Coupe (F:275/35R21 & R:315/30R21 vs. F:245/45R18 & R:275/40R18).

For better ride, handling and brake cooling the AMG GT 4-Door has standard 19-inch wheels. Smaller 18-inch wheels are standard on the 840i Gran Coupe. The AMG GT 4-Door’s optional 21-inch wheels are larger than the 20-inch wheels optional on the 8 Series Gran Coupe.

Suspension and Handling

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The AMG GT 53 has a standard automatic load leveling suspension to keep ride height level with a heavy load or when towing. The 8 Series Gran Coupe doesn’t offer a load leveling suspension.

The AMG GT 4-Door’s drift compensation steering can automatically compensate for road conditions which would cause the vehicle to drift from side to side, helping the driver to keep the vehicle straight more easily. The 8 Series Gran Coupe doesn’t offer drift compensation steering.

For better handling and stability, the average track (width between the wheels) on the AMG GT 4-Door is 1.7 inches wider in the front than the track on the 8 Series Gran Coupe.

For better maneuverability, the AMG GT 4-Door’s turning circle is .4 feet tighter than the 840i Gran Coupe’s (40 feet vs. 40.4 feet). The AMG GT 4-Door’s turning circle is 1.4 feet tighter than the M850i Gran Coupe’s (40 feet vs. 41.4 feet).

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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Heated windshield washer nozzles are standard on the AMG GT 4-Door to prevent washer fluid and nozzles from freezing and help continue to keep the windshield clear in sub-freezing temperatures. The 8 Series Gran Coupe doesn’t offer heated windshield washer nozzles.

To shield the driver and front passenger’s vision over a larger portion of the windshield and side windows, the AMG GT 4-Door has standard extendable sun visors. The 8 Series Gran Coupe doesn’t offer extendable visors.

The AMG GT 4-Door offers an optional center folding armrest for the rear passengers. A center armrest helps make rear passengers more comfortable. The 8 Series Gran Coupe doesn’t offer a rear seat center armrest.

The AMG GT 4-Door offers optional massaging front seats in order to maximize comfort and eliminate fatigue on long trips. Massaging seats aren’t available in the 8 Series Gran Coupe.

The AMG GT 4-Door offers an optional 115-volt a/c outlet on the center console, allowing you to recharge a laptop or run small household appliances without special adapters that can break or get misplaced. The 8 Series Gran Coupe doesn’t offer a house-current electrical outlet.

Recommendations

© 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 2020/02/29

The Mercedes AMG GT outsold the BMW 8 Series by 33% during the 2019 model year.

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