2019 Mercedes AMG GT 4-Door vs. 2018 BMW M3

Detailed Review, Specifications & Comparison

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The AMG GT 4-Door’s pre-crash front seatbelts will tighten automatically in the event the vehicle detects an impending crash, improving protection against injury significantly. The M3 doesn’t offer pre-crash pretensioners.

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 M3 doesn’t offer backup collision prevention brakes.

The AMG GT 4-Door has all-wheel drive to maximize traction under poor conditions, especially in ice and snow. The M3 doesn’t offer all-wheel drive.

To help make backing safer, the AMG GT 4-Door’s cross-path warning system uses wide-angle radar in the rear bumper to alert the driver to vehicles approaching from the side, helping the driver avoid collisions. The M3 doesn’t offer a cross-path warning system.

The AMG GT 4-Door’s driver alert monitor detects an inattentive driver then sounds a warning and suggests a break. According to the NHTSA, drivers who fall asleep cause about 100,000 crashes and 1500 deaths a year. The M3 doesn’t offer a driver alert monitor.

Both the AMG GT 4-Door and the M3 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, daytime running lights, rearview cameras, available lane departure warning systems and around view monitors.

The Mercedes AMG GT 4-Door weighs 1009 to 1183 pounds more than the BMW M3. The NHTSA advises that heavier cars are much safer in collisions than their significantly lighter counterparts.


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.


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.


The AMG GT 4-Door has more powerful engines than the M3:



AMG GT 53 3.0 turbo 6 cyl. 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.

M3 3.0 turbo 6 cyl.

425 HP

406 lbs.-ft.

M3 Competition Package 3.0 turbo 6 cyl.

444 HP

406 lbs.-ft.

Fuel Economy and Range

An engine control system that can shut down half of the engine’s cylinders helps improve the AMG GT 4-Door 63/63 S’ fuel efficiency. The M3 doesn’t offer a system that can shut down part of the engine.

Regenerative brakes improve the AMG GT 4-Door 53’s fuel efficiency by converting inertia back into energy instead of wasting it. The M3 doesn’t offer a regenerative braking system.

The AMG GT 4-Door has 1.6 gallons more fuel capacity than the M3 (17.4 vs. 15.8 gallons), for longer range between fill-ups.

Environmental Friendliness

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 M3 (3). This means the AMG GT 4-Door produces up to 23.4 pounds less smog-producing pollutants than the M3 every 15,000 miles.


A nine-speed automatic is available on the Mercedes AMG GT 4-Door, for better acceleration and lower engine speed on the highway. Only a seven-speed automatic is available for the M3.

Tires and Wheels

For better traction and acceleration, the AMG GT 4-Door has larger standard rear tires than the M3 (285/40R19 vs. 275/40R18). The AMG GT 63 S’ rear tires are larger than the largest rear tires available on the M3 (295/35R20 vs. 285/30R20).

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 M3. The AMG GT 4-Door’s optional 21-inch wheels are larger than the 20-inch wheels on the M3 Competition Package.

Suspension and Handling

The AMG GT 53 has a standard automatic load leveling suspension to keep ride height level with a heavy load or when towing. The M3 doesn’t offer a load leveling suspension.

The AMG GT 4-Door’s drift compensation steering can automatically compensate for road conditions that would cause the vehicle to drift from side to side, helping the driver to keep the vehicle straight more easily. The M3 doesn’t offer drift compensation steering.

For a smoother ride and more stable handling, the AMG GT 4-Door’s wheelbase is 5.5 inches longer than on the M3 (116.2 inches vs. 110.7 inches).

For better handling and stability, the average track (width between the wheels) on the AMG GT 4-Door is 3.6 inches wider in the front and 2.3 inches wider in the rear than the track on the M3.


To almost totally eliminate engine vibration in the passenger area, the AMG GT 4-Door Dynamic Plus has an electronically controlled liquid-filled front engine mount. A computer-controlled electric current in the liquid changes its viscosity, allowing the mount to dampen the engine completely at all RPMs. The M3 uses conventional solid rubber engine mounts.

Cargo Capacity

To make loading and unloading groceries and cargo easier, especially for short adults, the AMG GT 4-Door has a standard power liftgate, which opens and closes automatically by pressing a button or just by kicking your foot under the back bumper, completely leaving your hands free. The M3 doesn’t offer a power trunk, so its trunk has to be closed manually.

Servicing Ease

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.


The AMG GT 4-Door has a standard remote vehicle starting system, so the vehicle can be started from inside the driver's house. This allows the driver to comfortably warm up the engine before going out to the vehicle. The climate system will also automatically heat or cool the interior. The M3 doesn’t offer a remote starting system.

Unlike the driver-only memory system in the M3, the AMG GT 4-Door has standard driver and passenger memory, so that when drivers switch, the memory setting adjusts the driver’s seat, steering wheel position and outside mirror angle and the front passenger seat also adjusts to the new passenger’s preset preferences.

The AMG GT 4-Door’s standard easy entry system raises the steering wheel, making it easier for the driver to get in and out. The M3 doesn’t offer an easy entry system.

The AMG GT 4-Door’s power parking brake sets with one touch and releases with one touch or automatically. The M3 has a lever-type parking brake that has to be strenuously raised to engage properly. It has to be lifted up more and a button depressed to release it.

The AMG GT 4-Door’s front and rear power windows all open or close fully with one touch of the switches, making it more convenient at drive-up windows and toll booths, or when talking with someone outside the car. The M3’s passenger windows don’t open or close automatically.

Optional air-conditioned seats in the AMG GT 4-Door keep the driver and front passenger comfortable and take the sting out of hot seats in summer. The M3 doesn’t offer air-conditioned seats.

To keep a safe, consistent following distance, the AMG GT 4-Door offers an optional Distronic, which alters the speed of the vehicle without driver intervention. This allows the driver to use cruise control more safely without constantly having to disengage it when approaching slower traffic. The M3 doesn’t offer an adaptive cruise control.

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 M3 doesn’t offer a house-current electrical outlet.

© 1991-2018 Advanta-STAR Automotive Research. All rights reserved.

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