Compare the2024 Mercedes AMG GTVS 2024 Porsche 718 Cayman

Safety
Warranty
Engine
Fuel Economy and Range
Environmental Friendliness
Transmission and Drivetrain
Brakes and Stopping
Tires and Wheels
Suspension and Handling
Chassis
Passenger Space
Cargo Capacity
Ergonomics

Safety

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The Mercedes AMG GT’s pre-crash front seatbelts will tighten automatically in the event the vehicle detects an impending crash, improving protection against injury significantly. The 718 Cayman doesn’t offer pre-crash pretensioners.

In the past twenty years hundreds of infants and young children have died after being left in vehicles, usually by accident. When turning the vehicle off, drivers of the Mercedes AMG GT are reminded to check the back seat. The 718 Cayman doesn’t offer a back seat reminder.

The Mercedes AMG GT has a standard Post Collision Brake, which automatically applies the brakes in the event of a crash to help prevent secondary collisions and prevent further injuries. The 718 Cayman doesn’t offer a post collision braking system: in the event of a collision that triggers the airbags, more collisions are possible without the protection of airbags that may have already deployed.

Over 200 people are killed each year when backed over by motor vehicles. The Mercedes AMG GT has standard Close-Range Braking that uses rear sensors to monitor for objects to the rear and automatically applies the brakes to prevent a collision. The 718 Cayman doesn’t offer backup collision prevention brakes.

The Mercedes AMG GT has all-wheel drive to maximize traction under poor conditions, especially in ice and snow. The 718 Cayman doesn’t offer all-wheel drive.

Earlier warning of stopped traffic, traffic signals, dangerous road conditions, weather, or accidents, can keep driver's safer and prevent crashes. The Mercedes AMG GT has Car-to-X Communication, a system that seemlesly communicates important warnings to the driver about impending danger, if they're available. The 718 Cayman doesn’t offer a system that can receive automated systems from infrastructure or other vehicles.

The Mercedes AMG GT’s optional lane departure warning system alerts a temporarily inattentive driver when the vehicle begins to leave its lane. The 718 Cayman doesn’t offer a lane departure warning system.

The Mercedes AMG GT has a standard Surround View System to allow the driver to see objects all around the vehicle on a screen. The 718 Cayman only offers a rear monitor and front and rear parking sensors that beep or flash a light. That doesn’t help with obstacles to the sides.

The Mercedes AMG GT has a standard blind spot warning system that uses sensors to alert the driver to objects in the vehicle’s blind spots where the side view mirrors don’t reveal them. A system to reveal vehicles in the 718 Cayman’s blind spot costs extra.

To help make backing out of a parking space safer, the Mercedes AMG GT’s standard Rear Cross-Traffic Alert uses sensors in the rear to alert the driver to vehicles approaching from the side and Active Brake Assist automatically engages the brakes to help avoid a collision. The 718 Cayman doesn’t offer a rear cross-path warning system.

The Mercedes AMG GT’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 718 Cayman doesn’t offer a driver alert monitor.

Both the Mercedes AMG GT and the 718 Cayman have standard driver and passenger frontal airbags, front side-impact airbags, driver and front passenger knee airbags, side-impact head airbags, front seatbelt pretensioners, four-wheel antilock brakes, traction control, electronic stability systems to prevent skidding, daytime running lights and rearview cameras.

The Mercedes AMG GT weighs 1007 to 1303 pounds more than the Porsche 718 Cayman. The NHTSA advises that heavier cars are much safer in collisions than their significantly lighter counterparts.

Warranty

There are almost 2 times as many Mercedes dealers as there are Porsche dealers, which makes it much easier should you ever need service under the AMG GT’s warranty.

Engine

The Mercedes AMG GT has more powerful engines than the 718 Cayman:

	Horsepower	Torque
Mercedes AMG GT 55 4.0 turbo V8	469 HP	516 lbs.-ft.
Mercedes AMG GT 63 4.0 turbo V8	577 HP	590 lbs.-ft.
718 Cayman 2.0 turbo 4-cylinder	300 HP	280 lbs.-ft.
718 Cayman S 2.5 turbo 4-cylinder	350 HP	309 lbs.-ft.
718 Cayman GTS 4.0 4.0 GT3 6-cylinder	394 HP	309 lbs.-ft.
718 Cayman GT4 RS 4.0 DOHC 6-cylinder	493 HP	331 lbs.-ft.

As tested in Car and Driver the Mercedes AMG GT 63 is faster than the Porsche 718 Cayman (automatics tested):

	AMG GT	718 Cayman S	718 Cayman GTS 4.0
Zero to 60 MPH	2.7 sec	3.6 sec	3.4 sec
Quarter Mile	10.9 sec	12 sec	11.6 sec

Fuel Economy and Range

The Mercedes AMG GT has 4.3 gallons more fuel capacity than the 718 Cayman’s standard fuel tank (18.5 vs. 14.2 gallons), for longer range between fill-ups. The Mercedes AMG GT has 1.6 gallons more fuel capacity than the 718 Cayman’s optional fuel tank (18.5 vs. 16.9 gallons).

Environmental Friendliness

In its Green Vehicle Guide, the U.S. Environmental Protection Agency (EPA) rates the Mercedes AMG GT higher (5 out of 10) than the Porsche 718 Cayman (1 to 5). This means the Mercedes AMG GT produces up to 39 pounds less smog-producing pollutants than the 718 Cayman every 15,000 miles.

Transmission and Drivetrain

The Mercedes AMG GT comes standard with an automatic transmission, for driver comfort, especially in the city. Automatic costs extra on the 718 Cayman.

A nine-speed automatic (SMG) is standard on the Mercedes AMG GT, for better acceleration and lower engine speed on the highway. Only a seven-speed automatic is available for the 718 Cayman.

All wheel drive, available in the Mercedes AMG GT, provides the best traction for acceleration in wet, dry, and icy conditions. In corners, all wheel drive allows both outside wheels to provide power, balancing the car. This allows for better handling. The Porsche 718 Cayman is not available with all wheel drive.

Brakes and Stopping

For better stopping power the Mercedes AMG GT’s standard brake rotors are larger than those on the 718 Cayman:

	AMG GT	718 Cayman
Front Rotors	15.4 inches	13 inches
Rear Rotors	14.2 inches	11.8 inches

The Mercedes AMG GT stops shorter than the 718 Cayman:

	Mercedes AMG GT	718 Cayman
60 to 0 MPH	102 feet	106 feet	Motor Trend

Tires and Wheels

For better traction, the Mercedes AMG GT has larger tires than the 718 Cayman (F:295/30R20 & R:305/30R20 vs. F:235/45R18 & R:265/45R18). The Mercedes AMG GT’s tires are larger than the largest tires available on the 718 Cayman (F:295/30R20 & R:305/30R20 vs. F:245/35R20 & R:295/30R20).

The Mercedes AMG GT’s tires provide better handling because they have a lower 30 series profile (height to width ratio) that provides a stiffer sidewall than the 718 Cayman’s standard 45 series tires. The Mercedes AMG GT’s tires are lower profile than the 718 Cayman GT4 RS’ 35 series front tires.

For better ride, handling and brake cooling the Mercedes AMG GT has standard 20-inch wheels. Smaller 18-inch wheels are standard on the 718 Cayman. The Mercedes AMG GT’s optional 21-inch wheels are larger than the 20-inch wheels optional on the 718 Cayman.

Suspension and Handling

The Mercedes AMG GT offers an available active suspension system, which counteracts cornering forces actively, limiting body roll and improving handling and stability. Porsche doesn’t offer an active suspension on the 718 Cayman.

The Mercedes AMG GT’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 718 Cayman doesn’t offer drift compensation steering.

For a smoother ride and more stable handling, the Mercedes AMG GT’s wheelbase is 8.9 inches longer than on the 718 Cayman (106.3 inches vs. 97.4 inches).

For better handling and stability, the track (width between the wheels) on the Mercedes AMG GT is 6.3 inches wider in the front and 6 inches wider in the rear than the average track on the 718 Cayman.

The Mercedes AMG GT’s front to rear weight distribution is more even (54% to 46%) than the 718 Cayman’s (44.7% to 55.3%). This gives the Mercedes AMG GT more stable handling and braking.

The Mercedes AMG GT 63 handles at 1.06 G’s, while the 718 Cayman pulls only 1.00 G’s of cornering force in a Car and Driver skidpad test.

The Mercedes AMG GT 63 executes Motor Trend’s “Figure Eight” maneuver quicker than the 718 Cayman (23.4 seconds @ .89 average G’s vs. 24 seconds @ .81 average G’s).

Chassis

The front grille of the Mercedes AMG GT uses electronically controlled shutters to close off airflow and reduce drag when less engine cooling is needed. This helps improve highway fuel economy. The 718 Cayman doesn’t offer active grille shutters.

Passenger Space

The Mercedes AMG GT has standard seating for 4 passengers; the 718 Cayman can only carry 2.

Cargo Capacity

To make loading and unloading groceries and cargo easier, especially for short adults, the Mercedes AMG GT has a standard power trunk, 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 718 Cayman doesn’t offer a power trunk, so its trunk has to be closed manually.

Ergonomics

The Mercedes AMG GT 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 718 Cayman doesn’t offer a remote starting system.

Unlike the driver-only memory system optional at extra cost in the 718 Cayman, the Mercedes AMG GT has standard driver and passenger memory, so that when drivers switch, the memory setting adjusts the driver’s seat, steering wheel position, outside mirror angle, climate settings and radio stations and the front passenger seat also adjusts to the new passenger’s preset preferences.

The Mercedes AMG GT’s standard easy entry system raises the steering wheel and glides the driver’s seat back, making it easier for the driver to get in and out. An easy entry system costs extra on the 718 Cayman.

The Mercedes AMG GT offers an optional heads-up display that projects speed, tachometer and navigation instruction readouts in front of the driver’s line of sight, allowing drivers to view information without diverting their eyes from the road. The 718 Cayman doesn’t offer a heads-up display.

If the windows are left open on the Mercedes AMG GT the driver can close them all at the outside door handle or from a distance using the remote. On a hot day the driver can also lower the windows the same way. The driver of the 718 Cayman can only operate the windows from inside the vehicle, with the ignition on.

The Mercedes AMG GT has standard Keyless-Go that allows you to unlock the doors from either outside door handle, open the trunk, and start the engine, all without removing the key from the pocket or purse. Porsche Entry and Drive costs extra on the 718 Cayman.

The Mercedes AMG GT’s power window, power lock, power mirror and cruise control switches are lit from behind, making them plainly visible and easier to operate at night. The 718 Cayman’s cruise control switches are unlit, making them difficult to find at night and operate safely.

Heated windshield washer fluid is standard on the Mercedes AMG GT to defrost the washer nozzles and quickly clear ice and frost from the windshield without scraping. The 718 Cayman doesn’t offer heated windshield washer fluid.

The Mercedes AMG GT’s LED headlights produce a white, bright light using less electricity than the 718 Cayman’s standard xenon high intensity discharge (HID) headlights. HID headlights can be slow to reach full brightness or power cycle, causing issues when flashing them to signal other vehicles; LED headlights light instantly. LED lights also last about three to four times as long.

The Mercedes AMG GT has a standard heated steering wheel to take the chill out of steering on extremely cold winter days before the car heater warms up. A heated steering wheel costs extra on the 718 Cayman.

The Mercedes AMG GT offers optional massaging front seats in order to maximize comfort and eliminate fatigue on long trips. Massaging seats aren’t available in the 718 Cayman.

To quickly and conveniently keep personal devices charged without cables tangling and wearing out, the Mercedes AMG GT has a standard wireless phone charging system (Qi) in the front center console. The 718 Cayman doesn’t offer wireless personal charging.

The Mercedes AMG GT’s Active Parking Assist can parallel park or back into a parking spot by itself, starting, stopping and changing direction automatically. The 718 Cayman doesn’t offer an automated parking system.

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