Compare the2022 Porsche Cayenne CoupeVS 2021 Mercedes AMG GLC

The Porsche Cayenne Coupe has standard driver and front passenger side knee airbags mounted low on the dashboard. These airbags helps prevent the driver and front passenger from sliding under their seatbelts or the main frontal airbags; this keeps them better positioned during a collision for maximum protection. Knee airbags also help keep the legs from striking the dashboard, preventing knee and leg injuries in the case of a serious frontal collision. The AMG GLC doesn’t offer a front passenger side knee airbag.

The Cayenne Coupe has a standard Multi-collision Brake System, which automatically applies the brakes in the event of a crash to help prevent secondary collisions and prevent further injuries. The AMG GLC 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.

When descending a steep, off-road slope, the Cayenne Coupe’s standard Porsche Hill Control allows you to creep down safely. The AMG GLC doesn’t offer Porsche Hill Control.

A passive infrared night vision system optional on the Cayenne Coupe helps the driver to more easily detect people, animals or other objects in front of the vehicle at night. Using an infrared camera to detect heat, the system then displays the image on a monitor in the dashboard. The AMG GLC doesn’t offer a night vision system.

Both the Cayenne Coupe and the AMG GLC have standard driver and passenger frontal airbags, front side-impact airbags, driver knee airbags, side-impact head airbags, height adjustable front shoulder belts, four-wheel antilock brakes, all wheel drive, traction control, electronic stability systems to prevent skidding, crash mitigating brakes, daytime running lights, rearview cameras, available lane departure warning systems, blind spot warning systems, around view monitors and rear cross-path warning.

The Cayenne Coupe’s corrosion warranty is 7 years longer than the AMG GLC’s (12 vs. 5 years).

A reliable vehicle saves its owner time, money and trouble. Nobody wants to be stranded or have to be without a vehicle while it’s being repaired. Consumer Reports rates the Cayenne Coupe’s reliability 21 points higher than the AMG GLC.

J.D. Power and Associates rated the Cayenne Coupe third among upper midsize premium suvs in their 2021 Initial Quality Study. The AMG GLC isn’t in the top three in its category.

J.D. Power and Associates’ 2021 Initial Quality Study of new car owners surveyed provide the statistics that show that Porsche vehicles are better in initial quality than Mercedes vehicles. J.D. Power ranks Porsche 15th in initial quality. With 30 more problems per 100 vehicles, Mercedes is ranked 25th.

J.D. Power and Associates’ 2021 survey of the owners of three-year-old vehicles provides the long-term dependability statistics that show that Porsche vehicles are more reliable than Mercedes vehicles. J.D. Power ranks Porsche second in reliability, above the industry average. With 36 more problems per 100 vehicles, Mercedes is ranked 15th.

From surveys of all its subscribers, Consumer Reports’ January 2021 Auto Issue reports that Porsche vehicles are more reliable than Mercedes vehicles. Consumer Reports ranks Porsche 11 places higher in reliability than Mercedes.

The Cayenne Coupe has more powerful engines than the AMG GLC:

On the EPA test cycle the Cayenne Coupe running on electricity gets better mileage than the AMG GLC:

On the EPA test cycle the Cayenne Coupe running its gasoline engine gets better mileage than the AMG GLC:

The Cayenne E-Hybrid Coupe can drive on battery power alone for up to 17 miles. The AMG GLC must run its internal combustion engine to move.

Regenerative brakes improve the Cayenne Coupe’s fuel efficiency by converting inertia back into energy instead of wasting it. The AMG GLC doesn’t offer a regenerative braking system.

The Cayenne Coupe E-Hybrid’s standard fuel tank has 2.4 gallons more fuel capacity than the AMG GLC (19.8 vs. 17.4 gallons), for longer range between fill-ups. The Cayenne Coupe’s standard fuel tank has 6.3 gallons more fuel capacity than the AMG GLC (23.7 vs. 17.4 gallons).

For better stopping power the Cayenne Coupe CCB’s brake rotors are larger than those on the AMG GLC:

The Cayenne Coupe 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 AMG GLC doesn’t offer ceramic brake rotors.

The Cayenne Coupe Turbo has standard air brakes, which adjust the spoiler automatically during high-speed braking in order to shorten stopping distances. The AMG GLC doesn’t offer air brakes.

The Cayenne Coupe stops shorter than the AMG GLC:

For better traction, the Cayenne Coupe has larger standard tires than the AMG GLC (F:275/45R20 & R:305/40R20 vs. F:255/45R20 & R:285/40R20). The Cayenne Coupe’s optional tires are larger than the largest tires available on the AMG GLC (F:285/40R21 & R:315/35R21 vs. F:265/45R20 & R:295/40R20).

The Cayenne Coupe’s optional 285/35R22 front and 315/30R22 rear tires provide better handling because they have a lower 35 series front and 30 series rear profile (height to width ratio) that provides a stiffer sidewall than the AMG GLC’s optional 40 series front and 35 series rear tires.

For better ride, handling and brake cooling the Cayenne Coupe offers optional 22-inch wheels. The AMG GLC’s largest wheels are only 21-inches.

The Cayenne Coupe offers active sway bars, which help keep it flat and controlled during cornering, but disconnect at lower speeds to smooth the ride and offer greater off-road suspension articulation. This helps keep the tires glued to the road on-road and off. The AMG GLC doesn’t offer an active sway bar system.

The Cayenne Coupe offers an available adjustable active suspension system, which counteracts cornering forces actively, limiting body roll and improving handling and stability. Mercedes doesn’t offer an active suspension on the AMG GLC.

For better handling and stability, the average track (width between the wheels) on the Cayenne Coupe is 1.2 inches wider in the front and 1.2 inches wider in the rear than the average track on the AMG GLC.

The Cayenne Turbo Coupe handles at .98 G’s, while the AMG GLC 43 pulls only .91 G’s of cornering force in a Motor Trend skidpad test.

The Cayenne Turbo Coupe executes Motor Trend’s “Figure Eight” maneuver 1.1 seconds quicker than the AMG GLC 43 (24.1 seconds @ .82 average G’s vs. 25.2 seconds @ .75 average G’s).

For better maneuverability, the Cayenne Coupe w/Rear Wheel Steering’s turning circle is 4.6 feet tighter than the AMG GLC’s (35.1 feet vs. 39.7 feet).

For greater off-road capability the Cayenne Coupe has a 2.1 inches greater minimum ground clearance than the AMG GLC 63 (8.2 vs. 6.1 inches), allowing the Cayenne Coupe to travel over rougher terrain without being stopped or damaged. The Cayenne Coupe Air Suspension’s minimum ground clearance is 2.9 inches higher than on the AMG GLC 43 (9.6 vs. 6.7 inches).

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

The Cayenne Coupe has .4 inches more front headroom, .3 inches more front legroom, 1.8 inches more front shoulder room and 2.7 inches more rear legroom than the AMG GLC.

The Cayenne Coupe has a much larger cargo volume than the AMG GLC with its rear seat up (22 vs. 17.6 cubic feet).

The Cayenne Coupe’s standard towing capacity is much higher than the AMG GLC’s (7700 vs. 3500 pounds).

A trailer sway program is standard on the Cayenne Coupe, using the Porsche Stability Management sensors to detect trailer sway, then uses individual brakes to counteract any swaying and help keep the tow vehicle and trailer steady. A trailer sway program costs extra on the AMG GLC.

J.D. Power and Associates surveys of service recipients show that Porsche service is better than Mercedes. J.D. Power ranks Porsche first in service department satisfaction. With a 32% lower rating, Mercedes is ranked 6th.

The Cayenne Coupe’s instruments include an oil pressure gauge and a temperature gauge - which could save your engine! Often ‘idiot lights’ don’t warn you until damage has been done. The AMG GLC does not have an oil pressure gauge.

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

The Cayenne Coupe offers optional massaging front seats in order to maximize comfort and eliminate fatigue on long trips. Massaging seats aren’t available in the AMG GLC.

The Cayenne Coupe’s optional Active Park Assist can parallel park or back into a parking spot by itself, starting, stopping and changing direction automatically. Remote Park Assist will park and retrieve your car remotely: press a button and watch it park itself. This is ideal for tight locations. The AMG GLC’s automatic parking system does not offer parking by remote control.

Consumer Reports® recommends the Porsche Cayenne Coupe, based on reliability, safety and performance.