Compare the2024 Audi Q8VS 2024 Porsche Cayenne Coupe

The Q8’s pre-crash front seatbelts will tighten automatically in the event the vehicle detects an impending crash, improving protection against injury significantly. The Cayenne Coupe doesn’t offer pre-crash pretensioners.

Both the Q8 and Cayenne Coupe have child safety locks to prevent children from opening the rear doors. The Q8 has power child safety locks, allowing the driver to activate and deactivate them from the driver's seat and to know when they're engaged. The Cayenne Coupe’s child locks have to be individually engaged at each rear door with a manual switch. The driver can’t know the status of the locks without opening the doors and checking them.

Earlier warning of stopped traffic, traffic signals, dangerous road conditions, weather, or accidents, can keep driver's safer and prevent crashes. The Q8 has Car-to-X Services, a system that seemlesly communicates important warnings to the driver about impending danger, if they're available. The Cayenne Coupe doesn’t offer a system that can receive automated systems from infrastructure.

Both the Q8 and the Cayenne Coupe have standard driver and passenger frontal airbags, front and rear side-impact 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, post-collision automatic braking systems, daytime running lights, lane departure warning systems, blind spot warning systems, rearview cameras, rear cross-path warning, available night vision systems and around view monitors.

There are over 54 percent more Audi dealers than there are Porsche dealers, which makes it much easier should you ever need service under the Q8’s warranty.

On the EPA test cycle the Q8 gets better fuel mileage than the Cayenne S Coupe 4.0 turbo V8 running its gasoline engine (17 city/23 hwy vs. 15 city/21 hwy).

The Q8 has 4 gallons more fuel capacity than the Cayenne Coupe S E-Hybrid/Turbo E-Hybrid’s standard fuel tank (22.5 vs. 18.5 gallons), for longer range between fill-ups.

For better stopping power the Q8’s standard brake rotors are larger than those on the Cayenne Coupe:

In an emergency stopping situation, many drivers don’t press the brakes with enough force to stop the vehicle in the shortest distance. The Q8 has a standard brake assist system to detect emergency braking situations (by how hard and how quickly the brake pedal is pressed) and then automatically apply maximum braking immediately in order to help prevent a collision. The Cayenne Coupe doesn’t offer a brake assist feature.

For better traction, the Q8 has larger tires than the Cayenne Coupe (285/45R21 vs. 255/55R20).

The Q8’s standard tires provide better handling because they have a lower 45 series profile (height to width ratio) that provides a stiffer sidewall than the Cayenne Coupe’s standard 55 series front tires.

For better ride, handling and brake cooling the Q8 has standard 21-inch wheels. Smaller 20-inch wheels are standard on the Cayenne Coupe.

For a smoother ride and more stable handling, the Q8’s wheelbase is 3.9 inches longer than on the Cayenne Coupe (117.9 inches vs. 114 inches).

The Q8 has .5 inches more front legroom, .4 inches more front shoulder room, .2 inches more rear legroom and 2 inches more rear shoulder room than the Cayenne Coupe.

The Q8 has a much larger cargo volume with its rear seat up than the Cayenne Coupe with its rear seat up (30.5 vs. 20.9 cubic feet). The Q8 has a much larger cargo volume with its rear seat folded than the Cayenne Coupe with its rear seat folded (60.7 vs. 53 cubic feet).

The Q8 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 Cayenne Coupe doesn’t offer a remote starting system.

The Q8’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 Cayenne Coupe’s cruise control switches are unlit, making them difficult to find at night and operate safely.

To improve rear visibility by keeping the rear window clear, the Q8 has a standard rear wiper. The Cayenne Coupe doesn’t offer a rear wiper.

Laser headlights, standard on the Q8 Prestige, produce their light by firing blue lasers through phosphorus, a process that uses one-half the power of the Cayenne Coupe’s LED headlights. Laser headlights can have double the range of LEDs with a much smaller surface area.

To shield the driver and front passenger’s vision over a larger portion of the windshield and side windows, the Q8 has standard extendable sun visors. The Cayenne Coupe doesn’t offer extendable visors.

A manual rear sunshade is optional in the Q8 and power rear side window sunshades are optional in the Q8 (except Premium) to help block heat and glare for the rear passengers. The Cayenne Coupe doesn’t offer a rear sunshade.

Insurance will cost less for the Q8 owner. The Complete Car Cost Guide estimates that insurance for the Q8 will cost $1155 to $10410 less than the Cayenne Coupe over a five-year period.

IntelliChoice estimates that five-year ownership costs (depreciation, financing, insurance, fuel, fees, repairs and maintenance) for the Audi Q8 will be $6617 to $89334 less than for the Porsche Cayenne Coupe.