Compare the2023 Audi Q8VS 2023 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.

The Q8’s standard lane departure warning system alerts a temporarily inattentive driver when the vehicle begins to leave its lane. A lane departure warning system costs extra on the Cayenne Coupe.

The Q8 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 Cayenne Coupe’s blind spot costs extra.

To help make backing out of a parking space safer, the Q8’s standard rear cross-path warning system uses sensors in the rear to alert the driver to vehicles approaching from the side, helping the driver avoid collisions. The Cayenne Coupe doesn’t offer a rear cross-path warning system.

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, rearview cameras, available night vision systems and around view monitors.

For its top level performance in IIHS driver and passenger-side small overlap frontal, moderate overlap frontal, side impact, roof strength and head restraint tests, its standard vehicle-to-vehicle front crash prevention system, its standard vehicle-to-pedestrian front crash prevention system, and its standard headlight’s “Acceptable” rating, the Insurance Institute for Highway Safety grants the Q8 its highest rating: “Top Safety Pick Plus” for 2022, a rating granted to only 127 vehicles tested by the IIHS. The Cayenne Coupe has not been tested, yet.

There are over 56 percent more Audi dealers than there are Porsche dealers, which makes it much easier should you ever need service under the Q8’s warranty.

The Q8’s 3.0 turbo V6 hybrid produces 37 lbs.-ft. more torque (369 vs. 332) than the Cayenne Coupe’s standard 3.0 turbo V6.

On the EPA test cycle the Q8 gets better mileage than the Cayenne Coupe running its gasoline engine:

The Q8 has 2.7 gallons more fuel capacity than the Cayenne Coupe E-Hybrid’s standard fuel tank (22.5 vs. 19.8 gallons), for longer range between fill-ups.

In its Green Vehicle Guide, the U.S. Environmental Protection Agency (EPA) rates the Audi Q8 higher (5 out of 10) than the Porsche Cayenne Coupe (3 to 5). This means the Q8 produces up to 16.5 pounds less smog-producing pollutants than the Cayenne Coupe every 15,000 miles.

For better stopping power the Q8’s standard front 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. 275/45R20).

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. 22 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. 54.3 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 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 Cayenne Coupe.

If the windows are left open on the Q8 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 lower the windows from a distance using the keyless remote. The driver of the Cayenne Coupe can only operate the windows from inside the vehicle, with the ignition on.

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.

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 $790 to $10060 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 $7481 to $80941 less than for the Porsche Cayenne Coupe.