Compare the2026 Rolls-Royce CullinanVS 2026 Porsche Cayenne Coupe

For enhanced safety, the front and rear seat shoulder belts of the Rolls-Royce Cullinan have pretensioners to tighten the seatbelts and eliminate dangerous slack in the event of a collision and force limiters to limit the pressure the belts will exert on the passengers. The Porsche Cayenne Coupe doesn’t offer pretensioners for its rear seat belts.

Both the Cullinan and the Cayenne Coupe have standard driver and passenger frontal airbags, front side-impact airbags, driver and front passenger knee airbags, side-impact head airbags, 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, around view monitors, rear cross-path warning, driver alert monitors and available night vision systems.

The Rolls-Royce Cullinan weighs 454 to 1433 pounds more than the Porsche Cayenne Coupe. The NHTSA advises that heavier vehicles are much safer in collisions than their significantly lighter counterparts.

The Cullinan comes with a full 4-year/unlimited-mile basic warranty, which covers the entire truck and includes 24-hour roadside assistance. The Cayenne Coupe’s 4-year/50,000-mile basic warranty expires sooner.

Rolls-Royce pays for scheduled maintenance on the Cullinan for 3 years and unlimited miles longer than Porsche pays for maintenance for the Cayenne Coupe (4/unlimited vs. 1/10,000).

The Cullinan has more powerful engines than the Cayenne Coupe:

The Cullinan has 5.4 gallons more fuel capacity than the Cayenne Coupe E-Hybrid’s standard fuel tank (23.8 vs. 18.4 gallons), for longer range between fill-ups.

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

The Cullinan’s standard 255/45R22 front and 285/40R22 rear tires provide better handling because they have a lower 45 series front and 40 series rear profile (height to width ratio) that provides a stiffer sidewall than the Cayenne Coupe’s standard 55 series front and 45 series rear tires.

For better ride, handling and brake cooling the Cullinan has standard 22-inch wheels. Smaller 20-inch wheels are standard on the Cayenne Coupe. The Cullinan’s optional 23-inch wheels are larger than the 22-inch wheels optional on the Cayenne Coupe.

Having a flat tire is dangerous, inconvenient and expensive. The self-sealing tires available on the Cullinan can automatically seal most punctures up to 3/16 of an inch, effectively preventing most flat tires. The Cayenne Coupe doesn’t offer self-sealing tires.

The front and rear suspension of the Cullinan uses air springs for a smoother, controlled ride than the Cayenne Coupe, which uses coil springs. Air springs maintain proper ride height and ride more smoothly.

For a smoother ride and more stable handling, the Cullinan’s wheelbase is 15.7 inches longer than on the Cayenne Coupe (129.7 inches vs. 114 inches).

As tested by Car and Driver, the interior of the Cullinan is quieter than the Cayenne S Coupe:

The Cullinan has 3.7 inches more front headroom, 2.1 inches more rear headroom and 2.9 inches more rear legroom than the Cayenne Coupe.

Flexibility is maximized at the game, campground or a drive-in theatre in the Cullinan when its optional tailgating rear seats are deployed, allowing people to sit facing out of the tailgate. (Do not use while vehicle is in motion.) The Cayenne Coupe doesn’t offer tailgating seats.

The Cullinan has a larger cargo volume with its rear seat folded than the Cayenne Coupe with its rear seat folded (68.2 vs. 53 cubic feet).

Pressing a switch automatically lowers or raises the Cullinan’s rear seats, to make changing between cargo and passengers easier. The Cayenne Coupe doesn’t offer automatic folding seats.

The Cullinan’s rear cargo window opens separately from the rest of the tailgate door to allow quicker loading of small packages. The Cayenne Coupe’s rear cargo window doesn’t open.

The Cullinan has a higher standard payload capacity than the Cayenne Coupe (1027 vs. 853 lbs.).

The Cullinan 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.

If the windows are left open on the Cullinan the driver can close all of them 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 Cullinan’s power side reverse swing out doors make it much easier to load and unload kids and cargo. One touch opens the door, before you even get to the sport utility. The Cayenne Coupe doesn’t offer a power rear door.

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

The Cullinan has standard front air conditioned seats and offers them optionally in the rear. This keeps the passengers comfortable and takes the sting out of hot seats in summer. The Cayenne Coupe doesn’t offer air-conditioned seats in the rear.

The Cullinan has standard massaging front seats. Massaging front seats cost extra on the Cayenne Coupe. The Cullinan also offers optional massaging rear seats in order to maximize comfort and eliminate fatigue on long trips. Massaging rear seats aren’t available in the Cayenne Coupe.