Compare the2025 Rolls-Royce CullinanVS 2025 Mercedes G-Class

Both the Cullinan and G-Class have child safety locks to prevent children from opening the rear doors. The Cullinan 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 G-Class’ 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 Cullinan’s standard pretensioning seatbelts also sense rear collisions and remove slack from the seatbelts to help protect the occupants from whiplash and other injuries. The G-Class doesn’t offer a whiplash protection system.

A passive infrared night vision system optional on the Cullinan 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 G-Class doesn’t offer a night vision system.

For better protection of the passenger compartment, the Cullinan uses safety cell construction with a three-dimensional high-strength frame that surrounds the passenger compartment. It provides extra impact protection and a sturdy mounting location for door hardware and side impact beams. The G-Class uses a body-on-frame design, which has no frame members above the floor of the vehicle.

Both the Cullinan and the G-Class 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, 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 and driver alert monitors.

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

Rolls-Royce pays for scheduled maintenance on the Cullinan for 4 years and unlimited miles. Rolls-Royce will pay for oil changes, air filter replacements, cabin filter replacement, brake fluid replacement, inspections, and any other required maintenance. Mercedes doesn’t pay scheduled maintenance for the G-Class.

The Cullinan has more powerful engines than the G-Class:

As tested in Motor Trend the Cullinan Black Badge is faster than the G 550 3.0 turbo 6-cylinder hybrid:

On the EPA test cycle the Cullinan gets better mileage than the G-Class running its gasoline engine:

For better stopping power the Cullinan’s brake rotors are larger than those on the G-Class:

The Cullinan stops much shorter than the G-Class:

For better traction and acceleration, the Cullinan has larger standard rear tires than the G-Class (285/40R22 vs. 265/60R18).

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 G-Class’ 60 series tires. The Cullinan’s optional 295/35R23 rear tires have a lower 35 series profile than the G-Class’ optional 40 series tires.

For better ride, handling and brake cooling the Cullinan has standard 22-inch wheels. Smaller 18-inch wheels are standard on the G-Class. The Cullinan’s optional 23-inch wheels are larger than the 21-inch wheels optional on the AMG G 63.

Changing a flat tire near traffic can be dangerous and inconvenient. The run-flat tires available on the Cullinan can be driven up to 50 miles without any air pressure, allowing you to drive to a service station for a repair. The G-Class doesn’t offer run-flat tires.

For superior ride and handling, the Rolls-Royce Cullinan has fully independent front and rear suspensions. An independent suspension allows the wheels to follow the road at the best angle for gripping the pavement, without compromising ride comfort. The Mercedes G-Class has a solid rear axle, with a non-independent rear suspension.

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

The Cullinan has a standard automatic front and rear load leveling suspension to keep ride height level with a heavy load or when towing. The Cullinan’s height leveling suspension allows the driver to raise ride height for better off-road clearance and then lower it again for easier entering and exiting and better on-road handling. The G-Class doesn’t offer a load leveling suspension.

For a smoother ride and more stable handling, the Cullinan’s wheelbase is 15.9 inches longer than on the G-Class (129.7 inches vs. 113.8 inches).

For better handling and stability, the track (width between the wheels) on the Cullinan is 2.3 inches wider in the front and 1.2 inches wider in the rear than the average track on the G-Class.

The Cullinan’s front to rear weight distribution is more even (49% to 51%) than the G-Class’ (53% to 47%). This gives the Cullinan more stable handling and braking.

The Cullinan handles at .83 G’s, while the AMG G 63 pulls only .75 G’s of cornering force in a Car and Driver skidpad test.

The Cullinan Black Badge executes Motor Trend’s “Figure Eight” maneuver 3.2 seconds quicker than the G 550 (26.6 seconds @ .68 average G’s vs. 29.8 seconds @ .58 average G’s).

For better maneuverability, the Cullinan’s turning circle is 1 foot tighter than the AMG G 63’s (43.3 feet vs. 44.3 feet). The Cullinan’s turning circle is 1.3 feet tighter than the G-Class’ (43.3 feet vs. 44.6 feet).

Unibody construction lowers the Cullinan’s center of gravity significantly without reducing ground clearance. This contributes to better on the road handling and better off-road performance and stability. In addition, unibody construction makes the chassis stiffer, improving handling and reducing squeaks and rattles. The G-Class doesn’t use unibody construction, but a body-on-frame design.

The Cullinan has 5 cubic feet more passenger volume than the G-Class (112 vs. 107).

The Cullinan has .9 inches more front legroom and 3.4 inches more rear legroom than the G-Class.

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 G-Class doesn’t offer tailgating seats.

Pressing a switch automatically lowers or raises the Cullinan’s rear seats, to make changing between cargo and passengers easier. The G-Class 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 G-Class’ rear cargo window doesn’t open.

To make loading and unloading groceries and cargo easier, especially for short adults, the Cullinan has a standard power tailgate, which opens and closes automatically by pressing a button. The G-Class doesn’t offer a power cargo door.

The Cullinan has a standard heads-up display that projects speed, warning, navigation instruction and driver assistance information readouts in front of the driver’s line of sight, allowing drivers to view information without diverting their eyes from the road. The G-Class doesn’t offer a heads-up display.

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 G-Class doesn’t offer a power rear door.

Heated windshield washer nozzles are standard on the Cullinan to prevent washer fluid and nozzles from freezing and help continue to keep the windshield clear in sub-freezing temperatures. The G-Class doesn’t offer heated windshield washer nozzles.

The Cullinan’s standard side window demisters help clear frost or condensation from the side windows in the winter. The G-Class doesn’t even offer side window demisters, so the driver may have to wipe the windows from the outside to gain side vision.

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

Manual rear side window sunshades are available in the Cullinan to help block heat and glare for the rear passengers. The G-Class doesn’t offer rear side window sunshades.

Optional air conditioned front and rear seats keep the Cullinan’s passengers comfortable and take the sting out of hot leather in summer. The G-Class doesn’t offer air-conditioned seats in the rear.

The Cullinan has standard massaging front seats. Massaging front seats cost extra on the G-Class. 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 G-Class.