Compare the2025 Mercedes G-ClassVS 2024 Rolls-Royce Cullinan

For enhanced safety, the front seat shoulder belts of the Mercedes G-Class are height-adjustable to accommodate a wide variety of driver and passenger heights. A better fit can prevent injuries and the increased comfort also encourages passengers to buckle up. The Rolls-Royce Cullinan doesn’t offer height-adjustable seat belts.

In the past twenty years hundreds of infants and young children have died after being left in vehicles, usually by accident. When turning the vehicle off, drivers of the G-Class are reminded to check the back seat if they opened the rear door before starting out. The Cullinan doesn’t offer a back seat reminder.

Both the G-Class and Cullinan have rear cross-traffic warning, but the G-Class has Active Brake Assist (automatically applies the brakes) to better prevent a collision when backing near traffic. The Cullinan’s Cross Traffic Warning doesn’t automatically brake.

Both the G-Class and the Cullinan 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 G-Class’ corrosion warranty is 1 year longer than the Cullinan’s (5 vs. 4 years).

There are over 10 times as many Mercedes dealers as there are Rolls-Royce dealers, which makes it much easier should you ever need service under the G-Class’ warranty.

The G 580’s electric motors produces 195 lbs.-ft. more torque (859 vs. 664) than the Cullinan Black Badge’s optional 6.8 turbo V12.

On the EPA test cycle the G-Class running on electricity gets better mileage than the Cullinan:

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

The G 580 can travel with zero emissions for 239 miles. The Cullinan can’t move without running its internal combustion engine.

An engine control system that can shut down some of the engine’s cylinders helps improve the G-Class AMG 63’s fuel efficiency. The Cullinan doesn’t offer a system that can shut down part of the engine.

Regenerative brakes improve the G-Class’ fuel efficiency by converting inertia back into energy instead of wasting it. The Cullinan doesn’t offer a regenerative braking system.

In heavy traffic or at stoplights the G-Class’ engine automatically turns off when the vehicle is stopped, saving fuel and reducing pollution. The engine is automatically restarted when the driver gets ready to move again. If the conditions warrant or the driver wishes, the system can be manually disabled at any time for the duration of a trip. The Cullinan doesn’t offer an automatic engine start/stop system.

The G-Class has 2.6 gallons more fuel capacity than the Cullinan (26.4 vs. 23.8 gallons), for longer range between fill-ups.

For more complete vehicle control the G-Class offers an optional manually controlled automatic, with the available convenience of an automatic transmission and the complete gear control of a manual transmission without the inconvenience of a clutch. A manually controlled automatic allows the driver to eliminate unwanted shifts and maximize engine braking by down shifting while cornering. The Cullinan doesn’t offer a transmission that allows complete gear control.

A nine-speed automatic is standard on the Mercedes G-Class, for better acceleration and lower engine speed on the highway. Only an eight-speed automatic is available for the Cullinan.

The G-Class AMG 63’s launch control uses engine electronics to hold engine RPM’s precisely in order to provide the most stable and rapid acceleration possible, using all of the available traction. The Cullinan doesn’t offer launch control.

For better traction, the G-Class has larger standard tires than the Cullinan (265/60R18 vs. 255/50R21). The G-Class’ optional tires are larger than the largest tires available on the Cullinan (295/40R22 vs. 255/50R21).

The G-Class’ optional tires provide better handling because they have a lower 40 series profile (height to width ratio) that provides a stiffer sidewall than the Cullinan’s optional 45 series tires.

The G-Class has a standard full size spare (not available on 580) so a flat doesn’t interrupt your trip. A full size spare isn’t available on the Cullinan; it requires you to depend on its run-flat tires, which limits mileage and speed before they are repaired. If a run-flat is damaged beyond repair by a road hazard your vehicle will have to be towed.

The Mercedes G-Class may be more efficient, handle and accelerate better because it weighs up to about 750 pounds less than the Rolls-Royce Cullinan.

The G 550 is 2 feet, 4.9 inches shorter than the Cullinan, making the G-Class easier to handle, maneuver and park in tight spaces.

The G-Class has a much larger cargo volume with its rear seat up than the Cullinan with its rear seat up (34.8 vs. 19.8 cubic feet). The G-Class has a much larger cargo volume with its rear seat folded than the Cullinan with its rear seat folded (68.6 vs. 68.2 cubic feet).

The G-Class’ standard rear seats fold to accommodate long and bulky cargo. The Cullinan w/Executive Rear Seats doesn’t offer folding rear seats, only a ski pass-through.

The G-Class 580 can be flat towed on all four wheels (dinghy towed), allowing recreational vehicle owners to bring it with them on the road. When they reach their destination, the G-Class can be unhitched and driven around locally. The Cullinan can’t be towed flat on the ground.

Standard Trailer Stability Assist on the G-Class uses the Electronic Stability Program sensors to detect trailer sway, then uses individual brakes to counteract any swaying and help keep the tow vehicle and trailer steady. The Cullinan doesn’t offer electronic trailer sway control.

The G-Class has a much higher standard payload capacity than the Cullinan (1235 vs. 952 lbs.).

The G-Class has a much higher maximum payload capacity than the Cullinan (1576 vs. 952 lbs.).

The G-Class 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 Cullinan doesn’t offer a remote starting system.

The G-Class’ front and rear power windows all open or close with one touch of the switches, making it more convenient at drive-up windows and toll booths, or when talking with someone outside of the car. The Cullinan’s rear power window switches have to be held the entire time to close them fully.

In poor weather, headlights can lose their effectiveness as grime builds up on their lenses. This can reduce visibility without the driver realizing. The G-Class has standard headlight washers to keep headlight output high. The Cullinan doesn’t offer headlight washers.

The Mercedes G-Class outsold the Rolls-Royce Cullinan by almost 8 to one during 2023.