Compare the2025 Aston Martin DBXVS 2024 Rolls-Royce Cullinan

Both the DBX and Cullinan have rear cross-traffic warning, but the DBX has Rear Cross Traffic Warning (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 DBX 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, daytime running lights, lane departure warning systems, blind spot warning systems, around view monitors and rear cross-path warning.

The DBX’s corrosion warranty is 6 years longer than the Cullinan’s (10 vs. 4 years).

The DBX’s 4.0 turbo V8 produces 134 more horsepower (697 vs. 563) and 37 lbs.-ft. more torque (664 vs. 627) than the Cullinan’s standard 6.8 turbo V12. The DBX’s 4.0 turbo V8 produces 105 more horsepower (697 vs. 592) than the Cullinan Black Badge’s standard 6.8 turbo V12.

On the EPA test cycle the DBX gets better mileage than the Cullinan:

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

In heavy traffic or at stoplights the DBX’s 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 DBX has a standard cap-less fueling system. The fuel filler is automatically opened when the fuel nozzle is inserted and automatically closed when it’s removed. This eliminates the need to unscrew and replace the cap and it reduces fuel evaporation, which causes pollution. The Cullinan doesn’t offer a cap-less fueling system.

In its Green Vehicle Guide, the U.S. Environmental Protection Agency (EPA) rates the Aston Martin DBX higher (5 out of 10) than the Rolls-Royce Cullinan (3). This means the DBX produces up to 16.5 pounds less smog-producing pollutants than the Cullinan every 15,000 miles.

For more complete vehicle control the DBX has a 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 Aston Martin DBX, for better acceleration and lower engine speed on the highway. Only an eight-speed automatic is available for the Cullinan.

The DBX’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 stopping power the DBX’s front brake rotors are larger than those on the Cullinan:

The DBX has standard heat-treated ceramic brake rotors, which last ten to twenty times as long as conventional cast iron rotors, don’t rust, don’t fade during repeated high speed braking, and their lighter weight contribute to better braking, handling and acceleration. The Cullinan doesn’t offer ceramic brake rotors.

For better traction, the DBX has larger tires than the Cullinan (F:285/40R22 & R:325/35R22 vs. 255/50R21).

The DBX’s standard 285/40R22 front and 325/35R22 rear tires provide better handling because they have a lower 40 series front and 35 series rear profile (height to width ratio) that provides a stiffer sidewall than the Cullinan’s standard 50 series tires. The DBX’s optional 285/35R23 front and 325/30R23 rear tires have a lower 35 series front and 30 series rear profile than the Cullinan’s optional 45 series tires.

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

The DBX has a standard space-saver spare tire so you can replace a flat tire and drive to have the flat repaired or replaced. A spare tire 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.

For better maneuverability, the DBX’s turning circle is 2.6 feet tighter than the Cullinan’s (40.7 feet vs. 43.3 feet).

The Aston Martin DBX may be more efficient, handle and accelerate better because it weighs about 1350 pounds less than the Rolls-Royce Cullinan.

The DBX is 1 foot shorter than the Cullinan, making the DBX easier to handle, maneuver and park in tight spaces.

For excellent aerodynamics, the DBX has standard flush composite headlights. The Cullinan has recessed headlights that spoil its aerodynamic shape and create extra drag.

The DBX has a much larger cargo volume than the Cullinan with its rear seat up (22.5 vs. 19.8 cubic feet).

The DBX’s 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 DBX’s liftgate lifts up in one piece, completely out of the way of loading and unloading, while sheltering the cargo loading area. The Cullinan’s tailgate’s top part raises up, but the bottom part lowers, getting in the way of loading and making an uneven surface for sliding cargo.

Standard Trailer Stability Control on the DBX uses the Electronic Stability Control 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 DBX’s 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.

To better shield the driver and front passenger’s vision, the DBX has standard dual-element sun visors that can block glare from two directions simultaneously. The Cullinan doesn’t offer secondary sun visors.