Compare the2025 Acura MDXVS 2025 Rolls-Royce Cullinan

For enhanced safety, the front seat shoulder belts of the Acura MDX 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 MDX 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.

In a Vehicle-to-Vehicle Frontal Crash Prevention 2.0 test conducted by the Insurance Institute for Highway Safety (IIHS), the Acura MDX achieved a “Acceptable” rating - the second highest possible - for its performance in forward collision warning and automatic braking systems, demonstrating its excellent capabilities in preventing collisions. The Rolls-Royce Cullinan has not been tested.

Both the MDX 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, traction control, electronic stability systems to prevent skidding, crash mitigating brakes, daytime running lights, lane departure warning systems, blind spot warning systems, rearview cameras, rear cross-path warning, driver alert monitors, available all wheel drive and around view monitors.

The Acura MDX achieved a “Top Safety Pick” rating from the Insurance Institute for Highway Safety (IIHS) for the 2025 model year. This recognition was based on its impressive performance in the small overlap frontal crash test, updated moderate overlap front crash test, updated side impact crash test, headlight evaluations, and pedestrian crash prevention testing. The Cullinan has not yet been evaluated by the IIHS for 2025.

Acura’s powertrain warranty covers the MDX 2 years longer than Rolls-Royce covers the Cullinan. Any repair needed on the engine, transmission, axles, joints or driveshafts is fully covered for 6 years or 70,000 miles. Coverage on the Cullinan ends after only 4 years.

The MDX’s corrosion warranty is 1 year longer than the Cullinan’s (5 vs. 4 years).

There are over 7 times as many Acura dealers as there are Rolls-Royce dealers, which makes it much easier should you ever need service under the MDX’s warranty.

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

An engine control system that can shut down some of the engine’s cylinders helps improve the MDX’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 MDX’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 MDX 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 Acura MDX higher (4 out of 10) than the Rolls-Royce Cullinan (2). This means the MDX produces up to 15.6 pounds less smog-producing pollutants than the Cullinan every 15,000 miles.

For more complete vehicle control the MDX 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 10-speed automatic is standard on the Acura MDX, for better acceleration and lower engine speed on the highway. Only an eight-speed automatic is available for the Cullinan.

For better traction, the MDX Type S’ tires are larger than the largest tires available on the Cullinan (275/40R21 vs. 255/40R23).

The MDX has a standard easy tire fill system. When inflating the tires, the vehicle’s integrated tire pressure sensors keep track of the pressure as the tires fill and tell the driver when the tires are inflated to the proper pressure. The Cullinan doesn’t offer vehicle monitored tire inflation.

The MDX SH-AWD has a standard space-saver spare (not available on FWD/Type S) 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. Some tire options on the Cullinan don’t have a run-flat feature, either.

For better handling and stability, the track (width between the wheels) on the MDX is .7 inches wider in the front and 1.8 inches wider in the rear than on the Cullinan.

The MDX Type S handles at .87 G’s, while the Cullinan pulls only .83 G’s of cornering force in a Car and Driver skidpad test.

The MDX Type S executes Motor Trend’s “Figure Eight” maneuver quicker than the Cullinan Black Badge (25.7 seconds @ .72 average G’s vs. 26.6 seconds @ .68 average G’s).

For better maneuverability, the MDX’s turning circle is 2.8 feet tighter than the Cullinan’s (40.5 feet vs. 43.3 feet).

For greater off-road capability the MDX has a greater minimum ground clearance than the Cullinan (7.3 vs. 6.8 inches), allowing the MDX to travel over rougher terrain without being stopped or damaged. The MDX Type S’ minimum ground clearance is 2.6 inches higher than on the Cullinan (9.4 vs. 6.8 inches).

The Acura MDX may be more efficient, handle and accelerate better because it weighs about 1550 to 1750 pounds less than the Rolls-Royce Cullinan.

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

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

The MDX uses computer-generated active noise cancellation to help remove annoying noise and vibration from the passenger compartment, especially at low frequencies. The Cullinan doesn’t offer active noise cancellation.

The MDX has standard seating for 7 passengers; the Cullinan can only carry up to 5.

The MDX has 27.1 cubic feet more passenger volume than the Cullinan (139.1 vs. 112).

The MDX’s cargo area provides more volume than the Cullinan.

The MDX’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 MDX’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.

To make loading groceries and cargo easier when your hands are full, the MDX’s available liftgate can be opened and closed just by kicking your foot under the back bumper, leaving your hands completely free. The Cullinan doesn’t offer a hands-free gesture to open its tailgate, forcing you to put cargo down if your hands are full.

Standard Trailer Stability Assist on the MDX uses the Vehicle Stability Assist 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 MDX has a higher standard payload capacity than the Cullinan (1173 vs. 1012 lbs.).

The MDX has a higher maximum payload capacity than the Cullinan (1173 vs. 1027 lbs.).

The MDX offers a 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 MDX’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 improve rear visibility by keeping the rear window clear, the MDX has a standard rear fixed intermittent wiper with a full on position. The rear wiper standard on the Cullinan only has an intermittent setting, so in a hard rain visibility isn’t as good.

The MDX offers an optional 115-volt a/c outlet on the center console, allowing you to recharge a laptop or run small household appliances without special adapters that can break or get misplaced. The Cullinan doesn’t offer a house-current electrical outlet.

The MDX is available in both front-wheel drive and four-wheel drive configurations. The Cullinan doesn’t offer a two-wheel drive configuration.

Consumer Reports® recommends the Acura MDX, based on reliability, safety and performance.

The Acura MDX outsold the Rolls-Royce Cullinan by over 57 to one during 2024.