Compare the2025 Acura RDXVS 2025 Infiniti QX55

Both the RDX and the QX55 have standard driver and passenger frontal airbags, front side-impact airbags, driver and front passenger knee airbags, side-impact head airbags, front seatbelt pretensioners, height adjustable front shoulder belts, plastic fuel tanks, 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, rearview cameras, rear cross-path warning and available around view monitors.

The National Highway Traffic Safety Administration does 35 MPH front crash tests on new vehicles. In this test, results indicate that the Acura RDX is safer than the Infiniti QX55:

New test not comparable to pre-2011 test results. More stars = Better. Lower test results = Better.

Side impacts caused 23% of all road fatalities in 2018, down from 29% in 2003, when the Insurance Institute for Highway Safety introduced its side barrier test. In order to continue improving vehicle safety, the IIHS has started using a more severe side impact test: 37 MPH (up from 31 MPH), with a 4180-pound barrier (up from 3300 pounds). The results of this newly developed test demonstrates that the Acura RDX is safer than the QX55:

The Acura RDX achieved a “Top Safety Pick” rating from the Insurance Institute for Highway Safety (IIHS) for the 2024 model year. This recognition was based on its impressive performance in the small overlap frontal crash test, updated side impact crash test, headlight evaluations, and pedestrian crash prevention testing. The QX55 is not a “Top Safety Pick” for 2024.

There are over 35 percent more Acura dealers than there are Infiniti dealers, which makes it easier should you ever need service under the RDX’s warranty.

A reliable vehicle saves its owner time, money and trouble. Nobody wants to be stranded or have to be without a vehicle while it’s being repaired. Consumer Reports rates the RDX’s reliability 30 points higher than the QX55.

J.D. Power and Associates’ 2024 survey of the owners of three-year-old vehicles provides the long-term dependability statistics that show that Acura vehicles are more reliable than Infiniti With 3 fewer problems per 100 vehicles in the first three years of ownership, J.D. Power ranks Acura higher than Infiniti.

From surveys of all its subscribers, Consumer Reports’ January 2024 Auto Issue reports that Acura vehicles are more reliable than Infiniti vehicles. Consumer Reports ranks Acura fourth in overall reliability. Infiniti is ranked 13th.

The RDX’s 2.0 turbo 4-cylinder produces 4 more horsepower (272 vs. 268) than the QX55’s 2.0 turbo 4-cylinder.

As tested in Motor Trend the Acura RDX is faster than the Infiniti QX55:

In heavy traffic or at stoplights the RDX’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 QX55 doesn’t offer an automatic engine start/stop system.

To lower fuel costs and make buying fuel easier, the Acura RDX uses regular unleaded gasoline (premium recommended for maximum performance). The QX55 requires premium, which can cost on average about 84.9 cents more per gallon.

The RDX has 1.1 gallons more fuel capacity than the QX55 (17.1 vs. 16 gallons), for longer range between fill-ups.

The RDX 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 QX55 doesn’t offer a cap-less fueling system.

The RDX stops shorter than the QX55:

The RDX has a standard space-saver spare (not available on A-Spec) so you can replace a flat tire and drive to have the flat repaired or replaced. A spare tire isn’t available on the QX55; 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 RDX offers an available driver-adjustable suspension system. It allows the driver to choose between an extra-supple ride, reducing fatigue on long trips, or a sport setting, which allows maximum control for tricky roads or off-road. The QX55’s suspension doesn’t offer adjustable shock absorbers.

The RDX has 3.8 cubic feet more passenger volume than the QX55 (104 vs. 100.2).

The RDX has 2 inches more front legroom, 1.8 inches more front shoulder room and 1.4 inches more rear headroom than the QX55.

The RDX has a much larger cargo volume with its rear seat up than the QX55 with its rear seat up (31.1 vs. 26.9 cubic feet). The RDX has a much larger cargo volume with its rear seat folded than the QX55 with its rear seat folded (79.8 vs. 54.1 cubic feet).

The RDX has a 1500 lbs. towing capacity. The QX55 has no towing capacity.

The power windows standard on both the RDX and the QX55 have locks to prevent small children from operating them. When the lock on the RDX is engaged the driver can still operate all of the windows, for instance to close one opened by a child. The QX55 prevents the driver from operating the other windows just as it does the other passengers.

Both the Acura RDX and Infiniti QX55 offer exterior mirrors that can be folded to provide convenience. The RDX offers available power folding mirrors, which allow for easy, one-touch folding or unfolding at the driver’s discretion. This provides added convenience when maneuvering or parking, as well as when walking past the parked vehicle. In comparison, the QX55’s foldable mirrors are manual, requiring the driver to get out and physically fold them once parked and unfold them before getting in.

Insurance will cost less for the RDX owner. The Complete Car Cost Guide estimates that insurance for the RDX will cost $3125 to $4755 less than the QX55 over a five-year period.

The RDX will cost the buyer less in the long run because of its superior resale value. The IntelliChoice estimates that the RDX will retain 53.7% to 55% of its original price after five years, while the QX55 only retains 46.84% to 46.91%.

IntelliChoice estimates that five-year ownership costs (depreciation, financing, insurance, fuel, fees, repairs and maintenance) for the Acura RDX will be $11847 to $12334 less than for the Infiniti QX55.

The Acura RDX has won recognition from these important consumer publications:

The Acura RDX outsold the Infiniti QX55 by over seven to one during 2023.