Compare the2024 Acura RDXVS 2023 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:

For its performance in IIHS driver-side and passenger-side small overlap frontal, moderate overlap frontal, updated side impact, headlight, daytime pedestrian crash prevention, and nighttime pedestrian crash prevention testing, the Insurance Institute for Highway Safety grants the RDX its highest rating: “Top Safety Pick Plus” for 2023, a rating granted to only 36 vehicles tested by the IIHS. The QX55 has not been fully tested, yet.

There are over 33 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 12 points higher than the QX55.

J.D. Power and Associates’ 2023 Initial Quality Study of new car owners surveyed provide the statistics that show that Acura vehicles are better in initial quality than Infiniti vehicles. With 5 fewer problems per 100 vehicles, JD Power ranks Acura higher than Infiniti.

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

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 82.8 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 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 QX55 doesn’t offer vehicle monitored tire inflation.

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.

J.D. Power and Associates surveys of service recipients show that Acura service is better than Infiniti. J.D. Power ranks Acura 6th in service department satisfaction (above the industry average). With a 9% lower rating, Infiniti is ranked 9th.

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 RDX and the QX55 have standard heated front seats. The RDX Advance also has standard heated rear seats to keep those passengers extremely comfortable in the winter. Heated rear seats aren’t available in the QX55.

To quickly and conveniently keep personal devices charged without cables tangling and wearing out, the Acura RDX offers an optional wireless phone charging system (Qi) in the center console. The QX55 doesn’t offer wireless personal charging.

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

The Acura RDX outsold the Infiniti QX55 by almost five to one during 2022.