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Both the RDX and the Allroad 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, traction control, electronic stability systems to prevent skidding, crash mitigating brakes, daytime running lights, rearview cameras, available all wheel drive, blind spot warning systems, around view monitors and rear cross-path warning.
For its top level performance in IIHS driver and passenger-side small overlap frontal, moderate overlap frontal, side impact, roof strength and head restraint tests, its standard front crash prevention system, and its headlight’s “Good” rating, the Insurance Institute for Highway Safety grants the RDX its highest rating: “Top Pick Plus” for 2019, a rating granted to only 36 vehicles tested by the IIHS. The Allroad was last qualified as only a standard “Top Pick” in 2017.
Acura’s powertrain warranty covers the RDX 2 years and 20,000 miles longer than Audi covers the Allroad. Any repair needed on the engine, transmission, axles, joints or driveshafts is fully covered for 6 years or 70,000 miles. Coverage on the Allroad ends after only 4 years or 50,000 miles.
J.D. Power and Associates’ 2018 Initial Quality Study of new car owners surveyed provide the statistics that show that Acura vehicles are better in initial quality than Audi vehicles. J.D. Power ranks Acura 20th in initial quality. With 6 more problems per 100 vehicles, Audi is ranked 25th.
The RDX’s 2.0 turbo 4 cyl. produces 24 more horsepower (272 vs. 248) and 7 lbs.-ft. more torque (280 vs. 273) than the Allroad’s 2.0 turbo 4 cyl.
The RDX has 1.8 gallons more fuel capacity than the Allroad (17.1 vs. 15.3 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 Allroad doesn’t offer a cap-less fueling system.
In its Green Vehicle Guide, the U.S. Environmental Protection Agency (EPA) rates the Acura RDX higher (6 out of 10) than the Audi Allroad (5). This means the RDX produces up to 6.9 pounds less smog-producing pollutants than the Allroad every 15,000 miles.
A 10-speed automatic is standard on the Acura RDX, for better acceleration and lower engine speed on the highway. Only a seven-speed automatic is available for the Allroad.
The RDX stops shorter than the Allroad:
60 to 0 MPH
For better traction, the RDX A-Spec’s tires are larger than the largest tires available on the Allroad (255/40R20 vs. 245/45R18).
The RDX A-Spec’s tires provide better handling because they have a lower 40 series profile (height to width ratio) that provides a stiffer sidewall than the Allroad’s 45 series tires.
For better ride, handling and brake cooling the RDX has standard 19-inch wheels. Only 18-inch wheels are available on the Allroad. The RDX A-Spec has standard 20-inch wheels.
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 Allroad doesn’t offer vehicle monitored tire inflation.
For better handling and stability, the track (width between the wheels) on the RDX is 2.1 inches wider in the front and 3 inches wider in the rear than on the Allroad.
For greater off-road capability the RDX has a 1.7 inches greater minimum ground clearance than the Allroad (8.2 vs. 6.5 inches), allowing the RDX to travel over rougher terrain without being stopped or damaged.
The RDX uses computer-generated active noise cancellation to help remove annoying noise and vibration from the passenger compartment, especially at low frequencies. The Allroad doesn’t offer active noise cancellation.
The RDX has 12 cubic feet more passenger volume than the Allroad (104 vs. 92).
The RDX has .5 inches more front headroom, .3 inches more front legroom, 3.8 inches more front shoulder room, .9 inches more rear headroom, 2.7 inches more rear legroom and 2.1 inches more rear shoulder room than the Allroad.
The RDX has a much larger cargo volume with its rear seat up than the Allroad with its rear seat up (31.1 vs. 24.2 cubic feet). The RDX has a much larger cargo volume with its rear seat folded than the Allroad with its rear seat folded (79.8 vs. 58.5 cubic feet).
Pressing a switch automatically lowers the RDX’s rear seats, to make changing between passengers and cargo easier. The Allroad doesn’t offer automatic folding seats.
The RDX 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 Allroad doesn’t offer a remote starting system.
The RDX’s standard easy entry system glides the driver’s seat back, making it easier for the driver to get in and out. The Allroad doesn’t offer an easy entry system.
If the windows are left open on the RDX the driver can close them all at the outside door handle or from a distance using the remote. On a hot day the driver can lower the windows from a distance using the keyless remote. The driver of the Allroad can’t use the remote to operate the windows.
To improve rear visibility by keeping the rear window clear, the RDX has a standard rear fixed intermittent wiper with a full on position. The rear wiper standard on the Allroad only has an intermittent setting, so in a hard rain visibility isn’t as good.
The Insurance Institute for Highway Safety (IIHS) conducts detailed tests on headlights for their range both straight ahead and in curves and to be certain they don’t exceed acceptable amounts of glare to oncoming drivers. The RDX’s available headlights were rated “Acceptable” by the IIHS, while the Allroad’s headlights are rated “Marginal.”
When the RDX is put in reverse, both rearview mirrors tilt from their original position. This gives the driver a better view of the curb during parallel parking maneuvers. Shifting out of reverse puts the mirrors into their original positions. The Allroad’s mirrors don’t automatically adjust for backing.
The RDX is available in both front-wheel drive and four-wheel drive configurations. The Allroad doesn’t offer a two-wheel drive configuration.
Insurance will cost less for the RDX owner. The Complete Car Cost Guide estimates that insurance for the RDX will cost $2540 to $3575 less than the Allroad 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 51.89% to 53.05% of its original price after five years, while the Allroad only retains 50.32% to 50.79%.
IntelliChoice estimates that five-year ownership costs (depreciation, financing, insurance, fuel, fees, repairs and maintenance) for the Acura RDX will be $10467 to $10494 less than for the Audi Allroad.
The Car Book by Jack Gillis recommends the Acura RDX, based on economy, maintenance, safety and complaint levels.
The Acura RDX outsold the Audi A4/S4 by 84% during 2018.
© 1991-2018 Advanta-STAR Automotive Research. All rights reserved.
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