Compare the2024 Audi Q8 e-tron SportbackVS 2024 Acura RDX

Safety
Warranty
Reliability
Engine
Fuel Economy and Range
Environmental Friendliness
Transmission
Brakes and Stopping
Tires and Wheels
Suspension and Handling
Chassis
Passenger Space
Towing
Ergonomics

Safety

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The Q8 e-tron Sportback’s pre-crash front seatbelts will tighten automatically in the event the vehicle detects an impending crash, improving protection against injury significantly. The RDX doesn’t offer pre-crash pretensioners.

Both the Q8 e-tron Sportback and RDX have child safety locks to prevent children from opening the rear doors. The Q8 e-tron Sportback has power child safety locks, allowing the driver to activate and deactivate them from the driver's seat and to know when they're engaged. The RDX’s child locks have to be individually engaged at each rear door with a manual switch. The driver can’t know the status of the locks without opening the doors and checking them.

The Q8 e-tron Sportback’s standard pretensioning seatbelts also sense rear collisions and remove slack from the seatbelts to help protect the occupants from whiplash and other injuries. The RDX doesn’t offer a whiplash protection system.

The Q8 e-tron Sportback has a standard Secondary Collision Brake Assist, which automatically applies the brakes in the event of a crash to help prevent secondary collisions and prevent further injuries. The RDX doesn’t offer a post collision braking system: in the event of a collision that triggers the airbags, more collisions are possible without the protection of airbags that may have already deployed.

Earlier warning of stopped traffic, traffic signals, dangerous road conditions, weather, or accidents, can keep driver's safer and prevent crashes. The Q8 e-tron Sportback has Car-to-X Services, a system that seemlesly communicates important warnings to the driver about impending danger, if they're available. The RDX doesn’t offer a system that can receive automated systems from infrastructure.

Both the Q8 e-tron Sportback and RDX have rear cross-traffic warning, but the Q8 e-tron Sportback has Automatic Brake Activation (automatically applies the brakes) to better prevent a collision when backing near traffic. The RDX’s Rear Cross Traffic Monitor doesn’t automatically brake.

Both the Q8 e-tron Sportback and the RDX 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, 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 Audi Q8 e-tron Sportback weighs 1740 to 1784 pounds more than the Acura RDX. The NHTSA advises that heavier vehicles are much safer in collisions than their significantly lighter counterparts.

The National Highway Traffic Safety Administration does 35 MPH front crash tests on new vehicles. In this test, results indicate that the Audi Q8 e-tron Sportback is safer than the Acura RDX:

	Q8 e-tron Sportback	RDX
	Driver
STARS	4 Stars	4 Stars
HIC	212	300
Neck Injury Risk	23%	26%
Neck Stress	253 lbs.	262 lbs.
Neck Compression	16 lbs.	23 lbs.
Leg Forces (l/r)	137/335 lbs.	328/464 lbs.
	Passenger
STARS	4 Stars	4 Stars
HIC	323	353
Chest Compression	.5 inches	.6 inches
Neck Compression	67 lbs.	84 lbs.
Leg Forces (l/r)	244/319 lbs.	362/441 lbs.

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

The National Highway Traffic Safety Administration does side impact tests on new vehicles. In this test, which crashes the vehicle into a flat barrier at 38.5 MPH and into a post at 20 MPH, results indicate that the Audi Q8 e-tron Sportback is safer than the Acura RDX:

	Q8 e-tron Sportback	RDX
	Front Seat
STARS	5 Stars	5 Stars
HIC	44	63
Abdominal Force	117 lbs.	130 lbs.
	Rear Seat
STARS	5 Stars	5 Stars
HIC	123	124
Spine Acceleration	44 G’s	52 G’s
	Into Pole
STARS	5 Stars	5 Stars
Max Damage Depth	8 inches	11 inches
HIC	279	486
Hip Force	631 lbs.	704 lbs.

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

Instrumented handling tests conducted by the National Highway Traffic Safety Administration and analysis of its dimensions indicate that the Q8 e-tron Sportback, with its five-star roll-over rating, is 5.8% less likely to roll over than the RDX, which received a four-star rating.

Warranty

The Q8 e-tron Sportback’s corrosion warranty is 7 years longer than the RDX’s (12 vs. 5 years).

There are over 12 percent more Audi dealers than there are Acura dealers, which makes it easier should you ever need service under the Q8 e-tron Sportback’s warranty.

Reliability

J.D. Power and Associates’ 2022 survey of the owners of three-year-old vehicles provides the long-term dependability statistics that show that Audi vehicles are more reliable than Acura With 12 fewer problems per 100 vehicles in the first three years of ownership, J.D. Power ranks Audi higher than Acura.

Engine

The Q8 e-tron Sportback’s standard electric motors produces 130 more horsepower (402 vs. 272) and 210 lbs.-ft. more torque (490 vs. 280) than the RDX’s 2.0 turbo 4-cylinder. The SQ8 e-tron Sportback’s standard electric motors produces 224 more horsepower (496 vs. 272) and 437 lbs.-ft. more torque (717 vs. 280) than the RDX’s 2.0 turbo 4-cylinder.

As tested in Motor Trend the Audi Q8 e-tron Sportback (base engine) is faster than the Acura RDX:

	Q8 e-tron Sportback	RDX
Zero to 30 MPH	2.3 sec	2.6 sec
Zero to 60 MPH	5.2 sec	7.1 sec
Zero to 80 MPH	8.3 sec	11.8 sec
Passing 45 to 65 MPH	2.3 sec	3.6 sec
Quarter Mile	13.9 sec	15.5 sec
Speed in 1/4 Mile	101.6 MPH	90.7 MPH

Fuel Economy and Range

On the EPA test cycle the Q8 e-tron Sportback gets better mileage than the RDX:

			MPGe
Q8 e-tron Sportback
	AWD	Electric Motors	84 city/90 hwy
		ultra Electric Motors	84 city/89 hwy
		SQ8 Electric Motors	72 city/75 hwy
RDX
			MPG
	AWD	2.0 turbo 4-cyl.	21 city/27 hwy
		A-Spec 2.0 turbo 4-cyl.	21 city/26 hwy

The Q8 e-tron Sportback can travel with zero emissions for 253 to 300 miles (dependent on model). The RDX can’t move without running its internal combustion engine.

Regenerative brakes improve the Q8 e-tron Sportback’s fuel efficiency by converting inertia back into energy instead of wasting it. The RDX doesn’t offer a regenerative braking system.

Environmental Friendliness

In its Green Vehicle Guide, the U.S. Environmental Protection Agency (EPA) rates the Audi Q8 e-tron Sportback higher (10 out of 10) than the Acura RDX (6). This means the Q8 e-tron Sportback produces up to 12.9 pounds less smog-producing pollutants than the RDX every 15,000 miles.

Transmission

The Q8 e-tron Sportback’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 RDX doesn’t offer launch control.

Brakes and Stopping

For better stopping power the Q8 e-tron Sportback’s brake rotors are larger than those on the RDX:

	Q8 e-tron Sportback	RDX
Front Rotors	15.7 inches	12.4 inches
Rear Rotors	13.8 inches	12.2 inches

The Q8 e-tron Sportback’s standard front and rear disc brakes are vented to help dissipate heat for shorter stops with less fading. The rear discs on the RDX are solid, not vented.

The Q8 e-tron Sportback stops much shorter than the RDX:

	Q8 e-tron Sportback	RDX
60 to 0 MPH	104 feet	133 feet	Motor Trend

Tires and Wheels

For better traction, the Q8 e-tron Sportback has larger standard tires than the RDX (255/50R20 vs. 235/55R19). The Q8 e-tron Sportback Premium Plus/Prestige’s optional tires are larger than the largest tires available on the RDX (265/45R21 vs. 255/45R20).

The Q8 e-tron Sportback’s optional tires provide better handling because they have a lower 40 series profile (height to width ratio) that provides a stiffer sidewall than the RDX A-Spec’s 45 series tires.

For better ride, handling and brake cooling the Q8 e-tron Sportback offers optional 22-inch wheels. The RDX’s largest wheels are only 20-inches.

Suspension and Handling

The front and rear suspension of the Q8 e-tron Sportback uses air springs for a smoother, controlled ride than the RDX, which uses coil springs. Air springs maintain proper ride height and ride more smoothly.

The Q8 e-tron Sportback has a standard automatic front and rear load leveling suspension to keep ride height level with a heavy load or when towing. The Q8 e-tron Sportback’s height leveling suspension allows the driver to raise ride height for better off-road clearance and then lower it again for easier entering and exiting and better on-road handling. The RDX doesn’t offer a load leveling suspension.

For a smoother ride and more stable handling, the Q8 e-tron Sportback’s wheelbase is 6.8 inches longer than on the RDX (115.1 inches vs. 108.3 inches).

The Q8 e-tron Sportback handles at .92 G’s, while the RDX pulls only .81 G’s of cornering force in a Motor Trend skidpad test.

The Q8 e-tron Sportback executes Motor Trend’s “Figure Eight” maneuver 2.3 seconds quicker than the RDX (25.4 seconds @ .75 average G’s vs. 27.7 seconds @ .62 average G’s).

Chassis

The front grille of the Q8 e-tron Sportback uses electronically controlled shutters to close off airflow and reduce drag when less engine cooling is needed. This helps improve highway fuel economy. The RDX doesn’t offer active grille shutters.

Passenger Space

The Q8 e-tron Sportback has .7 inches more rear legroom and .6 inches more rear shoulder room than the RDX.

Towing

Maximum trailer towing in the Acura RDX is limited to 1500 pounds. The Q8 e-tron Sportback offers up to a 4000 lbs. towing capacity.

Ergonomics

Unlike the driver-only memory system in the RDX, the Q8 e-tron Sportback Prestige has a passenger memory, so that when drivers switch, the memory setting adjusts the driver’s seat, steering wheel position and outside mirror angle and the front passenger seat also adjusts to the new passenger’s preset preferences.

The Q8 e-tron Sportback’s standard Audi Advanced Key allows you to unlock the doors from any outside door handle, open the cargo door, and start the vehicle, all without removing the key from the pocket or purse. Smart Entry standard on the RDX doesn’t offer a sensor on the rear doors, so you’ll have to reach a front handle to unlock the rear door.

The Q8 e-tron Sportback’s rain-sensitive wipers adjust their speed and turn on and off automatically based on the amount of rainfall on the windshield. This allows the driver to concentrate on driving without constantly adjusting the wipers. The RDX’s standard intermittent wipers change speed with vehicle speed, but can’t turn on and off or change speed based on changing rainfall.

Manual rear side window sunshades are available in the Q8 e-tron Sportback to help block heat and glare for the rear passengers. The RDX doesn’t offer rear side window sunshades.

The Q8 e-tron Sportback’s standard rear and side view mirrors have an automatic dimming feature. These mirrors can be set to automatically darken quickly when headlights shine on them, keeping following vehicles from blinding or distracting the driver. The RDX has an automatic rear view mirror, but its side mirrors don’t dim.

Standard air conditioned seats in the front and rear seats keep the Q8 e-tron Sportback Premium Plus/Prestige’s passengers comfortable and take the sting out of hot leather in summer. The RDX doesn’t offer air-conditioned seats in the rear.

The Q8 e-tron Sportback has a standard heated steering wheel to take the chill out of steering on extremely cold winter days before the vehicle heater warms up. A heated steering wheel costs extra on the RDX.

The Q8 e-tron Sportback Prestige has standard massaging front seats in order to maximize comfort and eliminate fatigue on long trips. Massaging seats aren’t available in the RDX.

The Q8 e-tron Sportback Prestige/Launch Assist’s Intelligent Park Assist can parallel park or back into a parking spot by itself, with the driver only controlling speed with the brake pedal. The RDX doesn’t offer an automated parking system.

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