2019 Audi Q8 vs. 2019 Lexus RX Series

Detailed Review, Specifications & Comparison

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

Both the Q8 and RX Series have child safety locks to prevent children from opening the rear doors. The Q8 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 RX Series’ 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 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 RX Series 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.

To provide maximum traction and stability on all roads, All-Wheel Drive is standard on the Q8. But it costs extra on the RX Series.

A passive infrared night vision system optional on the Q8 Prestige helps the driver to more easily detect people, animals or other objects in front of the vehicle at night. Using an infrared camera to detect heat, the system then displays the image on a monitor in the dashboard. The RX Series doesn’t offer a night vision system.

Both the Q8 and the RX Series have standard driver and passenger frontal airbags, front side-impact airbags, side-impact head airbags, front and rear seatbelt pretensioners, height adjustable front shoulder belts, four-wheel antilock brakes, traction control, electronic stability systems to prevent skidding, crash mitigating brakes, rearview cameras, available lane departure warning systems, blind spot warning systems, around view monitors and rear cross-path warning.


The Q8’s corrosion warranty is 6 years longer than the RX Series’ (12 vs. 6 years).

There are over 26 percent more Audi dealers than there are Lexus dealers, which makes it easier should you ever need service under the Q8’s warranty.


The Q8’s 3.0 turbo V6 hybrid produces 40 more horsepower (335 vs. 295) and 101 lbs.-ft. more torque (369 vs. 268) than the RX 350’s standard 3.5 DOHC V6. The Q8’s 3.0 turbo V6 hybrid produces 27 more horsepower (335 vs. 308) than the RX 450h’s standard 3.5 DOHC V6 hybrid.

Fuel Economy and Range

To lower fuel costs and make buying fuel easier, the Audi Q8 uses regular unleaded gasoline (premium recommended for maximum performance). The RX 450h requires premium, which can cost 20 to 55 cents more per gallon.

The Q8 has 5.3 gallons more fuel capacity than the RX Series Hybrid’s standard fuel tank (22.5 vs. 17.2 gallons), for longer range between fill-ups. The Q8 has 3.3 gallons more fuel capacity than the RX Series’ standard fuel tank (22.5 vs. 19.2 gallons).

Brakes and Stopping

For better stopping power the Q8’s brake rotors are larger than those on the RX Series:



RX Series

Front Rotors

14.8 inches

12.9 inches

Rear Rotors

13.8 inches

13.3 inches

Tires and Wheels

For better traction, the Q8 has larger standard tires than the RX Series (275/50R20 vs. 235/65R18). The Q8’s optional tires are larger than the largest tires available on the RX Series (285/45R21 vs. 235/65R18).

The Q8’s standard tires provide better handling because they have a lower 50 series profile (height to width ratio) that provides a stiffer sidewall than the RX Series’ standard 65 series tires. The Q8’s optional tires have a lower 40 series profile than the RX Series’ optional 55 series tires.

For better ride, handling and brake cooling the Q8 has standard 20-inch wheels. Smaller 18-inch wheels are standard on the RX Series. The Q8’s optional 22-inch wheels are larger than the 20-inch wheels optional on the RX Series.

Suspension and Handling

For a smoother ride and more stable handling, the Q8’s wheelbase is 8.1 inches longer than on the RX Series (117.9 inches vs. 109.8 inches).

For better handling and stability, the track (width between the wheels) on the Q8 is 1.7 inches wider in the front and 2.8 inches wider in the rear than on the RX Series.

Passenger Space

The Q8 has 1.7 inches more front shoulder room, 2.2 inches more rear legroom and .9 inches more rear shoulder room than the RX Series.

Cargo Capacity

The Q8 has a much larger cargo volume with its rear seat up than the RX Series with its rear seat up (28.6 vs. 18.4 cubic feet). The Q8 has a much larger cargo volume with its rear seat folded than the RX Series with its rear seat folded (67.5 vs. 56.3 cubic feet).


The Q8’s standard towing capacity is much higher than the RX Series’ (7700 vs. 0 pounds).

Servicing Ease

The engine in the Q8 is mounted longitudinally (North-South), instead of sideways, as in the RX Series. This makes it easier to service and maintain, because there are no rear spark plugs and the accessory belts are in front.


Unlike the driver-only memory system optional at extra cost in the RX Series, the Q8 offers an optional 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.

A manual rear sunshade is optional in the Q8 to help block heat and glare for the rear passengers. The RX Series doesn’t offer a rear sunshade.

© 1991-2018 Advanta-STAR Automotive Research. All rights reserved.

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