2020 Audi S8 vs. 2019 Infiniti Q70

Detailed Review, Specifications & Comparison

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Safety

© 1999 - 2020 Advanta-STAR Automotive Research. All rights reserved. This vehicle comparison and all of the content in it are provided only by license from Advanta-STAR Automotive Research Corporation of America. If you are not a legally licensed user of this vehicle comparison, it is against federal law to access it, copy it, forward it or use it in any manner whatsoever. Any unauthorized use of this vehicle comparison is a violation of U.S. and international law and is punishable criminally and civilly. 6IUEX-0KENZ 45.55.47.189 2020/03/30

Both the S8 and Q70 have child safety locks to prevent children from opening the rear doors. The S8 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 Q70’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 S8 has a standard front seat center airbag, which deploys between the driver and front passenger, protecting them from injuries caused by striking each other in serious side impacts. The Q70 doesn’t offer front seat center airbags.

The S8 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 Q70 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 S8. But it costs extra on the Q70.

A passive infrared night vision system optional on the S8 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 and even aims one of the vehicle’s headlights in the direction of the person or object. The Q70 doesn’t offer a night vision system.

Both the S8 and the Q70 have standard driver and passenger frontal airbags, front side-impact airbags, side-impact head airbags, front seatbelt pretensioners, height adjustable front shoulder belts, four-wheel antilock brakes, traction control, electronic stability systems to prevent skidding, daytime running lights, around view monitors, available blind spot warning systems and rear cross-path warning.

The Audi S8 weighs 974 to 1426 pounds more than the Infiniti Q70. The NHTSA advises that heavier cars are much safer in collisions than their significantly lighter counterparts.

Warranty

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The S8’s corrosion warranty is 5 years longer than the Q70’s (12 vs. 7 years).

There are over 42 percent more Audi dealers than there are Infiniti dealers, which makes it easier should you ever need service under the S8’s warranty.

Reliability

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J.D. Power and Associates’ 2019 survey of the owners of three-year-old vehicles provides the long-term dependability statistics that show that Audi vehicles are more reliable than Infiniti vehicles. J.D. Power ranks Audi 8th in reliability, above the industry average. With 4 more problems per 100 vehicles, Infiniti is ranked 11th.

Engine

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The S8’s 4.0 turbo V8 hybrid produces 233 more horsepower (563 vs. 330) and 320 lbs.-ft. more torque (590 vs. 270) than the Q70 3.7 LUXE’s standard 3.7 DOHC V6. The S8’s 4.0 turbo V8 hybrid produces 143 more horsepower (563 vs. 420) and 173 lbs.-ft. more torque (590 vs. 417) than the Q70 5.6 LUXE’s standard 5.6 DOHC V8.

Fuel Economy and Range

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Regenerative brakes improve the S8’s fuel efficiency by converting inertia back into energy instead of wasting it. The Q70 doesn’t offer a regenerative braking system.

In heavy traffic or at stoplights the S8’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. (Start/Stop isn’t accounted in present EPA fuel mileage tests.) The Q70 doesn’t offer an automatic engine start/stop system.

The S8 has 1.7 gallons more fuel capacity than the Q70 (21.7 vs. 20 gallons), for longer range between fill-ups.

Transmission

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An eight-speed automatic is standard on the Audi S8, for better acceleration and lower engine speed on the highway. Only a seven-speed automatic is available for the Q70.

Brakes and Stopping

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For better stopping power the S8’s brake rotors are larger than those on the Q70:

S8

S8 opt.

Q70

Q70 Sport

Front Rotors

15.8 inches

16.5 inches

12.6 inches

14 inches

Rear Rotors

13.8 inches

14.6 inches

12.1 inches

13.8 inches

The S8 offers optional heat-treated ceramic brake rotors, which last ten to twenty times as long as conventional cast iron rotors, don’t rust, don’t fade during repeated high speed braking, and their lighter weight contribute to better braking, handling and acceleration. The Q70 doesn’t offer ceramic brake rotors.

Tires and Wheels

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For better traction, the S8 has larger tires than the Q70 (265/40R20 vs. 245/40R20).

The S8’s standard tires provide better handling because they have a lower 40 series profile (height to width ratio) that provides a stiffer sidewall than the Q70’s standard 50 series tires. The S8’s optional tires have a lower 35 series profile than the Q70’s optional 40 series tires.

For better ride, handling and brake cooling the S8 has standard 20-inch wheels. Smaller 18-inch wheels are standard on the Q70. The S8’s optional 21-inch wheels are larger than the 20-inch wheels optional on the Q70.

Suspension and Handling

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The front and rear suspension of the S8 uses air springs for a smoother, controlled ride than the Q70, which uses coil springs. Air springs maintain proper ride height and ride more smoothly.

The S8 has a standard 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. The Q70’s suspension doesn’t offer adjustable shock absorbers.

The S8 has a standard automatic front and rear load leveling suspension to keep ride height level with a heavy load or when towing. The S8’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 Q70 doesn’t offer a load leveling suspension.

For a smoother ride and more stable handling, the S8’s wheelbase is 9 inches longer than on the Q70 (123.2 inches vs. 114.2 inches). The S8’s wheelbase is 3.1 inches longer than on the Q70L (123.2 inches vs. 120.1 inches).

For better handling and stability, the track (width between the wheels) on the S8 is 2.1 inches wider in the front and 2 inches wider in the rear than the average track on the Q70.

Passenger Space

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The S8 has .7 inches more front shoulder room, .8 inches more rear headroom, 8.1 inches more rear legroom and .9 inches more rear shoulder room than the Q70.

For enhanced passenger comfort on long trips the S8’s available rear seats recline. The Q70’s rear seats don’t recline.

Cargo Capacity

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A low lift-over trunk design makes loading and unloading the S8 easier. The S8’s trunk lift-over height is 27.4 inches, while the Q70’s liftover is 29.1 inches.

To make loading and unloading groceries and cargo easier when your hands are full, the S8’s power trunk can be opened or closed just by kicking your foot under the back bumper, leaving your hands completely free. The Q70 doesn’t offer a power or hands-free opening trunk.

Ergonomics

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Unlike the driver-only memory system in the Q70, the S8 has standard driver and 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 S8 has a standard heads-up display that projects speed and other key instrumentation readouts in front of the driver’s line of sight, allowing drivers to view information without diverting their eyes from the road. The Q70 doesn’t offer a heads-up display.

The S8’s power parking brake sets with one touch and releases with one touch or automatically. The Q70’s parking brake has to released manually.

The power windows standard on both the S8 and the Q70 have locks to prevent small children from operating them. When the lock on the S8 is engaged the driver can still operate all of the windows, for instance to close one opened by a child. The Q70 prevents the driver from operating the other windows just as it does the other passengers.

The S8’s front and rear power windows all open or close fully with one touch of the switches, making it more convenient at drive-up windows and toll booths, or when talking with someone outside the car. The Q70’s rear power window switches have to be held the entire time to open or close them fully.

In poor weather, headlights can lose their effectiveness as grime builds up on their lenses. This can reduce visibility without the driver realizing. The S8 offers available headlight washers to keep headlight output high. The Q70 doesn’t offer headlight washers.

While driving with high beams on, sensitive light sensors standard on the S8 detect other vehicles which could be blinded and automatically switch to low beams. The Q70 doesn’t offer automatic dimming high beams.

The S8 has standard front air-conditioned seats and offers them optionally in the rear. This keeps the passengers comfortable and takes the sting out of hot seats in summer. The Q70 doesn’t offer air-conditioned seats in the rear.

The S8 has a standard heated steering wheel to take the chill out of steering on extremely cold winter days before the car heater warms up. A heated steering wheel costs extra on the Q70.

The S8 has standard massaging front and optional massaging rear seats. Massaging seats aren’t available in the Q70.

To quickly and conveniently keep personal devices charged without cables tangling and wearing out, the Audi S8 has a standard wireless phone charging system (Qi) in the center console. The Q70 doesn’t offer wireless personal charging.

The S8 offers an optional 115-volt a/c outlet on the center console, allowing you to recharge a laptop or run small household appliances without special adapters that can break or get misplaced. The Q70 doesn’t offer a house-current electrical outlet.

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