2019 Audi S5 Sportback vs. 2019 Infiniti Q70

Detailed Review, Specifications & Comparison

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Safety

For enhanced safety, the front and rear seat shoulder belts of the Audi S5 Sportback have pretensioners to tighten the seatbelts and eliminate dangerous slack in the event of a collision and force limiters to limit the pressure the belts will exert on the passengers. The Infiniti Q70 doesn’t offer pretensioners for the rear seat belts.

The S5 Sportback has standard Secondary Collision Brake Assist, which automatically apply 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 S5 Sportback. But it costs extra on the Q70.

Compared to metal, the S5 Sportback’s plastic fuel tank can withstand harder, more intrusive impacts without leaking; this decreases the possibility of fire. The Infiniti Q70 has a metal gas tank.

Both the S5 Sportback and the Q70 have standard driver and passenger frontal airbags, front side-impact airbags, side-impact head airbags, height-adjustable front shoulder belts, four-wheel antilock brakes, traction control, electronic stability systems to prevent skidding, daytime running lights, rearview cameras, available lane departure warning systems, blind spot warning systems, around view monitors and rear cross-path warning.

Warranty

The S5 Sportback’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 S5 Sportback’s warranty.

Engine

The S5 Sportback’s 3.0 turbo V6 produces 19 more horsepower (349 vs. 330) and 99 lbs.-ft. more torque (369 vs. 270) than the Q70 3.7 LUXE’s standard 3.7 DOHC V6.

As tested in Car and Driver the Audi S5 Sportback is faster than the Infiniti Q70:

 

S5 Sportback

Q70 3.7 LUXE

Q70 5.6 LUXE

Zero to 60 MPH

4.3 sec

5.6 sec

4.7 sec

Zero to 100 MPH

10.9 sec

13.9 sec

11.4 sec

Quarter Mile

12.9 sec

14.1 sec

13.4 sec

Speed in 1/4 Mile

108 MPH

101 MPH

107 MPH

Fuel Economy and Range

On the EPA test cycle the S5 Sportback gets better fuel mileage than the Q70 5.6 LUXE AWD V8 (21 city/30 hwy vs. 16 city/23 hwy).

Regenerative brakes improve the S5 Sportback’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 S5 Sportback’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.

Environmental Friendliness

In its Green Vehicle Guide, the U.S. Environmental Protection Agency (EPA) rates the Audi S5 Sportback higher (5 out of 10) than the Infiniti Q70 (3). This means the S5 Sportback produces up to 16.5 pounds less smog-producing pollutants than the Q70 every 15,000 miles.

Transmission

An eight-speed automatic is standard on the Audi S5 Sportback, for better acceleration and lower engine speed on the highway. Only a seven-speed automatic is available for the Q70.

Brakes and Stopping

For better stopping power the S5 Sportback’s standard brake rotors are larger than those on the Q70:

 

S5 Sportback

Q70

Front Rotors

13.8 inches

12.6 inches

Rear Rotors

13 inches

12.1 inches

The S5 Sportback stops much shorter than the Q70:

 

S5 Sportback

Q70

 

70 to 0 MPH

158 feet

171 feet

Car and Driver

60 to 0 MPH

105 feet

116 feet

Motor Trend

Tires and Wheels

For better traction, the S5 Sportback’s optional tires are larger than the largest tires available on the Q70 (265/30R20 vs. 245/40R20).

The S5 Sportback’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 S5 Sportback’s optional tires have a lower 30 series profile than the Q70’s optional 40 series tires.

Suspension and Handling

The S5 Sportback 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. The Q70’s suspension doesn’t offer adjustable shock absorbers.

The S5 Sportback Prestige handles at .95 G’s, while the Q70 3.7 LUXE pulls only .82 G’s of cornering force in a Car and Driver skidpad test.

The S5 Sportback Prestige executes Motor Trend’s “Figure Eight” maneuver 1.7 seconds quicker than the Q70 5.6 LUXE AWD (25 seconds @ .76 average G’s vs. 26.7 seconds @ .67 average G’s).

Chassis

The S5 Sportback is 9 inches shorter than the Q70, making the S5 Sportback easier to handle, maneuver and park in tight spaces.

As tested by Car and Driver while cruising at 70 MPH, the interior of the S5 Sportback Prestige is quieter than the Q70 3.7 LUXE (70 vs. 73 dB).

Cargo Capacity

The S5 Sportback’s standard rear seats fold to accommodate long and bulky cargo. The Q70 doesn’t offer folding rear seats, only a ski pass-through.

To make loading and unloading groceries and cargo easier when your hands are full, the S5 Sportback’s power liftgate 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

The S5 Sportback Prestige 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 power windows standard on both the S5 Sportback and the Q70 have locks to prevent small children from operating them. When the lock on the S5 Sportback 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 S5 Sportback’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.

Heated windshield washer nozzles are standard on the S5 Sportback to prevent washer fluid and nozzles from freezing and help continue to keep the windshield clear in sub-freezing temperatures. The Q70 doesn’t offer heated windshield washer nozzles.

While driving with high beams on, sensitive light sensors standard on the S5 Sportback Prestige detect other vehicles which could be blinded and automatically switch to low beams. The Q70 doesn’t offer automatic dimming high beams.

Standard smartphone integration for the S5 Sportback allows the driver and passengers access to select programs on their smartphones, including reading text messages aloud, playing internet radio stations, finding fuel prices at nearby service stations, following twitter accounts and other connected activities without taking their eyes off the road or their hands from the wheel. The Q70 doesn’t offer factory integrated smartphone program access.

The S5 Sportback Prestige’s Park Steering Assist can parallel park or back into a parking spot by itself, with the driver only controlling speed with the brake pedal. The Q70 doesn’t offer an automated parking system.

Model Availability

The Audi S5 comes in coupe, convertible and four door hatchback bodystyles; the Infiniti Q70 isn’t available as a coupe or convertible.

Economic Advantages

The S5 Sportback will cost the buyer less in the long run because of its superior resale value. The IntelliChoice estimates that the S5 Sportback will retain 51.38% to 51.57% of its original price after five years, while the Q70 only retains 39.81% to 42.73%.

Recommendations

The Audi A5/S5/RS 5 outsold the Infiniti Q70 by over six to one during the 2018 model year.

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

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