2019 Audi A5 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 A5 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 A5 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 A5 Sportback. But it costs extra on the Q70.

Compared to metal, the A5 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 A5 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.

The National Highway Traffic Safety Administration does 35 MPH front crash tests on new vehicles. In this test, results indicate that the Audi A5 Sportback is safer than the Infiniti Q70:

 

A5 Sportback

Q70

 

Passenger

STARS

4 Stars

4 Stars

Chest Compression

1 inches

1 inches

Neck Injury Risk

25%

35%

Neck Stress

119 lbs.

166 lbs.

Neck Compression

47 lbs.

65 lbs.

Leg Forces (l/r)

324/341 lbs.

602/540 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 A5 Sportback is safer than the Infiniti Q70:

 

A5 Sportback

Q70

 

Front Seat

STARS

5 Stars

5 Stars

Chest Movement

1.1 inches

1.2 inches

Hip Force

308 lbs.

375 lbs.

 

Rear Seat

STARS

5 Stars

5 Stars

HIC

277

322

 

Into Pole

STARS

5 Stars

5 Stars

Max Damage Depth

12 inches

19 inches

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

Warranty

The A5 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 A5 Sportback’s warranty.

Reliability

The Audi A5 Sportback’s engine uses a cast iron block for durability, while the Q70’s engines use an aluminum block. Aluminum engine blocks are much more prone to warp and crack at high temperatures than cast iron.

Engine

As tested in Car and Driver the Audi A5 Sportback is faster than the Q70 3.7:

 

A5

Q70

Zero to 60 MPH

5.1 sec

5.6 sec

Zero to 100 MPH

13.5 sec

13.9 sec

Quarter Mile

13.7 sec

14.1 sec

Fuel Economy and Range

On the EPA test cycle the A5 Sportback gets better fuel mileage than the Q70 3.7 LUXE AWD (23 city/34 hwy vs. 18 city/24 hwy).

Regenerative brakes improve the A5 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 A5 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.

To lower fuel costs and make buying fuel easier, the Audi A5 Sportback uses regular unleaded gasoline (premium recommended for maximum performance). The Q70 requires premium, which can cost 20 to 55 cents more per gallon.

Environmental Friendliness

In its Green Vehicle Guide, the U.S. Environmental Protection Agency (EPA) rates the Audi A5 Sportback higher (5 out of 10) than the Infiniti Q70 (3). This means the A5 Sportback produces up to 16.5 pounds less smog-producing pollutants than the Q70 every 15,000 miles.

Transmission

The A5 Sportback offers a standard sequential manual gearbox (SMG). With no clutch pedal to worry about and a fully automatic mode, an SMG is much more efficient than a conventional automatic but just as easy to drive. The Q70 doesn’t offer an SMG or a conventional manual transmission.

The A5 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 Q70 doesn’t offer launch control.

Brakes and Stopping

For better stopping power the A5 Sportback’s standard brake rotors are larger than those on the Q70:

 

A5

Q70

Front Rotors

13.3 inches

12.6 inches

Rear Rotors

13 inches

12.1 inches

The A5 Sportback stops much shorter than the Q70:

 

A5

Q70

 

70 to 0 MPH

159 feet

171 feet

Car and Driver

Tires and Wheels

For better traction, the A5 Sportback’s optional tires are larger than the largest tires available on the Q70 (255/35R19 vs. 245/40R20).

The A5 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 A5 Sportback’s optional tires have a lower 35 series profile than the Q70’s optional 40 series tires.

Suspension and Handling

The A5 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 A5 Sportback Prestige handles at .94 G’s, while the Q70 3.7 LUXE pulls only .82 G’s of cornering force in a Car and Driver skidpad test.

Chassis

The A5 Sportback is 9.8 inches shorter than the Q70, making the A5 Sportback easier to handle, maneuver and park in tight spaces.

As tested by Car and Driver, the interior of the A5 Sportback Prestige is quieter than the Q70 3.7 LUXE:

 

A5 Sportback

Q70

At idle

38 dB

39 dB

Full-Throttle

72 dB

77 dB

70 MPH Cruising

64 dB

73 dB

Cargo Capacity

The A5 Sportback has a much larger trunk than the Q70 (21.8 vs. 14.9 cubic feet).

The A5 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, especially for short adults, the A5 Sportback has a standard power liftgate, which opens and closes automatically by pressing a button, or optionally by just kicking your foot under the back bumper, completely leaving your hands free. The Q70 doesn’t offer a power trunk.

Ergonomics

The A5 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 A5 Sportback and the Q70 have locks to prevent small children from operating them. When the lock on the A5 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 A5 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 A5 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 A5 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 A5 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 A5 Sportback Prestige’s Park 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 A5 comes in coupe, convertible and four door hatchback bodystyles; the Infiniti Q70 isn’t available as a coupe or convertible.

Economic Advantages

Insurance will cost less for the A5 Sportback owner. The Complete Car Cost Guide estimates that insurance for the A5 Sportback will cost $1555 less than the Q70 over a five-year period.

The A5 Sportback will cost the buyer less in the long run because of its superior resale value. The IntelliChoice estimates that the A5 Sportback will retain 44.13% to 47.54% of its original price after five years, while the Q70 only retains 39.81% to 42.73%.

IntelliChoice estimates that five-year ownership costs (depreciation, financing, insurance, fuel, fees, repairs and maintenance) for the Audi A5 Sportback will be $9571 to $20416 less than for the Infiniti Q70.

Recommendations

The Audi A5/S5 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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