2019 Audi A5 Sportback vs. 2019 Infiniti Q50

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 Q50 doesn’t offer pretensioners for the rear seat belts.

The A5 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 Q50 doesn’t offer a whiplash protection system.

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 Q50 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 Q50.

Both the A5 Sportback and the Q50 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, crash mitigating brakes, 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 Q50:

 

A5

Q50

 

Passenger

STARS

4 Stars

3 Stars

Chest Compression

1 inches

1 inches

Neck Injury Risk

25%

48%

Neck Stress

119 lbs.

145 lbs.

Neck Compression

47 lbs.

85 lbs.

Leg Forces (l/r)

324/341 lbs.

541/294 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 Q50:

 

A5

Q50

 

Front Seat

STARS

5 Stars

5 Stars

Abdominal Force

219 G’s

262 G’s

Hip Force

308 lbs.

320 lbs.

 

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.

For its top level performance in all IIHS frontal, side, rear impact and roof-crush tests, and its standard front crash prevention system, the Insurance Institute for Highway Safety grants the A5 Sportback the rating of “Top Pick” for 2017, a rating granted to only 139 vehicles tested by the IIHS. The Q50 has not been fully tested, yet.

Warranty

The A5 Sportback’s corrosion warranty is 5 years longer than the Q50’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 Q50’s engines use an aluminum block. Aluminum engine blocks are much more prone to warp and crack at high temperatures than cast iron.

Engine

The A5 Sportback’s 2.0 turbo 4 cyl. produces 40 more horsepower (248 vs. 208) and 15 lbs.-ft. more torque (273 vs. 258) than the Q50 2.0t’s standard 2.0 turbo 4 cyl.

Fuel Economy and Range

On the EPA test cycle the A5 Sportback gets better fuel mileage than the Q50 2.0t AWD (23 city/34 hwy vs. 22 city/28 hwy).

Regenerative brakes improve the A5 Sportback’s fuel efficiency by converting inertia back into energy instead of wasting it. The Q50 doesn’t offer a regenerative braking system.

To lower fuel costs and make buying fuel easier, the Audi A5 Sportback uses regular unleaded gasoline (premium recommended for maximum performance). The Q50 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 Q50 (3). This means the A5 Sportback produces up to 16.5 pounds less smog-producing pollutants than the Q50 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 Q50 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 Q50 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 Q50:

 

A5

Q50

Front Rotors

13.3 inches

12.6 inches

Rear Rotors

13 inches

12.1 inches

The A5 Sportback stops shorter than the Q50:

 

A5

Q50

 

70 to 0 MPH

159 feet

165 feet

Car and Driver

Tires and Wheels

For better traction, the A5 Sportback has larger standard tires than the Q50 (245/40R18 vs. 225/55R17). The A5 Sportback’s optional tires are larger than the largest tires available on the Q50 (255/35R19 vs. 245/40R19).

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 Q50’s standard 55 series tires. The A5 Sportback’s optional tires have a lower 35 series profile than the Q50 Red Sport 400’s 40 series front tires.

For better ride, handling and brake cooling the A5 Sportback has standard 18-inch wheels. Smaller 17-inch wheels are standard on the Q50.

Suspension and Handling

For better handling and stability, the track (width between the wheels) on the A5 Sportback is 2 inches wider in the front and .3 inches wider in the rear than the average track on the Q50.

The A5 Sportback Prestige handles at .94 G’s, while the Q50 Red Sport 400 pulls only .88 G’s of cornering force in a Car and Driver skidpad test.

Chassis

The A5 Sportback is 3.3 inches shorter than the Q50, making the A5 Sportback easier to handle, maneuver and park in tight spaces.

Cargo Capacity

The A5 Sportback has a much larger trunk than the Q50 (21.8 vs. 13.2 cubic feet).

The A5 Sportback’s standard rear seats fold to accommodate long and bulky cargo. The Q50 Pure doesn’t offer folding rear seats.

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 Q50 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 Q50 doesn’t offer a heads-up display.

The power windows standard on both the A5 Sportback and the Q50 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 Q50 prevents the driver from operating the other windows just as it does the other passengers.

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 Q50 doesn’t offer heated windshield washer nozzles.

The A5 Sportback has standard heated front seats. Heated front seats cost extra on the Q50, and aren’t available on the Q50 2.0t. The A5 Sportback Premium Plus/Prestige also offers optional heated rear seats to keep those passengers extremely comfortable in the winter. Heated rear seats aren’t available in the Q50.

Optional air-conditioned seats in the A5 Sportback Premium Plus/Prestige keep the driver and front passenger comfortable and take the sting out of hot seats in summer. The Q50 doesn’t offer air-conditioned seats.

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 Q50 doesn’t offer an automated parking system.

Model Availability

The Audi A5 comes in coupe, convertible and four door hatchback bodystyles; the Infiniti Q50 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 $300 less than the Q50 over a five-year period.

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

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