Compare the2025 Audi A6VS 2024 Infiniti Q50

Safety
Warranty
Engine
Fuel Economy and Range
Environmental Friendliness
Transmission
Brakes and Stopping
Tires and Wheels
Suspension and Handling
Passenger Space
Cargo Capacity
Towing
Ergonomics
Economic Advantages
Recommendations

Safety

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For enhanced safety, the front and rear seat shoulder belts of the Audi A6 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 its rear seat belts.

Both the A6 and Q50 have child safety locks to prevent children from opening the rear doors. The A6 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 Q50’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 Audi A6 has standard driver and front passenger side knee airbags mounted low on the dashboard. These airbags helps prevent the driver and front passenger from sliding under their seatbelts or the main frontal airbags; this keeps them better positioned during a collision for maximum protection. Knee airbags also help keep the legs from striking the dashboard, preventing knee and leg injuries in the case of a serious frontal collision. The Q50 doesn’t offer knee airbags.

The A6 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 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 A6. But it costs extra on the Q50.

Both the A6 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, lane departure warning systems, rearview cameras, available blind spot warning systems, around view monitors and rear cross-path warning.

Warranty

The A6’s corrosion warranty is 5 years longer than the Q50’s (12 vs. 7 years).

There are over 51 percent more Audi dealers than there are Infiniti dealers, which makes it much easier should you ever need service under the A6’s warranty.

Engine

The A6 55 TFSI’s standard 3.0 turbo V6 hybrid produces 19 lbs.-ft. more torque (369 vs. 350) than the Q50 Red Sport 400’s standard 3.0 turbo V6.

Fuel Economy and Range

On the EPA test cycle the A6 gets better mileage than the Q50:

			MPG
A6
	AWD	2.0 turbo 4-cyl. Hybrid	24 city/31 hwy
		3.0 turbo V6 Hybrid	22 city/30 hwy
Q50
	RWD	3.0 turbo V6	20 city/29 hwy
		Red Sport 400 3.0 turbo V6	20 city/26 hwy
	AWD	3.0 turbo V6	19 city/27 hwy
		Red Sport 400 3.0 turbo V6	19 city/26 hwy

Regenerative brakes improve the A6’s fuel efficiency by converting inertia back into energy instead of wasting it. The Q50 doesn’t offer a regenerative braking system.

In heavy traffic or at stoplights the A6’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. If the conditions warrant or the driver wishes, the system can be manually disabled at any time for the duration of a trip. The Q50 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 A6 higher (4 out of 10) than the Infiniti Q50 (3). This means the A6 produces up to 11.3 pounds less smog-producing pollutants than the Q50 every 15,000 miles.

Transmission

The A6 offers an available 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.

Brakes and Stopping

For better stopping power the A6’s standard brake rotors are larger than those on the Q50:

	A6	Q50
Front Rotors	13.3 inches	12.6 inches
Rear Rotors	13 inches	12.1 inches

The A6 stops much shorter than the Q50:

	A6	Q50
60 to 0 MPH	107 feet	123 feet	Motor Trend

Tires and Wheels

For better traction, the A6 has larger standard tires than the Q50 (245/45R19 vs. 225/50R18). The A6’s optional tires are larger than the largest tires available on the Q50 (255/40R20 vs. 245/40R19).

The A6’s standard tires provide better handling because they have a lower 45 series profile (height to width ratio) that provides a stiffer sidewall than the Q50 Luxe’s standard 50 series tires. The A6 55 TFSI’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 A6 has standard 19-inch wheels. Smaller 18-inch wheels are standard on the Q50 Luxe. The A6 55 TFSI’s optional 21-inch wheels are larger than the 19-inch wheels on the Q50 Sensory/Red Sport 400 AWD.

The A6 has a standard space-saver spare tire so you can replace a flat tire and drive to have the flat repaired or replaced. A spare tire isn’t available on the Q50; it requires you to depend on its run-flat tires, which limits mileage and speed before they are repaired. If a run-flat is damaged beyond repair by a road hazard your vehicle will have to be towed.

Suspension and Handling

The A6 has standard front and rear gas-charged shocks for better control over choppy roads. The Q50’s suspension doesn’t offer gas-charged shocks.

For a smoother ride and more stable handling, the A6’s wheelbase is 2.9 inches longer than on the Q50 (115.1 inches vs. 112.2 inches).

For better handling and stability, the track (width between the wheels) on the A6 is 3.7 inches wider in the front and 2.2 inches wider in the rear than the average track on the Q50.

The A6 Prestige handles at .93 G’s, while the Q50 Red Sport 400 AWD pulls only .86 G’s of cornering force in a Motor Trend skidpad test.

The A6 Prestige executes Motor Trend’s “Figure Eight” maneuver quicker than the Q50 Red Sport 400 AWD (24.9 seconds @ .75 average G’s vs. 25.5 seconds @ .73 average G’s).

Passenger Space

The A6 has 1.1 inches more front shoulder room, 1.3 inches more rear headroom, 2.3 inches more rear legroom and .4 inches more rear shoulder room than the Q50.

Cargo Capacity

To make loading and unloading groceries and cargo easier when your hands are full, the A6’s trunk can be opened just by kicking your foot under the back bumper, leaving your hands completely free. The A6 Premium Plus/Prestige also has a standard power trunk, which opens and closes automatically by pressing a button or just by kicking your foot under the back bumper. The Q50 doesn’t offer a power or hands-free opening trunk.

Towing

The A6 has a 3500 lbs. towing capacity. The Q50 has no towing capacity.

Ergonomics

Unlike the driver-only memory system in the Q50, the A6 Prestige has a 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 A6’s instruments include an oil pressure gauge and a temperature gauge - which could save your engine! Often ‘idiot lights’ don’t warn you until damage has been done. The Q50 does not have an oil pressure gauge.

The A6 Prestige has a standard heads-up display that projects speed, warning and navigation instruction 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 A6’s power parking brake sets with one touch and releases with one touch or automatically. The Q50’s parking brake has to be released manually.

The power windows standard on both the A6 and the Q50 have locks to prevent small children from operating them. When the lock on the A6 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.

The A6’s standard Audi Advanced Key allows you to unlock the doors from any outside door handle, open the trunk, and start the engine, all without removing the key from the pocket or purse. Infiniti Intelligent Key standard on the Q50 doesn’t offer a sensor on the rear doors, so you’ll have to reach a front handle to unlock the rear door.

Heated windshield washer nozzles are standard on the A6 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 Insurance Institute for Highway Safety (IIHS) conducts detailed tests on headlights for their range both straight ahead and in curves and to be certain they don’t exceed acceptable amounts of glare to oncoming drivers. The A6’s headlights were rated “Good” by the IIHS, while the Q50’s headlights are rated “Marginal.”

In poor weather, headlights can lose their effectiveness as grime builds up on their lenses. This can reduce visibility without the driver realizing. The A6 Premium Plus/Prestige has standard headlight washers to keep headlight output high. The Q50 doesn’t offer headlight washers.

A power rear sunshade and manual rear side window sunshades are standard in the A6 Prestige to help block heat and glare for the rear passengers. The Q50 doesn’t offer a rear or rear side window sunshades.

Both the A6 and the Q50 have standard heated front seats. The A6 Premium Plus/Prestige also has standard heated rear seats to keep those passengers extremely comfortable in the winter. Heated rear seats aren’t available in the Q50.

Standard air-conditioned seats in the A6 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 A6 Prestige has standard massaging front seats in order to maximize comfort and eliminate fatigue on long trips. Massaging seats aren’t available in the Q50.

To quickly and conveniently keep personal devices charged without cables tangling and wearing out, the Audi A6 offers an optional wireless phone charging system (Qi) in the front center console. The Q50 doesn’t offer wireless personal charging.

The A6 Prestige’s Park Assist Plus can parallel park or back into a parking spot by itself, starting, stopping and changing direction automatically. Remote Park Assist Plus will park and retrieve your car remotely: press a button and watch it park itself. This is ideal for tight locations. The Q50 doesn’t offer an automated parking system.

Economic Advantages

Insurance will cost less for the A6 owner. The Complete Car Cost Guide estimates that insurance for the A6 will cost $1800 less than the Q50 over a five-year period.

According to The Car Book by Jack Gillis, the A6 is less expensive to operate than the Q50 because typical repairs cost much less on the A6 than the Q50, including $121 less for front struts, $96 less for a timing belt/chain and $845 less for a power steering pump.

Recommendations

Consumer Reports® recommends both the Audi A6 and the Infiniti Q50, based on reliability, safety and performance.

The Audi A6/S6/RS 6 outsold the Infiniti Q50 by 34% during 2023.