Compare the2025 Audi A3VS 2024 Infiniti Q50

Both the A3 and Q50 have child safety locks to prevent children from opening the rear doors. The A3 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 A3 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 A3 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 A3. But it costs extra on the Q50.

Both the A3 and the Q50 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, crash mitigating brakes, daytime running lights, lane departure warning systems, rearview cameras, available blind spot warning systems, rear parking sensors and rear cross-path warning.

The A3’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 A3’s warranty.

The Audi A3’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.

On the EPA test cycle the A3 gets better mileage than the Q50:

Regenerative brakes improve the A3’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 A3’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.

To lower fuel costs and make buying fuel easier, the Audi A3 uses regular unleaded gasoline (premium recommended for maximum performance). The Q50 requires premium, which can cost on average about 84.9 cents more per gallon.

In its Green Vehicle Guide, the U.S. Environmental Protection Agency (EPA) rates the Audi A3 higher (6 out of 10) than the Infiniti Q50 (3). This means the A3 produces up to 23.4 pounds less smog-producing pollutants than the Q50 every 15,000 miles.

The A3 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 A3 stops shorter than the Q50:

The A3’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 A3 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.

The A3 has standard front and rear gas-charged shocks for better control over choppy roads. The Q50’s suspension doesn’t offer gas-charged shocks.

The A3 Premium Plus handles at .89 G’s, while the Q50 Red Sport 400 AWD pulls only .86 G’s of cornering force in a Motor Trend skidpad test.

For better maneuverability, the A3’s turning circle is .3 feet tighter than the Q50’s (36.4 feet vs. 36.7 feet). The A3’s turning circle is 1 foot tighter than the Q50 AWD’s (36.4 feet vs. 37.4 feet).

The Audi A3 may be more efficient, handle and accelerate better because it weighs about 450 to 550 pounds less than the Infiniti Q50.

The A3 is 1 foot shorter than the Q50, making the A3 easier to handle, maneuver and park in tight spaces.

To make loading and unloading groceries and cargo easier, especially for short adults, the A3 has a standard power trunk, 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.

The A3 has a 3461 lbs. towing capacity. The Q50 has no towing capacity.

The A3’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 A3 and the Q50 have locks to prevent small children from operating them. When the lock on the A3 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 A3 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 A3’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 A3 Prestige has standard headlight washers to keep headlight output high. The Q50 doesn’t offer headlight washers.

To quickly and conveniently keep personal devices charged without cables tangling and wearing out, the Audi A3 offers an optional wireless phone charging system (Qi) in the front center console. The Q50 doesn’t offer wireless personal charging.

The A3’s optional 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.

Insurance will cost less for the A3 owner. The Complete Car Cost Guide estimates that insurance for the A3 will cost $3710 to $9830 less than the Q50 over a five-year period.

The A3 will cost the buyer less in the long run because of its superior resale value. The IntelliChoice estimates that the A3 will retain 48.11% to 50.83% of its original price after five years, while the Q50 only retains 45.32% to 45.77%.

Consumer Reports® recommends both the Audi A3 and the Infiniti Q50, based on reliability, safety and performance.

The Audi A3/S3/RS 3 outsold the Infiniti Q50 by over two to one during 2023.