Compare the2024 Audi A4VS 2022 Acura ILX

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

Safety

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For enhanced safety, the front and rear seat shoulder belts of the Audi A4 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 Acura ILX doesn’t offer pretensioners for its rear seat belts.

The A4’s pre-crash front seatbelts will tighten automatically in the event the vehicle detects an impending crash, improving protection against injury significantly. The ILX doesn’t offer pre-crash pretensioners.

Both the A4 and ILX have child safety locks to prevent children from opening the rear doors. The A4 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 ILX’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 A4 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 ILX doesn’t offer knee airbags.

The A4 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 ILX 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.

The A4 has all-wheel drive to maximize traction under poor conditions, especially in ice and snow. The ILX doesn’t offer all-wheel drive.

The A4 Premium Plus/Prestige has a standard Top and Corner View Cameras to allow the driver to see objects all around the vehicle on a screen. The ILX only offers a rear monitor.

Both the A4 and ILX offer rear cross-traffic warning, but the A4 with Rear Cross-Traffic Assist also has Automatic Brake Activation (automatically applies the brakes) to better prevent a collision when backing near traffic. The ILX’s Rear Cross Traffic Monitor doesn’t automatically brake.

Both the A4 and the ILX have standard driver and passenger frontal airbags, front side-impact airbags, side-impact head airbags, height adjustable front shoulder belts, plastic fuel tanks, four-wheel antilock brakes, traction control, electronic stability systems to prevent skidding, crash mitigating brakes, daytime running lights, lane departure warning systems, rearview cameras and available blind spot warning systems.

The National Highway Traffic Safety Administration does 35 MPH front crash tests on new vehicles. In this test, results indicate that the Audi A4 is safer than the Acura ILX:

	A4	ILX
	Passenger
STARS	4 Stars	4 Stars
Neck Injury Risk	25%	40%
Neck Stress	119 lbs.	166 lbs.
Leg Forces (l/r)	324/341 lbs.	768/623 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 A4 is safer than the Acura ILX:

	A4	ILX
	Front Seat
STARS	5 Stars	5 Stars
HIC	172	234
Hip Force	308 lbs.	487 lbs.
	Rear Seat
STARS	5 Stars	5 Stars
HIC	277	324
Spine Acceleration	56 G’s	64 G’s
	Into Pole
STARS	5 Stars	5 Stars
Max Damage Depth	12 inches	14 inches
Spine Acceleration	47 G’s	56 G’s
Hip Force	666 lbs.	945 lbs.

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

For its top level performance in IIHS driver and passenger-side small overlap frontal, moderate overlap frontal, side impact, roof strength and head restraint tests, its standard vehicle-to-vehicle front crash prevention system, its standard vehicle-to-pedestrian front crash prevention system, and its available headlight’s “Good” rating, the Insurance Institute for Highway Safety grants the A4 the rating of “Top Safety Pick” for 2022, a rating granted to only 174 vehicles tested by the IIHS. The ILX last would have qualified as a “Top Safety Pick” in 2017.

Warranty

The A4’s corrosion warranty is 7 years longer than the ILX’s (12 vs. 5 years).

There are over 12 percent more Audi dealers than there are Acura dealers, which makes it easier should you ever need service under the A4’s warranty.

Reliability

The Audi A4’s engines use a cast iron block for durability, while the ILX’s engine uses an aluminum block. Aluminum engine blocks are much more prone to warp and crack at high temperatures than cast iron.

J.D. Power and Associates’ 2022 survey of the owners of three-year-old vehicles provides the long-term dependability statistics that show that Audi vehicles are more reliable than Acura With 12 fewer problems per 100 vehicles in the first three years of ownership, J.D. Power ranks Audi higher than Acura.

From surveys of all its subscribers, Consumer Reports’ January 2023 Auto Issue reports that Audi vehicles are more reliable than Acura vehicles. Consumer Reports ranks Audi 2 places higher in reliability than Acura.

Engine

The A4 40 TFSI’s standard 2.0 turbo 4-cylinder hybrid produces 56 lbs.-ft. more torque (236 vs. 180) than the ILX’s 2.4 DOHC 4-cylinder. The A4 45 TFSI’s standard 2.0 turbo 4-cylinder hybrid produces 60 more horsepower (261 vs. 201) and 93 lbs.-ft. more torque (273 vs. 180) than the ILX’s 2.4 DOHC 4-cylinder.

As tested in Car and Driver the A4 45 TFSI is faster than the Acura ILX:

	A4	ILX
Zero to 60 MPH	4.8 sec	6.6 sec
Zero to 100 MPH	12.9 sec	17.2 sec
5 to 60 MPH Rolling Start	5.6 sec	7 sec
Quarter Mile	13.5 sec	15.2 sec
Speed in 1/4 Mile	102 MPH	94 MPH

Fuel Economy and Range

On the EPA test cycle the A4 40 TFSI gets better fuel mileage than the ILX (26 city/35 hwy vs. 24 city/34 hwy).

In heavy traffic or at stoplights the A4’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 ILX doesn’t offer an automatic engine start/stop system.

The A4 has 2.1 gallons more fuel capacity than the ILX (15.3 vs. 13.2 gallons), for longer range between fill-ups.

Environmental Friendliness

In its Green Vehicle Guide, the U.S. Environmental Protection Agency (EPA) rates the Audi A4 higher (5 out of 10) than the Acura ILX (3). This means the A4 produces up to 16.5 pounds less smog-producing pollutants than the ILX every 15,000 miles.

Transmission

The A4’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 ILX doesn’t offer launch control.

Brakes and Stopping

For better stopping power the A4 45 TFSI’s brake rotors are larger than those on the ILX:

	A4 40 TFSI	A4 45 TFSI	ILX
Front Rotors	12.4 inches	13.3 inches	12.3 inches
Rear Rotors	11.8 inches	13 inches	11.1 inches

The A4’s standard front and rear disc brakes are vented to help dissipate heat for shorter stops with less fading. The rear discs on the ILX are solid, not vented.

The A4 stops much shorter than the ILX:

	A4	ILX
70 to 0 MPH	149 feet	184 feet	Car and Driver

Tires and Wheels

For better traction, the A4 has larger standard tires than the ILX (225/50R17 vs. 215/45R17). The A4’s optional tires are larger than the largest tires available on the ILX (245/40R18 vs. 225/40R18).

The A4’s optional tires provide better handling because they have a lower 35 series profile (height to width ratio) that provides a stiffer sidewall than the ILX A-SPEC’s 40 series tires.

For better ride, handling and brake cooling the A4 offers optional 19-inch wheels. The ILX’s largest wheels are only 18-inches.

The A4 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 ILX; it requires you to depend on roadside assistance and your vehicle will have to be towed.

Suspension and Handling

For a smoother ride and more stable handling, the A4’s wheelbase is 5.9 inches longer than on the ILX (111 inches vs. 105.1 inches).

For better handling and stability, the track (width between the wheels) on the A4 is 2.5 inches wider in the front and 1 inch wider in the rear than on the ILX.

The A4’s front to rear weight distribution is more even (56% to 44%) than the ILX’s (63% to 37%). This gives the A4 more stable handling and braking.

The A4 Premium Plus handles at .97 G’s, while the ILX A-SPEC pulls only .83 G’s of cornering force in a Car and Driver skidpad test.

Passenger Space

The A4 has 2.7 cubic feet more passenger volume than the ILX (92 vs. 89.3).

The A4 has .3 inches more front shoulder room, 1.5 inches more rear headroom, 1.7 inches more rear legroom and .9 inches more rear shoulder room than the ILX.

Cargo Capacity

A low lift-over trunk design makes loading and unloading the A4 easier. The A4’s trunk lift-over height is 26.9 inches, while the ILX’s liftover is 28.7 inches.

The A4’s standard folding rear seats are split to accommodate bulky cargo. The ILX’s standard single piece folding rear seat is not as flexible; long cargo and a passenger can’t share the rear seat.

To make loading groceries and cargo easier when your hands are full, the A4’s available trunk can be opened just by kicking your foot under the back bumper, leaving your hands completely free. The ILX doesn’t offer a hands-free gesture to open its trunk, forcing you to put cargo down if your hands are full.

Towing

The A4 has a 3968 lbs. towing capacity. The ILX has no towing capacity.

Servicing Ease

The A4 uses gas struts to support the hood for easier service access. The ILX uses a prop rod to support its heavy hood. It takes two hands to open the hood and set the prop rod, the prop rod gets in the way during maintenance and service, and the prop rod could be knocked out, causing the heavy hood to fall on the person maintaining or servicing the car.

The engine in the A4 is mounted longitudinally (North-South), instead of sideways, as in the ILX. This makes it easier to service and maintain, because the accessory belts are in front.

Ergonomics

The A4 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 ILX doesn’t offer a heads-up display.

The A4’s power parking brake sets with one touch and releases with one touch or automatically. The ILX has a lever-type parking brake that has to be strenuously raised to engage properly. It has to be lifted up more and a button depressed to release it.

The power windows standard on both the A4 and the ILX have locks to prevent small children from operating them. When the lock on the A4 is engaged the driver can still operate all of the windows, for instance to close one opened by a child. The ILX prevents the driver from operating the other windows just as it does the other passengers.

The A4’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 ILX’s rear power window switches have to be held the entire time to open or close them fully.

The A4’s rain-sensitive wipers adjust their speed and turn on and off automatically based on the amount of rainfall on the windshield. This allows the driver to concentrate on driving without constantly adjusting the wipers. The ILX’s intermittent wipers change speed with vehicle speed, but can’t turn on and off or change speed based on changing rainfall.

Heated windshield washer nozzles are standard on the A4 to prevent washer fluid and nozzles from freezing and help continue to keep the windshield clear in sub-freezing temperatures. The ILX 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 A4’s available headlights were rated “Good” by the IIHS, while the ILX’s headlights are rated “Poor.”

In poor weather, headlights can lose their effectiveness as grime builds up on their lenses. This can reduce visibility without the driver realizing. The A4 Prestige has standard headlight washers to keep headlight output high. The ILX doesn’t offer headlight washers.

While driving with high beams on, sensitive light sensors standard on the A4 detect other vehicles which could be blinded and automatically switch to low beams. The ILX doesn’t offer automatic dimming high beams.

To help drivers avoid possible obstacles, the A4 has standard cornering lights to illuminate around corners when the turn signals are activated. The ILX doesn’t offer cornering lights.

The A4’s standard rear view mirror and optional side view mirrors have an automatic dimming feature. These mirrors can be set to automatically darken quickly when headlights shine on them, keeping following vehicles from blinding or distracting the driver. The ILX offers an automatic rear view mirror, but its side mirrors don’t dim.

Both the A4 and the ILX have standard heated front seats. The A4 Prestige also has standard heated rear seats to keep those passengers extremely comfortable in the winter. Heated rear seats aren’t available in the ILX.

Optional air-conditioned seats in the A4 (except Premium) keep the driver and front passenger comfortable and take the sting out of hot seats in Summer. The ILX doesn’t offer air-conditioned seats.

On extremely cold winter days, the A4’s optional heated steering wheel provides comfort, allowing the driver to steer safely and comfortably before the car heater warms up. The ILX doesn’t offer a heated steering wheel.

Both the A4 and the ILX offer rear vents. For greater rear passenger comfort, the A4 has standard rear air conditioning vents to keep rear occupants cool in summer or warm in winter. The ILX doesn’t offer rear air conditioning vents, only heat vents.

To quickly and conveniently keep personal devices charged without cables tangling and wearing out, the Audi A4 Premium Plus/Prestige has a standard wireless phone charging system (Qi) in the center console. The ILX doesn’t offer wireless personal charging.

The A4 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 ILX doesn’t offer an automated parking system.

Economic Advantages

Insurance will cost less for the A4 owner. The Car Book by Jack Gillis rates the A4 with a number “5” insurance rate while the ILX is rated higher at a number “10” rate.

According to The Car Book by Jack Gillis, the A4 is less expensive to operate than the ILX because typical repairs cost much less on the A4 than the ILX, including $136 less for fuel injection and $334 less for a power steering pump.

Recommendations

Consumer Reports® recommends the Audi A4, based on reliability, safety and performance.

The Audi A4/S4 outsold the Acura ILX by over two to one during 2022.