Compare the2024 Audi A4VS 2024 Acura TLX

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

Safety

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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 TLX doesn’t offer pre-crash pretensioners.

Both the A4 and TLX 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 TLX’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 A4 has a standard Audi Backguard System, which use a specially designed headrest to protect the driver and front passenger from whiplash. During a rear-end collision, the Audi Backguard System moves the headrests forward to prevent neck and spine injuries. At the same time the pretensioning seatbelts fire, removing slack from the belts. The TLX doesn’t offer a whiplash protection system.

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 TLX 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 A4. But it costs extra on the TLX.

Both the A4 and TLX 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 TLX’s Rear Cross Traffic Monitor doesn’t automatically brake.

Both the A4 and the TLX have standard driver and passenger frontal airbags, front side-impact airbags, driver and front passenger knee airbags, side-impact head airbags, front and rear 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 and around view monitors.

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 TLX:

	A4	TLX
	Passenger
STARS	4 Stars	4 Stars
HIC	236	358
Neck Injury Risk	25%	32%
Neck Stress	119 lbs.	186 lbs.
Neck Compression	47 lbs.	66 lbs.
Leg Forces (l/r)	324/341 lbs.	416/473 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 post at 20 MPH, results indicate that the Audi A4 is safer than the Acura TLX:

	A4	TLX
	Into Pole
STARS	5 Stars	5 Stars
Max Damage Depth	12 inches	12 inches
HIC	333	464

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

Warranty

The A4’s corrosion warranty is 7 years longer than the TLX’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 TLX’s engines use an aluminum block. Aluminum engine blocks are much more prone to warp and crack at high temperatures than cast iron.

A hardened steel chain, with no maintenance needs, drives the camshafts in the A4’s engine. A rubber cam drive belt that needs periodic replacement drives the TLX’s camshafts. If the TLX’s belt breaks, the engine could be severely damaged when the pistons hit the opened valves.

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.

Engine

As tested in Car and Driver the A4 45 TFSI is faster than the TLX Type S 3.0 turbo V6:

	A4	TLX
Zero to 60 MPH	4.8 sec	4.9 sec
Quarter Mile	13.5 sec	13.6 sec

Fuel Economy and Range

On the EPA test cycle the A4 gets better mileage than the TLX:

			MPG
A4
	AWD	40 TFSI 2.0 turbo 4-cyl. Hybrid	26 city/35 hwy
		45 TFSI 2.0 turbo 4-cyl. Hybrid	24 city/32 hwy
TLX
	FWD	2.0 turbo 4-cyl.	22 city/31 hwy
	AWD	2.0 turbo 4-cyl.	21 city/29 hwy
		3.0 turbo V6	19 city/25 hwy

Regenerative brakes improve the A4’s fuel efficiency by converting inertia back into energy instead of wasting it. The TLX doesn’t offer a regenerative braking system.

Transmission

The A4 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 TLX doesn’t offer an SMG or a conventional manual 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 TLX doesn’t offer launch control.

Brakes and Stopping

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 TLX are solid, not vented.

The A4 stops much shorter than the TLX:

	A4	TLX
70 to 0 MPH	149 feet	177 feet	Car and Driver
60 to 0 MPH	105 feet	127 feet	Motor Trend
60 to 0 MPH (Wet)	145 feet	148 feet	Consumer Reports

Tires and Wheels

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

Suspension and Handling

The A4 Premium Plus handles at .97 G’s, while the TLX A-Spec SH-AWD pulls only .87 G’s of cornering force in a Car and Driver skidpad test.

The A4 Premium Plus executes Motor Trend’s “Figure Eight” maneuver 1.6 seconds quicker than the TLX A-Spec SH-AWD (25.3 seconds @ .74 average G’s vs. 26.9 seconds @ .64 average G’s).

For better maneuverability, the A4’s turning circle is 2.1 feet tighter than the TLX’s (38.1 feet vs. 40.2 feet).

Chassis

The Audi A4 may be more efficient, handle and accelerate better because it weighs about 350 to 600 pounds less than the Acura TLX.

The A4 is 7.1 inches shorter than the TLX, making the A4 easier to handle, maneuver and park in tight spaces.

Passenger Space

The A4 has .1 inches more front headroom, 1.1 inches more rear headroom and .8 inches more rear legroom than the TLX.

Cargo Capacity

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 TLX 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 TLX has no towing capacity.

Servicing Ease

The engine in the A4 is mounted longitudinally (North-South), instead of sideways, as in the TLX. This makes it easier to service and maintain, because there are no rear spark plugs and the accessory belts are in front.

Ergonomics

The power windows standard on both the A4 and the TLX 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 TLX prevents the driver from operating the other windows just as it does the other passengers.

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 TLX’s standard 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 TLX doesn’t offer heated windshield washer nozzles.

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 TLX doesn’t offer headlight washers.

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

Manual rear side window sunshades are available in the A4 to help block heat and glare for the rear passengers. The TLX doesn’t offer rear side window sunshades.

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 TLX has an automatic rear view mirror, but its side mirrors don’t dim.

Both the A4 and the TLX 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 TLX.

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 TLX doesn’t offer an automated parking system.

Recommendations

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