For enhanced safety, the front shoulder belts of the Chevrolet Impala are height-adjustable, and the rear seat shoulder belts have child comfort guides to move the belt to properly fit children. A better fit can prevent injuries and the increased comfort also encourages children to buckle up. The Acura TLX has only front height-adjustable seat belts.

Both the Impala and TLX have child safety locks to prevent children from opening the rear doors. The Impala 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.

Both the Impala and the TLX have standard driver and passenger frontal airbags, front side-impact airbags, driver knee airbags, side-impact head airbags, front seatbelt pretensioners, front-wheel drive, height-adjustable front shoulder belts, plastic fuel tanks, four-wheel antilock brakes, traction control, electronic stability systems to prevent skidding, daytime running lights, rearview cameras, available crash mitigating brakes, lane departure warning systems, blind spot warning systems, rear parking sensors and rear cross-path warning.

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 Chevrolet Impala is safer than the Acura TLX:

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

The Impala's corrosion warranty is 1 year longer than the TLX's (6 vs. 5 years).

There are over 11 times as many Chevrolet dealers as there are Acura dealers, which makes it much easier should you ever need service under the Impala's warranty.

A hardened steel chain, with no maintenance needs, drives the camshafts in the Impala'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.

The Impala has a standard “limp home system” to keep drivers from being stranded if most or all of the engine's coolant is lost. The engine will run on only half of its cylinders at a time, reduce its power and light a warning lamp on the dashboard so the driver can get to a service station for repairs. The TLX doesn't offer a lost coolant limp home mode, so a coolant leak could strand you or seriously damage the car's engine.

A reliable vehicle saves its owner time, money and trouble. Nobody wants to be stranded or have to be without a vehicle while it's being repaired. Consumer Reports rates the Impala's reliability 28 points higher than the TLX.

J.D. Power and Associates' 2019 Initial Quality Study of new car owners surveyed provide the statistics that show that Chevrolet vehicles are better in initial quality than Acura vehicles. J.D. Power ranks Chevrolet 6th in initial quality, above the industry average. With 25 more problems per 100 vehicles, Acura is ranked 24th, below the industry average.

J.D. Power and Associates' 2019 survey of the owners of three-year-old vehicles provides the long-term dependability statistics that show that Chevrolet vehicles are more reliable than Acura vehicles. J.D. Power ranks Chevrolet fourth in reliability, above the industry average. With 56 more problems per 100 vehicles, Acura is ranked 26th.

The Impala's 3.6 DOHC V6 produces 99 more horsepower (305 vs. 206) and 82 lbs.-ft. more torque (264 vs. 182) than the TLX's standard 2.4 DOHC 4 cyl. The Impala's 3.6 DOHC V6 produces 15 more horsepower (305 vs. 290) than the TLX's optional 3.5 SOHC V6.

As tested in Motor Trend the Chevrolet Impala is faster than the Acura TLX 4 cyl.:

To lower fuel costs and make buying fuel easier, the Chevrolet Impala uses regular unleaded gasoline. The TLX requires premium for maximum efficiency, which can cost 20 to 55 cents more per gallon.

The Impala has 1.3 gallons more fuel capacity than the TLX (18.5 vs. 17.2 gallons), for longer range between fill-ups.

The Impala stops much shorter than the TLX:

For better traction, the Impala has larger standard tires than the TLX (235/50R18 vs. 225/55R17).

The Impala LT's standard tires provide better handling because they have a lower 50 series profile (height to width ratio) that provides a stiffer sidewall than the TLX's standard 55 series tires.

For better ride, handling and brake cooling the Impala LT has standard 18-inch wheels. Smaller 17-inch wheels are standard on the TLX. The Impala Premier's optional 20-inch wheels are larger than the 19-inch wheels on the TLX A-Spec.

The Impala's drift compensation steering can automatically compensate for road conditions which would cause the vehicle to drift from side to side, helping the driver to keep the vehicle straight more easily. The TLX doesn't offer drift compensation steering.

For a smoother ride and more stable handling, the Impala's wheelbase is 2.4 inches longer than on the TLX (111.7 inches vs. 109.3 inches).

The Impala LT handles at .84 G's, while the TLX V6 SH-AWD pulls only .82 G's of cornering force in a Car and Driver skidpad test.

The Impala LT executes Motor Trend's “Figure Eight” maneuver quicker than the TLX (26.6 seconds @ .67 average G's vs. 27 seconds @ .74 average G's).

As tested by Car and Driver while at idle, the interior of the Impala LT is quieter than the TLX (38 vs. 42 dB).

Because it has more passenger and cargo room, the EPA rates the Impala a Large car, while the TLX is rated a Compact.

The Impala has 11.7 cubic feet more passenger volume than the TLX (105 vs. 93.3).

The Impala has 2.7 inches more front headroom, 3.2 inches more front legroom, .4 inches more front shoulder room, .7 inches more rear headroom, 5.3 inches more rear legroom and 1.5 inches more rear shoulder room than the TLX.

The Impala has a much larger trunk than the TLX (18.8 vs. 14.3 cubic feet).

The Impala has a 1000 lbs. towing capacity. The TLX has no towing capacity.

The power windows standard on both the Impala and the TLX have locks to prevent small children from operating them. When the lock on the Impala 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 Impala offers an optional 115-volt a/c outlet on the center console, allowing you to recharge a laptop or run small household appliances without special adapters that can break or get misplaced. The TLX doesn't offer a house-current electrical outlet.

Insurance will cost less for the Impala owner. The Car Book by Jack Gillis rates the Impala with a number “3” insurance rate while the TLX is rated higher at a number “10” rate.

The Impala will cost the buyer less in the long run because of its superior resale value. The IntelliChoice estimates that the Impala will retain 42.7% to 43.7% of its original price after five years, while the TLX only retains 39.92% to 41.77%.

According to The Car Book by Jack Gillis, the Impala is less expensive to operate than the TLX because typical repairs cost much less on the Impala than the TLX, including $91 less for a muffler, $452 less for a starter, $211 less for fuel injection, $130 less for front struts and $762 less for a power steering pump.

IntelliChoice estimates that five-year ownership costs (depreciation, financing, insurance, fuel, fees, repairs and maintenance) for the Chevrolet Impala will be $2764 to $3808 less than for the Acura TLX.

Consumer Reports® recommends the Chevrolet Impala, based on reliability, safety and performance.

The Chevrolet Impala outsold the Acura TLX by 81% during the 2019 model year.