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 Chrysler 300 has only front height-adjustable seat belts.

Both the Impala and 300 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 300'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 300 have standard driver and passenger frontal airbags, front side-impact airbags, driver knee airbags, side-impact head airbags, front seatbelt pretensioners, 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 35 MPH front crash tests on new vehicles. In this test, results indicate that the Chevrolet Impala is safer than the Chrysler 300:

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

A significantly tougher test than their original offset frontal crash test, the Insurance Institute for Highway Safety does 40 MPH small overlap frontal offset crash tests. In this test, where only 25% of the total width of the vehicle is struck, results indicate that the Chevrolet Impala is safer than the 300:

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 Chrysler 300:

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

For its top level performance in the IIHS moderate overlap frontal impact, side impact, rear impact, roof-crush crash tests, an “Acceptable” rating in the newer small overlap frontal crash test, and with its optional front crash prevention system, the Insurance Institute for Highway Safety grants the Impala its highest rating: “Top Pick Plus” for 2015, a rating granted to only 170 vehicles tested by the IIHS. The 300 is not even a standard “Top Pick” for 2015.

The Impala's corrosion warranty is 1 year longer than the 300's (6/100,000 vs. 5/100,000).

There are over 25 percent more Chevrolet dealers than there are Chrysler dealers, which makes it easier should you ever need service under the Impala's warranty.

For smoother operation, better efficiency and fewer moving parts, the Impala has an overhead cam design, rather than the old pushrod design of the 5.7 V8 in the 300.

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 300 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 45 points higher than the 300.

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 Chrysler vehicles. J.D. Power ranks Chevrolet 6th in initial quality, above the industry average. With 28 more problems per 100 vehicles, Chrysler is ranked 25th, 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 Chrysler vehicles. J.D. Power ranks Chevrolet fourth in reliability, above the industry average. With 31 more problems per 100 vehicles, Chrysler is ranked 16th.

From surveys of all its subscribers, Consumer Reports' December 2018 Auto Issue reports that Chevrolet vehicles are more reliable than Chrysler vehicles. Consumer Reports ranks Chevrolet 1 place higher in reliability than Chrysler.

The Impala's 3.6 DOHC V6 produces 13 more horsepower (305 vs. 292) and 4 lbs.-ft. more torque (264 vs. 260) than the 300's standard 3.6 DOHC V6. The Impala's 3.6 DOHC V6 produces 5 more horsepower (305 vs. 300) than the 300S' standard 3.6 DOHC V6.

As tested in Car and Driver the Chevrolet Impala is faster than the Chrysler 300 V6:

To lower fuel costs and make buying fuel easier, the Chevrolet Impala uses regular unleaded gasoline. The 300 with the 5.7 V8 engine requires mid-grade for maximum efficiency, which can cost 5 to 40 cents more per gallon.

The Impala stops shorter than the 300:

For better traction, the Impala has larger standard tires than the 300 (235/50R18 vs. 215/65R17).

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 300 Touring's standard 65 series tires. The Impala Premier's optional tires have a lower 40 series profile than the 300's optional 45 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 300 Touring.

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 300 doesn't offer drift compensation steering.

The Impala LT handles at .84 G's, while the 300 Limited 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 300 (26.6 seconds vs. 27.2 seconds).

The Chevrolet Impala may be more efficient, handle and accelerate better because it weighs about 300 to 600 pounds less than the Chrysler 300.

To almost totally eliminate engine vibration in the passenger area, the Impala has liquid-filled engine mounts. The liquid helps further dampen engine harshness. The 300 uses conventional solid rubber engine mounts.

As tested by Car and Driver, the interior of the Impala LT is quieter than the 300S:

The Impala has 1.3 inches more front headroom and 4 inches more front legroom than the 300.

The Impala has a much larger trunk than the 300 (18.8 vs. 16.3 cubic feet).

The Impala's power parking brake sets with one touch and releases with one touch or automatically. The 300's parking brake has to released manually.

The Impala's front and rear power windows all lower with one touch of the switches, making it more convenient at drive-up windows and toll booths, or when talking with someone outside of the car. The 300's rear power window switches have to be held the entire time to open them fully.

The Impala's power window, power lock, power mirror and cruise control switches are lit from behind, making them plainly visible and easier to operate at night. The 300's power mirror switches are unlit, making them difficult to find at night and operate safely.

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 300 doesn't offer a house-current electrical outlet.

Insurance will cost less for the Impala owner. The Complete Car Cost Guide estimates that insurance for the Impala will cost $340 less than the 300 over a five-year period.

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 300 only retains 34.71% to 38.68%.

According to The Car Book by Jack Gillis, the Impala is less expensive to operate than the 300 because typical repairs cost much less on the Impala than the 300, including $1159 less for a muffler, $674 less for front struts and $539 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 $3947 to $7466 less than for the Chrysler 300.

Consumer Reports® recommends the Chevrolet Impala, based on reliability, safety and performance. The Chrysler 300 isn't recommended.

Car and Driver performed a comparison test in its July 2013 issue and they ranked the Chevrolet Impala LT two places higher than the Chrysler 300S.

The Chevrolet Impala outsold the Chrysler 300 by 34% during the 2019 model year.