2019 Mazda 6 vs. 2019 Audi A4

Detailed Review, Specifications & Comparison

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Both the Mazda 6 and the A4 have standard driver and passenger frontal airbags, front side-impact airbags, side-impact head airbags, front seatbelt pretensioners, front wheel drive, height adjustable front shoulder belts, four-wheel antilock brakes, traction control, electronic stability systems to prevent skidding, crash mitigating brakes, daytime running lights, rearview cameras and available 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 Mazda 6 is safer than the Audi A4:


Mazda 6



5 Stars

4 Stars




5 Stars

4 Stars




Neck Injury Risk



Neck Compression

24 lbs.

55 lbs.

Leg Forces (l/r)

43/70 lbs.

431/395 lbs.




4 Stars

4 Stars

Chest Compression

.4 inches

1 inches

Leg Forces (l/r)

335/150 lbs.

324/341 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 Mazda 6 is safer than the Audi A4:


Mazda 6



Front Seat


5 Stars

5 Stars




Chest Movement

1.1 inches

1.1 inches


Rear Seat


5 Stars

5 Stars

Hip Force

380 lbs.

777 lbs.


Into Pole


5 Stars

5 Stars




Spine Acceleration

36 G’s

47 G’s

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

For its top level performance in IIHS driver-side small overlap frontal, moderate overlap frontal, side impact, rear impact and roof-crush tests, with its optional front crash prevention system, its “Good” rating in the new passenger-side small overlap crash test, and its available headlight’s “Acceptable” rating, the Insurance Institute for Highway Safety grants the Mazda 6 the rating of “Top Pick” for 2019, a rating granted to only 62 vehicles tested by the IIHS. The A4 has not been fully tested, yet.


Mazda’s powertrain warranty covers the 6 1 year and 10,000 miles longer than Audi covers the A4. Any repair needed on the engine, transmission, axles, joints or driveshafts is fully covered for 5 years or 60,000 miles. Coverage on the A4 ends after only 4 years or 50,000 miles.

There are almost 2 times as many Mazda dealers as there are Audi dealers, which makes it much easier should you ever need service under the 6’s warranty.


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 Mazda 6’s reliability 15 points higher than the A4.

J.D. Power and Associates’ 2018 Initial Quality Study of new car owners surveyed provide the statistics that show that Mazda vehicles are better in initial quality than Audi vehicles. J.D. Power ranks Mazda 22nd in initial quality. With 5 more problems per 100 vehicles, Audi is ranked 25th.

From surveys of all its subscribers, Consumer Reports’ December 2018 Auto Issue reports that Mazda vehicles are more reliable than Audi vehicles. Consumer Reports ranks Mazda third in reliability. Audi is ranked 7th.


The Mazda 6 Grand Touring/Signature’s standard 2.5 turbo 4 cyl. produces 2 more horsepower (250 vs. 248) and 37 lbs.-ft. more torque (310 vs. 273) than the A4 45 TFSI’s standard 2.0 turbo 4 cyl.

Fuel Economy and Range

An engine control system that can shut down half of the engine’s cylinders helps improve the Mazda 6 (except Turbo)’s fuel efficiency. The A4 doesn’t offer a system that can shut down part of the engine.

The Mazda 6 has 1.1 gallons more fuel capacity than the A4 (16.4 vs. 15.3 gallons), for longer range between fill-ups.

Brakes and Stopping

For better stopping power the Mazda 6 Touring/Signature’s front brake rotors are larger than those on the A4 FWD:


Mazda6 Turbo


Front Rotors

12.6 inches

12.4 inches

The Mazda 6 stops shorter than the A4:


Mazda 6



60 to 0 MPH

132 feet

135 feet

Consumer Reports

60 to 0 MPH (Wet)

137 feet

145 feet

Consumer Reports

Suspension and Handling

For a smoother ride and more stable handling, the Mazda 6’s wheelbase is 1.4 inches longer than on the A4 (111.4 inches vs. 110 inches).

For better maneuverability, the Mazda 6’s turning circle is 1.4 feet tighter than the A4’s (36.7 feet vs. 38.1 feet).


The Mazda 6 may be more efficient, handle and accelerate better because it weighs about 50 to 200 pounds less than the Audi A4.

The Mazda 6 (except Sport) offers available computer-generated active noise cancellation to help remove annoying noise and vibration from the passenger compartment, especially at low frequencies. The A4 doesn’t offer active noise cancellation.

Passenger Space

Because it has more passenger and cargo room, the EPA rates the Mazda 6 a Mid-size car, while the A4 is rated a Compact.

The Mazda 6 has 7.7 cubic feet more passenger volume than the A4 (99.7 vs. 92).

The Mazda 6 has .9 inches more front legroom, 3 inches more rear legroom and .6 inches more rear shoulder room than the A4.

Cargo Capacity

The Mazda 6 has a much larger trunk than the A4 (14.7 vs. 13 cubic feet).


The Mazda 6 offers a remote vehicle starting system, so the vehicle can be started from inside the driver's house. This allows the driver to comfortably warm up the engine before going out to the vehicle. The A4 doesn’t offer a remote starting system.

Consumer Reports rated the Mazda 6’s headlight performance “Good,” a higher rating than the A4’s headlights, which were rated “Poor.”

The A4’s cornering lamps activate a lamp on the front corner when the turn signal is activated. The Mazda 6 Grand Touring Reserve/Signature’s standard adaptive cornering lights turn the actual headlight unit up to several degrees, depending on steering wheel angle and vehicle speed. This lights a significant distance into corners at any speed.

Economic Advantages

Insurance will cost less for the Mazda 6 owner. The Car Book by Jack Gillis rates the Mazda 6 with a number “1” insurance rate while the A4 is rated higher at a number “5” rate.

According to The Car Book by Jack Gillis, the Mazda 6 is less expensive to operate than the A4 because it costs $173 less to do the manufacturer’s suggested maintenance for 50,000 miles. Typical repairs cost much less on the Mazda 6 than the A4, including $482 less for a water pump, $308 less for a muffler, $38 less for front brake pads, $570 less for a starter, $59 less for a fuel pump, $582 less for front struts and $173 less for a timing belt/chain.


The Mazda 6 was chosen as one of Car and Driver’s “Top Ten” for 2 of the last 6 years. The A4 has never been a Car and Driver “Top Ten” pick.

© 1991-2018 Advanta-STAR Automotive Research. All rights reserved.

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