2019 Audi A6 vs. 2019 BMW 4 Series Gran Coupe

Detailed Review, Specifications & Comparison

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Safety

For enhanced safety, the front and rear seat shoulder belts of the Audi A6 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 BMW 4 Series Gran Coupe doesn’t offer pretensioners for the rear seat belts.

The A6’s pre-crash front seatbelts will tighten automatically in the event the vehicle detects an impending crash, improving protection against injury significantly. The 4 Series Gran Coupe doesn’t offer pre-crash pretensioners.

For enhanced safety, the front seat shoulder belts of the Audi A6 are height-adjustable to accommodate a wide variety of driver and passenger heights. A better fit can prevent injuries and the increased comfort also encourages passengers to buckle up. The BMW 4 Series Gran Coupe doesn’t offer height-adjustable seat belts.

Both the A6 and 4 Series Gran Coupe have child safety locks to prevent children from opening the rear doors. The A6 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 4 Series Gran Coupe’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 A6 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 4 Series Gran Coupe 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 A6. But it costs extra on the 4 Series Gran Coupe.

A passive infrared night vision system optional on the A6 Prestige helps the driver to more easily detect people, animals or other objects in front of the vehicle at night. Using an infrared camera to detect heat, the system then displays the image on a monitor in the dashboard. The 4 Series Gran Coupe doesn’t offer a night vision system.

To help make backing safer, the A6’s optional cross-path warning system uses wide-angle radar in the rear bumper to alert the driver to vehicles approaching from the side, helping the driver avoid collisions. The 4 Series Gran Coupe doesn’t offer a cross-path warning system.

Both the A6 and the 4 Series Gran Coupe have standard driver and passenger frontal airbags, front side-impact airbags, driver and front passenger knee airbags, side-impact head airbags, four-wheel antilock brakes, traction control, electronic stability systems to prevent skidding, daytime running lights, rearview cameras, available lane departure warning systems, blind spot warning systems and around view monitors.

Reliability

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

Engine

The A6’s 3.0 turbo V6 hybrid produces 87 more horsepower (335 vs. 248) and 111 lbs.-ft. more torque (369 vs. 258) than the 430i Gran Coupe’s standard 2.0 turbo 4 cyl. The A6’s 3.0 turbo V6 hybrid produces 13 more horsepower (335 vs. 322) and 37 lbs.-ft. more torque (369 vs. 332) than the 440i Gran Coupe’s standard 3.0 turbo 6 cyl.

Fuel Economy and Range

To lower fuel costs and make buying fuel easier, the Audi A6 uses regular unleaded gasoline (premium recommended for maximum performance). The 4 Series Gran Coupe requires premium, which can cost 20 to 55 cents more per gallon.

The A6 has 3.5 gallons more fuel capacity than the 4 Series Gran Coupe (19.3 vs. 15.8 gallons), for longer range between fill-ups.

Transmission

The A6 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 4 Series Gran Coupe doesn’t offer an SMG or a conventional manual transmission.

Brakes and Stopping

For better stopping power the A6’s standard brake rotors are larger than those on the 4 Series Gran Coupe:

 

A6

4 Series

Front Rotors

13.3 inches

12.3 inches

Rear Rotors

13 inches

11.8 inches

Tires and Wheels

For better traction, the A6 has larger standard tires than the 4 Series Gran Coupe (245/45R19 vs. 225/45R18). The A6’s optional tires are larger than the largest tires available on the 4 Series Gran Coupe (255/40R20 vs. 225/45R18).

The A6 Prestige’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 4 Series Gran Coupe’s optional 40 series front tires.

For better ride, handling and brake cooling the A6 has standard 19-inch wheels. Smaller 18-inch wheels are standard on the 4 Series Gran Coupe. The A6 Prestige’s optional 21-inch wheels are larger than the 19-inch wheels optional on the 4 Series Gran Coupe.

The A6 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 4 Series Gran Coupe; it requires you to depend on its run-flat tires, which limits mileage and speed before they are repaired. If a run-flat is damaged beyond repair by a road hazard your vehicle will have to be towed. Some models of the 4 Series Gran Coupe don’t even offer run-flats.

Suspension and Handling

For a smoother ride and more stable handling, the A6’s wheelbase is 4.5 inches longer than on the 4 Series Gran Coupe (115.1 inches vs. 110.6 inches).

For better handling and stability, the track (width between the wheels) on the A6 is 3.3 inches wider in the front and .9 inches wider in the rear than the average track on the 4 Series Gran Coupe.

For better maneuverability, the A6’s turning circle is .7 feet tighter than the 4 Series Gran Coupe’s (36.4 feet vs. 37.1 feet). The A6’s turning circle is 2.3 feet tighter than the 4 Series Gran Coupe xDrive’s (36.4 feet vs. 38.7 feet).

Passenger Space

The A6 has 3 inches more front shoulder room, 1.2 inches more rear headroom, 3.7 inches more rear legroom and 2.2 inches more rear shoulder room than the 4 Series Gran Coupe.

Cargo Capacity

With its sedan body style, valet key, locking rear seatbacks and remote trunk release lockout, the A6 offers cargo security. The 4 Series Gran Coupe’s hatchback body style defeats cargo security.

Servicing Ease

J.D. Power and Associates surveys of service recipients show that Audi service is better than BMW. J.D. Power ranks Audi third in service department satisfaction. With a 14% lower rating, BMW is ranked 8th.

Ergonomics

Unlike the driver-only memory system in the 4 Series Gran Coupe, the A6 offers an optional passenger memory, so that when drivers switch, the memory setting adjusts the driver’s seat, steering wheel position and outside mirror angle and the front passenger seat also adjusts to the new passenger’s preset preferences.

The A6’s standard easy entry system raises the steering wheel and glides the driver’s seat back, making it easier for the driver to get in and out. The 4 Series Gran Coupe doesn’t offer an easy entry system.

To shield the driver and front passenger’s vision over a larger portion of the windshield and side windows, the A6 has standard extendable sun visors. The 4 Series Gran Coupe doesn’t offer extendable visors.

Optional air-conditioned seats in the A6 keep the driver and front passenger comfortable and take the sting out of hot seats in summer. The 4 Series Gran Coupe doesn’t offer air-conditioned seats.

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

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