Compare the2025 Audi A6VS 2025 BMW 4 Series Gran Coupe

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 its 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.

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.

Both the A6 and 4 Series Gran Coupe offer rear cross-traffic warning, but the A6 with Rear Cross-Traffic Assist also has Automatic Brake Activation (automatically applies the brakes) to better prevent a collision when backing near traffic. The 4 Series Gran Coupe’s Cross Traffic Warning doesn’t automatically brake.

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, crash mitigating brakes, post-collision automatic braking systems, daytime running lights, lane departure warning systems, rearview cameras, available blind spot warning systems and around view monitors.

The A6 45 TFSI’s standard 2.0 turbo 4-cylinder hybrid produces 6 more horsepower (261 vs. 255) than the 430i Gran Coupe’s standard 2.0 turbo 4-cylinder hybrid.

The A6 has 3.7 gallons more fuel capacity than the 4 Series Gran Coupe (19.3 vs. 15.6 gallons), for longer range between fill-ups.

The A6 offers an available 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.

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

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 55 TFSI’s optional 21-inch wheels are larger than the 20-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 tire options on the 4 Series Gran Coupe don’t have a run-flat feature, either.

For a smoother ride and more stable handling, the A6’s wheelbase is 2.7 inches longer than on the 4 Series Gran Coupe (115.1 inches vs. 112.4 inches).

For better handling and stability, the track (width between the wheels) on the A6 is 1.8 inches wider in the front and .3 inches wider in the rear than on the 4 Series Gran Coupe.

The design of the Audi A6 amounts to more than styling. The A6 has an aerodynamic coefficient of drag of .28 Cd. That is lower than the 4 Series Gran Coupe (.28 to .3) and many sports cars. A more efficient exterior helps keep the interior quieter and helps the A6 get better fuel mileage.

Because it has more passenger and cargo room, the EPA rates the A6 a Mid-size car, while the 4 Series Gran Coupe is rated a Compact.

The A6 has 8 cubic feet more passenger volume than the 4 Series Gran Coupe (99 vs. 91).

The A6 has 2.6 inches more front shoulder room, 1.5 inches more rear headroom, 2.5 inches more rear legroom and 2.2 inches more rear shoulder room than the 4 Series Gran Coupe.

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, non-lockable folding seat and non-lockable remote release defeat cargo security.

Unlike the driver-only memory system in the 4 Series Gran Coupe, the A6 Prestige has a 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.

The A6’s instruments include an oil pressure gauge and a temperature gauge - which could save your engine! Often ‘idiot lights’ don’t warn you until damage has been done. The 4 Series Gran Coupe does not have an oil pressure gauge.

Heated windshield washer nozzles are standard on the A6 to prevent washer fluid and nozzles from freezing and help continue to keep the windshield clear in sub-freezing temperatures. The 4 Series Gran Coupe 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 A6 Premium Plus/Prestige has standard headlight washers to keep headlight output high. The 4 Series Gran Coupe doesn’t offer headlight washers.

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.

A power rear sunshade and manual rear side window sunshades are standard in the A6 Prestige to help block heat and glare for the rear passengers. The 4 Series Gran Coupe doesn’t offer a rear or rear side window sunshades.

The A6 Prestige has standard massaging front seats in order to maximize comfort and eliminate fatigue on long trips. Massaging seats aren’t available in the 4 Series Gran Coupe.

The A6 Prestige’s Park Assist Plus can parallel park or back into a parking spot by itself, starting, stopping and changing direction automatically. Remote Park Assist Plus will park and retrieve your car remotely: press a button and watch it park itself. This is ideal for tight locations. The 4 Series Gran Coupe’s automatic parking system does not offer parking by remote control.

Consumer Reports® recommends the Audi A6, based on reliability, safety and performance.