Compare the2025 BMW 8 SeriesVS 2024 Audi S5

Over 200 people are killed each year when backed over by motor vehicles. The 8 Series offers an optional Active Park Distance Control that uses rear sensors to monitor for objects to the rear and automatically applies the brakes to prevent a collision. The S5 doesn’t offer automatic braking for stationary objects directly to the rear.

The 8 Series’ driver alert monitor detects an inattentive driver then sounds a warning and suggests a break. According to the NHTSA, drivers who fall asleep cause about 100,000 crashes and 1500 deaths a year. The S5 doesn’t offer a driver alert monitor.

Both the 8 Series and the S5 have standard driver and passenger frontal airbags, front side-impact airbags, driver and front passenger knee airbags, side-impact head airbags, front seatbelt pretensioners, plastic fuel tanks, 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, around view monitors and rear cross-path warning.

BMW pays for scheduled maintenance on the 8 Series for 3 years and 36,000 miles. BMW will pay for oil changes, air filter replacements, cabin filter replacement, brake fluid replacement, inspections, and any other required maintenance. Audi only pays for the first scheduled maintenance visit on the S5.

There are over 14 percent more BMW dealers than there are Audi dealers, which makes it easier should you ever need service under the 8 Series’ warranty.

J.D. Power and Associates’ 2024 Initial Quality Study of new car owners surveyed provide the statistics that show that BMW vehicles are better in initial quality than Audi vehicles. With 36 fewer problems per 100 vehicles, JD Power ranks BMW higher than Audi.

J.D. Power and Associates’ 2024 survey of the owners of three-year-old vehicles provides the long-term dependability statistics that show that BMW vehicles are more reliable than Audi With 85 fewer problems per 100 vehicles in the first three years of ownership, J.D. Power ranks BMW higher than Audi.

From surveys of all its subscribers, Consumer Reports’ January 2024 Auto Issue reports that BMW vehicles are more reliable than Audi vehicles. Consumer Reports ranks BMW 10 places higher in reliability than Audi.

The M850i’s standard 4.4 turbo V8 produces 174 more horsepower (523 vs. 349) and 184 lbs.-ft. more torque (553 vs. 369) than the S5’s 3.0 turbo V6.

As tested in Car and Driver the M850i 4.4 turbo V8 is faster than the Audi S5:

On the EPA test cycle the 8 Series Convertible gets better mileage than the S5 Cabriolet:

The 8 Series has 2.7 gallons more fuel capacity than the S5 (18 vs. 15.3 gallons), for longer range between fill-ups.

The 8 Series’ launch control uses engine electronics to hold engine RPM’s precisely in order to provide the most stable and rapid acceleration possible, using all of the available traction. The S5 doesn’t offer launch control.

For better stopping power the 8 Series’ brake rotors are larger than those on the S5:

For better traction and acceleration, the 8 Series has larger rear tires than the S5 (275/30R20 vs. 255/35R19). The 8 Series’ optional rear tires are larger than the largest rear tires available on the S5 (275/30R20 vs. 265/30R20).

Changing a flat tire near traffic can be dangerous and inconvenient. The run-flat tires available on the 8 Series can be driven up to 50 miles without any air pressure, allowing you to drive to a service station for a repair. The S5 doesn’t offer run-flat tires.

The 8 Series M850i has active sway bars, which help keep it flat and controlled during cornering, but disconnect at lower speeds to smooth the ride and offer greater off-road suspension articulation. This helps keep the tires glued to the road on-road and off. The S5 doesn’t offer an active sway bar system.

The M850i offers an available active suspension system, which counteracts cornering forces actively, limiting body roll and improving handling and stability. Audi doesn’t offer an active suspension on the S5.

For a smoother ride and more stable handling, the 8 Series’ wheelbase is 2.3 inches longer than on the S5 (111.1 inches vs. 108.8 inches).

For better handling and stability, the average track (width between the wheels) on the 8 Series is 1.5 inches wider in the front and 2.9 inches wider in the rear than the track on the S5.

The 8 Series’ front to rear weight distribution is more even (50.3% to 49.7%) than the S5’s (56.7% to 43.3%). This gives the 8 Series more stable handling and braking.

The M850i xDrive Coupe handles at .98 G’s, while the S5 Prestige Coupe pulls only .94 G’s of cornering force in a Car and Driver skidpad test.

The front grille of the 8 Series uses electronically controlled shutters to close off airflow and reduce drag when less engine cooling is needed. This helps improve highway fuel economy. The S5 doesn’t offer active grille shutters.

The 8 Series Coupe has 1.5 inches more front headroom, .8 inches more front legroom and 1.9 inches more front shoulder room than the S5 Coupe.

The 8 Series Convertible has .6 inches more front headroom, .8 inches more front legroom and 1.9 inches more front shoulder room than the S5 Cabriolet.

The 8 Series Coupe has a much larger trunk than the S5 Coupe (14.8 vs. 10.9 cubic feet).

The 8 Series Convertible has a much larger trunk with its top down than the S5 Cabriolet with its top down (12.4 vs. 7.3 cubic feet). The 8 Series Convertible has a much larger trunk than the S5 Cabriolet with its top up (12.4 vs. 9.3 cubic feet).

To make loading and unloading groceries and cargo easier, especially for short adults, the 8 Series has a standard power trunk, which opens and closes automatically by pressing a button or just by kicking your foot under the back bumper, completely leaving your hands free. The S5 doesn’t offer a power trunk, so its trunk has to be closed manually.

Unlike the driver-only memory system optional at extra cost in the S5, the 8 Series has standard driver and passenger memory, so that when drivers switch, the memory setting adjusts the driver’s seat, steering wheel position, outside mirror angle, climate settings and radio stations and the front passenger seat also adjusts to the new passenger’s preset preferences.

The 8 Series’ standard easy entry system raises the steering wheel, making it easier for the driver to get in and out. The S5 doesn’t offer an easy entry system.

The 8 Series’ standard Comfort Access allow you to unlock the doors from either outside door handle, open the trunk, and start the engine, all without removing the key from the pocket or purse. Keyless Engine Start/Stop standard on the S5 only offers hands-free access for the ignition, none to unlock the car.

The 8 Series’ 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 S5’s cruise control switches are unlit, making them difficult to find at night and operate safely.

The BMW 8 Series has power folding mirrors that offer unparalleled convenience while maneuvering in tight places or parked. With the mirrors folded it’s easier to walk past and help prevent parking damage. The mirrors can be quickly unfolded when the driver is ready to leave. Power folding mirrors are only offered on the S5 Premium Plus/Prestige.

To quickly and conveniently keep personal devices charged without cables tangling and wearing out, the BMW 8 Series has a standard wireless phone charging system (Qi) in the center console. Only the S5 Premium Plus/Prestige offers wireless charging.

The 8 Series’ optional Parking Assistant Plus can parallel park or back into a parking spot by itself, starting, stopping and changing direction automatically. The S5 Prestige’s automatic parking system requires operating the brakes and transmission to safely park.

The 8 Series is available in both rear-wheel drive and all-wheel drive configurations. The S5 doesn’t offer a two-wheel drive configuration.