Compare the2025 BMW M3VS 2024 Audi S4

Over 200 people are killed each year when backed over by motor vehicles. The M3 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 S4 doesn’t offer automatic braking for stationary objects directly to the rear.

The M3 has a standard blind spot warning system that uses sensors to alert the driver to objects in the vehicle’s blind spots where the side view mirrors don’t reveal them and moves the vehicle back into its lane. A system to reveal vehicles in the S4’s blind spot costs extra.

To help make backing out of a parking space safer, the M3 has standard Cross Traffic Warning, helping the driver avoid collisions. Audi charges extra for Rear Cross-Traffic Assist on the S4.

The M3’s 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 S4 doesn’t offer a driver alert monitor.

Both the M3 and the S4 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 and available around view monitors.

BMW pays for scheduled maintenance on the M3 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 S4.

There are over 14 percent more BMW dealers than there are Audi dealers, which makes it easier should you ever need service under the M3’s 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 M3’s standard 3.0 turbo 6-cylinder produces 124 more horsepower (473 vs. 349) and 37 lbs.-ft. more torque (406 vs. 369) than the S4’s 3.0 turbo V6. The M3 Competition’s standard 3.0 turbo 6-cylinder produces 154 more horsepower (503 vs. 349) and 110 lbs.-ft. more torque (479 vs. 369) than the S4’s 3.0 turbo V6. The M3 Competition xDrive’s standard 3.0 turbo 6-cylinder produces 174 more horsepower (523 vs. 349) and 110 lbs.-ft. more torque (479 vs. 369) than the S4’s 3.0 turbo V6.

As tested in Car and Driver the M3 Competition is faster than the Audi S4 (automatics tested):

The M3 offers a manual transmission for better acceleration, control and sportiness. The S4 doesn’t offer a manual transmission.

For better stopping power the M3’s brake rotors are larger than those on the S4:

The M3 offers optional heat-treated ceramic brake rotors, which last ten to twenty times as long as conventional cast iron rotors, don’t rust, don’t fade during repeated high speed braking, and their lighter weight contribute to better braking, handling and acceleration. The S4 doesn’t offer ceramic brake rotors.

The M3 stops much shorter than the S4:

For better traction, the M3 has larger tires than the S4 (F:275/40R18 & R:285/35R19 vs. 255/35R19).

The M3’s optional 285/30R20 rear tires provide better handling because they have a lower 30 series profile (height to width ratio) that provides a stiffer sidewall than the S4’s 35 series tires.

For better ride, handling and brake cooling the M3 offers optional 20-inch rear wheels. The S4’s largest wheels are only 19-inches.

For a smoother ride and more stable handling, the M3’s wheelbase is 1.5 inches longer than on the S4 (112.5 inches vs. 111 inches).

For better handling and stability, the track (width between the wheels) on the M3 is 1.8 inches wider in the front and 2 inches wider in the rear than on the S4.

The M3’s front to rear weight distribution is more even (52.9% to 47.1%) than the S4’s (57% to 43%). This gives the M3 more stable handling and braking.

The M3 Competition handles at 1.03 G’s, while the S4 Prestige pulls only .91 G’s of cornering force in a Motor Trend skidpad test.

The M3 Competition executes Motor Trend’s “Figure Eight” maneuver 1.4 seconds quicker than the S4 Prestige (23.8 seconds @ .85 average G’s vs. 25.2 seconds @ .75 average G’s).

Because it has more passenger and cargo room, the EPA rates the M3 a Mid-size car, while the S4 is rated a Compact.

The M3 has 3 cubic feet more passenger volume than the S4 (95 vs. 92).

The M3 has 3.3 inches more front headroom, .3 inches more front legroom, .1 inches more front shoulder room, .4 inches more rear headroom and .1 inches more rear shoulder room than the S4.

The M3 has a much larger trunk than the S4 (16.9 vs. 12 cubic feet).

Pulling a handle automatically lowers the M3’s rear seats, to make changing between passengers and cargo easier. The S4 doesn’t offer automatic folding seats.

To make loading and unloading groceries and cargo easier, especially for short adults, the M3 offers an optional 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 S4 doesn’t offer a power trunk, so its trunk has to be closed manually.

The M3’s standard Comfort Access allow you to unlock the doors from any 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 S4 only offers hands-free access for the ignition, none to unlock the car.

Laser headlights, optional on the M3, produce their light by firing blue lasers through phosphorus, a process that uses one-half the power of the S4’s LED headlights. Laser headlights can have double the range of LEDs with a much smaller surface area.

The BMW M3 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 S4 Premium Plus/Prestige.

To quickly and conveniently keep personal devices charged without cables tangling and wearing out, the BMW M3 has a standard wireless phone charging system (Qi) in the center console. Only the S4 Premium Plus/Prestige offers wireless charging.

The M3’s optional Parking Assistant Plus can parallel park or back into a parking spot by itself, starting, stopping and changing direction automatically. The S4 Prestige’s automatic parking system requires operating the brakes and transmission to safely park.

The M3 is available in both rear-wheel drive and all-wheel drive configurations. The S4 doesn’t offer a two-wheel drive configuration.

The BMW 3 Series outsold the Audi A4/S4 by almost three to one during 2023.