Compare the2025 BMW 3 Series SedanVS 2024 Audi A4

In the past twenty years hundreds of infants and young children have died after being left in vehicles, usually by accident. When turning the vehicle off, drivers of the 3 Series Sedan are reminded to check the back seat if they opened the rear door before starting out. The A4 doesn’t offer a back seat reminder.

Over 200 people are killed each year when backed over by motor vehicles. The 3 Series Sedan 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 A4 doesn’t offer automatic braking for stationary objects directly to the rear.

The 3 Series Sedan’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 A4 doesn’t offer a driver alert monitor.

Both the 3 Series Sedan and the A4 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, rearview cameras, available all wheel drive, lane departure warning systems, blind spot warning systems, around view monitors and rear cross-path warning.

The National Highway Traffic Safety Administration does 35 MPH front crash tests on new vehicles. In this test, results indicate that the BMW 3 Series Sedan is safer than the Audi A4:

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 BMW 3 Series Sedan is safer than the Audi A4:

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

BMW pays for scheduled maintenance on the 3 Series Sedan for 3 years and 36,000 miles. BMW will pay for oil changes, tire rotations, 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 A4.

There are over 14 percent more BMW dealers than there are Audi dealers, which makes it easier should you ever need service under the 3 Series Sedan’s warranty.

To reliably start during all conditions and help handle large electrical loads, the 3 Series Sedan has a standard 720-amp battery. The A4’s 420-amp battery isn’t as powerful.

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 3 Series Sedan’s reliability 17 points higher than the A4.

J.D. Power and Associates rated the 3 Series Sedan third among compact premium cars in their 2024 Initial Quality Study. The A4 isn’t in the top three.

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 330i’s standard 2.0 turbo 4-cylinder hybrid produces 54 more horsepower (255 vs. 201) and 59 lbs.-ft. more torque (295 vs. 236) than the A4 40 TFSI’s standard 2.0 turbo 4-cylinder hybrid. The 330i’s 2.0 turbo 4-cylinder hybrid produces 22 lbs.-ft. more torque (295 vs. 273) than the A4 45 TFSI’s standard 2.0 turbo 4-cylinder hybrid. The M340i’s standard 3.0 turbo 6-cylinder hybrid produces 125 more horsepower (386 vs. 261) and 125 lbs.-ft. more torque (398 vs. 273) than the A4 45 TFSI’s standard 2.0 turbo 4-cylinder hybrid.

As tested in Car and Driver the M340i 3.0 turbo 6-cylinder hybrid is faster than the A4 45 TFSI:

On the EPA test cycle the 3 Series Sedan gets better mileage than the A4:

In its Green Vehicle Guide, the U.S. Environmental Protection Agency (EPA) rates the BMW 3 Series Sedan higher (6 to 7 out of 10) than the Audi A4 (5). This means the 3 Series Sedan produces up to 8 pounds less smog-producing pollutants than the A4 every 15,000 miles.

An eight-speed automatic is standard on the BMW 3 Series Sedan, for better acceleration and lower engine speed on the highway. Only a seven-speed automatic is available for the A4.

For better stopping power the 3 Series Sedan’s brake rotors are larger than those on the A4:

The 3 Series Sedan stops much shorter than the A4:

The 330i’s standard tires provide better handling because they have a lower 45 series profile (height to width ratio) that provides a stiffer sidewall than the A4’s standard 50 series tires.

For better ride, handling and brake cooling the 330i has standard 18-inch wheels. Smaller 17-inch wheels are standard on the A4.

Changing a flat tire near traffic can be dangerous and inconvenient. The run-flat tires available on the 3 Series Sedan can be driven up to 50 miles without any air pressure, allowing you to drive to a service station for a repair. The A4 doesn’t offer run-flat tires.

The 3 Series Sedan offers an optional driver-adjustable suspension system. It allows the driver to choose between an extra-supple ride, reducing fatigue on long trips, or a sport setting, which allows maximum control for tricky roads. The A4’s suspension doesn’t offer adjustable shock absorbers.

For a smoother ride and more stable handling, the 3 Series Sedan’s wheelbase is 1.2 inches longer than on the A4 (112.2 inches vs. 111 inches).

The 3 Series Sedan’s front to rear weight distribution is more even (52.1% to 47.9%) than the A4’s (56% to 44%). This gives the 3 Series Sedan more stable handling and braking.

The 330i handles at .95 G’s, while the A4 Premium pulls only .85 G’s of cornering force in a Motor Trend skidpad test.

The M340i executes Motor Trend’s “Figure Eight” maneuver 2.2 seconds quicker than the A4 Premium (25 seconds @ .77 average G’s vs. 27.2 seconds @ .64 average G’s).

The design of the BMW 3 Series Sedan amounts to more than styling. The 3 Series Sedan has an aerodynamic coefficient of drag of .26 Cd. That is significantly lower than the A4 (.3) and many sports cars. A more efficient exterior helps keep the interior quieter and helps the 3 Series Sedan get better fuel mileage.

The front grille of the 3 Series Sedan uses electronically controlled shutters to close off airflow and reduce drag when less engine cooling is needed. This helps improve highway fuel economy. The A4 doesn’t offer active grille shutters.

The 3 Series Sedan has 1.4 inches more front headroom, .7 inches more front legroom, .1 inches more front shoulder room, .2 inches more rear headroom and .1 inches more rear shoulder room than the A4.

The 3 Series Sedan has a much larger trunk than the A4 (16.9 vs. 12 cubic feet).

Pulling a handle automatically lowers the 3 Series Sedan’s rear seats, to make changing between passengers and cargo easier. The A4 doesn’t offer automatic folding seats.

To make loading and unloading groceries and cargo easier, especially for short adults, the 3 Series Sedan offers an optional power trunk, which opens and closes automatically by pressing a button, or optionally by just kicking your foot under the back bumper, completely leaving your hands free. The A4 doesn’t offer a power trunk, so its trunk has to be closed manually.

Consumer Reports rated the 3 Series Sedan’s headlight performance “Fair,” 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 3 Series Sedan’s optional 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.

The BMW 3 Series Sedan 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 costs extra on the A4.

To quickly and conveniently keep personal devices charged without cables tangling and wearing out, the BMW 3 Series has a standard wireless phone charging system (Qi) in the center console. Only the A4 Premium Plus/Prestige offers wireless charging.

The 3 Series Sedan’s optional Parking Assistant Plus can parallel park or back into a parking spot by itself, starting, stopping and changing direction automatically. The A4 Prestige’s automatic parking system requires operating the brakes and transmission to safely park.

The 3 Series Sedan is available in both rear-wheel drive and all-wheel drive configurations. The A4 doesn’t offer a two-wheel drive configuration.

Insurance will cost less for the 3 Series Sedan owner. The Car Book by Jack Gillis rates the 3 Series Sedan with a number “3” insurance rate while the A4 is rated higher at a number “5” rate.

According to The Car Book by Jack Gillis, the 3 Series Sedan is less expensive to operate than the A4 because it costs $28 less to do the manufacturer’s suggested maintenance for 50,000 miles. Typical repairs cost much less on the 3 Series Sedan than the A4, including $211 less for a starter, $326 less for a fuel pump and $233 less for front struts.

Consumer Reports® recommends both the BMW 3 Series Sedan and the Audi A4, based on reliability, safety and performance.

J.D. Power and Associates rated the 3 Series Sedan third among compact premium cars in owner reported satisfaction. This includes how well the vehicle performs and satisfies its owner’s expectations. The A4 isn’t in the top three.

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