Compare the2022 BMW 8 SeriesVS 2021 Porsche 718 Boxster

The 8 Series’ pre-crash front seatbelts will tighten automatically in the event the vehicle detects an impending crash, improving protection against injury significantly. The 718 Boxster doesn’t offer pre-crash pretensioners.

The 8 Series has a standard PostCrash iBrake, which automatically applies the brakes in the event of a crash to help prevent secondary collisions and prevent further injuries. The 718 Boxster 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.

The 8 Series offers all-wheel drive to maximize traction under poor conditions, especially in ice and snow. The 718 Boxster doesn’t offer all-wheel drive.

The 8 Series’ lane departure warning system alerts a temporarily inattentive driver when the vehicle begins to leave its lane and gently nudges the vehicle back towards its lane. The 718 Boxster doesn’t offer a lane departure warning system.

To help make backing out of a parking space safer, the 8 Series’ optional cross-path warning system uses sensors in the rear bumper to alert the driver to vehicles approaching from the side, helping the driver avoid collisions. The 718 Boxster doesn’t offer a cross-path warning system.

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 718 Boxster doesn’t offer a driver alert monitor.

Both the 8 Series and the 718 Boxster have standard driver and passenger frontal airbags, front side-impact airbags, driver and front passenger knee airbags, side-impact head airbags, front seatbelt pretensioners, four-wheel antilock brakes, traction control, electronic stability systems to prevent skidding, daytime running lights, rearview cameras, available blind spot warning systems and rear parking sensors.

The BMW 8 Series weighs 699 to 1716 pounds more than the Porsche 718 Boxster. The NHTSA advises that heavier cars are much safer in collisions than their significantly lighter counterparts.

BMW pays for scheduled maintenance on the 8 Series for 2 years and 26000 miles longer than Porsche pays for maintenance for the 718 Boxster (3/36,000 vs. 1/10,000).

There are over 81 percent more BMW dealers than there are Porsche dealers, which makes it much easier should you ever need service under the 8 Series’ warranty.

J.D. Power and Associates rated the 8 Series first among large premium cars in their 2020 Initial Quality Study. The 718 Boxster isn’t in the top three in its category.

J.D. Power and Associates’ 2020 Initial Quality Study of new car owners surveyed provide the statistics that show that BMW vehicles are better in initial quality than Porsche vehicles. J.D. Power ranks BMW 18th in initial quality. With 10 more problems per 100 vehicles, Porsche is ranked 24th.

The 8 Series has more powerful engines than the 718 Boxster:

As tested in Car and Driver the M850i 4.4 turbo V8 is faster than the 718 Boxster S 2.5 turbo 4-cylinder (automatics tested):

On the EPA test cycle the 8 Series Coupe RWD gets better fuel mileage than the 718 Boxster:

On the EPA test cycle the 8 Series Convertible RWD gets better fuel mileage than the 718 Boxster:

Both the 8 Series and the 718 Boxster have a standard automatic start/stop engine feature to stop unnecessary fuel waste and pollution at stop lights and heavy traffic. All 8 Series have a standard disable switch for the system, so a driver can keep the engine from shutting off when the vehicle stops temporarily.

The 8 Series has 3.8 gallons more fuel capacity than the 718 Boxster’s standard fuel tank (18 vs. 14.2 gallons), for longer range between fill-ups. The 8 Series has 1.1 gallons more fuel capacity than the 718 Boxster’s optional fuel tank (18 vs. 16.9 gallons).

In its Green Vehicle Guide, the U.S. Environmental Protection Agency (EPA) rates the BMW 8 Series higher (3 out of 10) than the Porsche 718 Boxster (1). This means the 8 Series produces up to 22.5 pounds less smog-producing pollutants than the 718 Boxster every 15,000 miles.

The BMW 8 Series comes standard with an automatic transmission, for driver comfort, especially in the city. Automatic costs extra on the 718 Boxster.

An eight-speed automatic is standard on the BMW 8 Series, for better acceleration and lower engine speed on the highway. Only a seven-speed automatic is available for the 718 Boxster.

All wheel drive, available in the 8 Series, provides the best traction for acceleration in wet, dry, and icy conditions. In corners, all wheel drive allows both outside wheels to provide power, balancing the car. This allows for better handling. The Porsche 718 Boxster is not available with all wheel drive.

For better stopping power the 8 Series’ standard brake rotors are larger than those on the 718 Boxster:

For better traction, the 8 Series has larger tires than the 718 Boxster (F:245/35R20 & R:275/30R20 vs. F:235/45R18 & R:265/45R18).

The 8 Series’ standard 245/40R19 front and 275/35R19 rear tires provide better handling because they have a lower 40 series front and 35 series rear profile (height to width ratio) that provides a stiffer sidewall than the 718 Boxster’s standard 45 series tires.

For better ride, handling and brake cooling the 8 Series has standard 19-inch wheels. Smaller 18-inch wheels are standard on the 718 Boxster.

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 718 Boxster 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 718 Boxster 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. Porsche doesn’t offer an active suspension on the 718 Boxster.

For a smoother ride and more stable handling, the 8 Series’ wheelbase is 13.7 inches longer than on the 718 Boxster (111.1 inches vs. 97.4 inches).

For better handling and stability, the average track (width between the wheels) on the 8 Series is 3.9 inches wider in the front and 4.2 inches wider in the rear than the average track on the 718 Boxster.

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 718 Boxster doesn’t offer active grille shutters.

The 8 Series has standard seating for 4 passengers; the 718 Boxster can only carry 2.

The 8 Series has 32 cubic feet more passenger volume than the 718 Boxster (81 vs. 49).

The 8 Series Convertible has a much larger trunk with its top down than the 718 Boxster (12.4 vs. 9.6 cubic feet).

With its coupe body style, locking rear seatbacks and remote trunk release lockout, the 8 Series offers cargo security. The 718 Boxster’s non-lockable remote release defeats cargo security.

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 718 Boxster doesn’t offer a power trunk, so its trunk has to be closed manually.

The 8 Series has a standard remote vehicle starting system, so the vehicle can be started from inside the driver's house. This allows the driver to comfortably warm up the engine before going out to the vehicle. The climate system will also automatically heat or cool the interior. The 718 Boxster doesn’t offer a remote starting system.

Unlike the driver-only memory system optional at extra cost in the 718 Boxster, 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. An easy entry system costs extra on the 718 Boxster.

The 8 Series has a standard heads-up display that projects speed, tachometer, warning and navigation instruction readouts in front of the driver’s line of sight, allowing drivers to view information without diverting their eyes from the road. The 718 Boxster doesn’t offer a heads-up display.

If the windows are left open on the 8 Series the driver can close them all at the outside door handle or from a distance using the remote. On a hot day the driver can lower the windows from a distance using the keyless remote. The driver of the 718 Boxster can only operate the windows from inside the vehicle, with the ignition on.

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 718 Boxster’s cruise control switches are unlit, making them difficult to find at night and operate safely.

The 8 Series’ sun-visors swivel front-to-side to block glare from the side windows. The 718 Boxster’s visors are fixed into the windshield header.

The 8 Series has a standard heated steering wheel to take the chill out of steering on extremely cold winter days before the car heater warms up. A heated steering wheel costs extra on the 718 Boxster.

The BMW 8 Series comes in coupe, convertible and sedan bodystyles; the Porsche 718 isn’t available as a sedan.