Certified Benz & Beemer Compares 2020 BMW M8 VS 2019 Porsche 911 Near Phoenix, AZ

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2020 BMW M8

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VS

2019 Porsche 911

Safety Comparison

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The M8’s pre-crash front seatbelts will tighten automatically in the event the vehicle detects an impending crash, improving protection against injury significantly. The 911 doesn’t offer pre-crash pretensioners.

To provide maximum traction and stability on all roads, All-Wheel Drive is standard on the M8. But it costs extra on the 911.

A passive infrared night vision system optional on the M8 helps the driver to more easily detect people, animals or other objects in front of the vehicle at night. Using an infrared camera to detect heat, the system then displays the image on a monitor in the dashboard. The 911 doesn’t offer a night vision system.

The M8’s optional lane departure warning system alerts a temporarily inattentive driver when the vehicle begins to leave its lane. The 911 doesn’t offer a lane departure warning system.

The M8 offers an optional Surround View to allow the driver to see objects all around the vehicle on a screen. The 911 only offers a rear monitor and front and rear parking sensors that beep or flash a light. That doesn’t help with obstacles to the sides.

To help make backing safer, the M8’s optional cross-path warning system uses wide-angle radar in the rear bumper to alert the driver to vehicles approaching from the side, helping the driver avoid collisions. The 911 doesn’t offer a cross-path warning system.

The M8’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 911 doesn’t offer a driver alert monitor.

Both the M8 and the 911 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, post-collision automatic braking systems, daytime running lights, rearview cameras and available blind spot warning systems.

The BMW M8 weighs 613 to 1444 pounds more than the Porsche 911. The NHTSA advises that heavier cars are much safer in collisions than their significantly lighter counterparts.

Warranty Comparison

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BMW pays for scheduled maintenance on the M8 for 2 years and 26000 miles longer than Porsche pays for maintenance for the 911 (3/36,000 vs. 1/10,000).

There are over 82 percent more BMW dealers than there are Porsche dealers, which makes it much easier should you ever need service under the M8’s warranty.

Reliability Comparison

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From surveys of all its subscribers, Consumer Reports’ December 2018 Auto Issue reports that BMW vehicles are more reliable than Porsche vehicles. Consumer Reports ranks BMW 3 places higher in reliability than Porsche.

Engine Comparison

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The M8 has more powerful engines than the 911:

Horsepower

Torque

M8 4.4 turbo V8

600 HP

553 lbs.-ft.

M8 Competition 4.4 turbo V8

617 HP

553 lbs.-ft.

911 3.0 turbo 6 cyl.

370 HP

331 lbs.-ft.

911 S 3.0 turbo 6 cyl.

420 HP

368 lbs.-ft.

911 GTS 3.0 turbo 6 cyl.

450 HP

405 lbs.-ft.

911 GT3 4.0 DOHC 6 cyl.

500 HP

339 lbs.-ft.

911 GT3 RS 4.0 DOHC 6 cyl.

520 HP

346 lbs.-ft.

911 Turbo 3.8 turbo 6 cyl.

540 HP

523 lbs.-ft.

911 Turbo S 3.8 turbo 6 cyl.

580 HP

553 lbs.-ft.

911 Turbo S Exclusive Series 3.8 turbo 6 cyl.

607 HP

553 lbs.-ft.

Fuel Economy and Range Comparison

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The M8 has 3.2 gallons more fuel capacity than the 911 RWD’s standard fuel tank (20.1 vs. 16.9 gallons), for longer range between fill-ups.

Brakes and Stopping Comparison

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For better stopping power the M8’s standard brake rotors are larger than those on the 911:

M8

911

Front Rotors

15.6 inches

13 inches

Rear Rotors

15 inches

13 inches

Tires and Wheels Comparison

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For better traction, the M8 has larger front tires than the 911 (275/35R20 vs. 235/40R19). The M8’s front tires are larger than the largest tires available on the 911 (275/35R20 vs. 265/35R20).

The M8’s tires provide better handling because they have a lower 35 series profile (height to width ratio) that provides a stiffer sidewall than the 911’s standard 40 series front tires.

For better ride, handling and brake cooling the M8 has standard 20-inch wheels. Smaller 19-inch wheels are standard on the 911.

Suspension and Handling Comparison

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For a smoother ride and more stable handling, the M8’s wheelbase is 14.8 inches longer than on the 911 (111.3 inches vs. 96.5 inches). The M8’s wheelbase is 14.6 inches longer than on the 911 GT3 (111.3 inches vs. 96.7 inches).

For better handling and stability, the track (width between the wheels) on the M8 is 2.8 inches wider in the front and 3.1 inches wider in the rear than the average track on the 911.

The M8’s front to rear weight distribution is more even (55.2% to 44.8%) than the 911’s (40.1% to 59.9%). This gives the M8 more stable handling and braking.

Passenger Space Comparison

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Because it has more passenger and cargo room, the EPA rates the M8 Coupe a Subcompact car, while the 911 Coupe is rated a Minicompact. The EPA rates the M8 Convertible a Subcompact car, while the 911 Cabriolet is rated a Minicompact.

The M8 Coupe has 11 cubic feet more passenger volume than the 911 Coupe (81 vs. 70). The M8 Convertible has 13 cubic feet more passenger volume than the 911 Cabriolet (81 vs. 68).

The M8 Coupe has .9 inches more front headroom, 6.4 inches more front shoulder room, 2.6 inches more rear headroom and 4.5 inches more rear legroom than the 911 Coupe.

The M8 Convertible has .9 inches more front headroom, 6.4 inches more front shoulder room and 3.7 inches more rear headroom than the 911 Cabriolet.

Cargo Capacity Comparison

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The M8 Coupe has a much larger trunk than the 911 Coupe with its rear seat up (14.8 vs. 5.1 cubic feet). The M8 has a much larger trunk with its rear seat folded than the 911 Coupe with its rear seat folded (14.8 vs. 9.1 cubic feet).

The M8 Convertible has a much larger trunk with its top down than the 911 Cabriolet (12.4 vs. 5.1 cubic feet).

To make loading groceries and cargo easier when your hands are full, the M8’s trunk can be opened and closed just by kicking your foot under the back bumper, leaving your hands completely free. The 911 doesn’t offer a hands-free gesture to open its trunk, forcing you to put cargo down if your hands are full.

Ergonomics Comparison

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The M8 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 911 doesn’t offer a remote starting system.

The M8’s 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 911.

The M8 has a standard heads-up display that projects speed and other key instrumentation readouts in front of the driver’s line of sight, allowing drivers to view information without diverting their eyes from the road. The 911 doesn’t offer a heads-up display.

If the windows are left open on the M8 the driver can close them all at the outside door handle. On a hot day the driver can lower the windows from a distance using the keyless remote. The driver of the 911 can only operate the windows from inside the vehicle, with the ignition on.

Comfort Access standard on the M8 allows you to unlock the driver’s door, trunk and start the engine all without removing a key from pocket or purse. This eliminates searching for keys before loading groceries, getting in the vehicle in bad weather or making a hurried start to your trip. The Porsche 911’s available Porsche Entry and Drive doesn’t unlock the trunk.

The M8’s 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 911’s cruise control switches are unlit, making them difficult to find at night and operate safely.

The M8 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 911.

The M8’s optional Parking Assistant Plus can parallel park by itself, starting, stopping and changing direction automatically. The 911 doesn’t offer an automated parking system.

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