Lithia Auto Stores

Compare the2023 BMW M4VS 2022 Porsche 911

2023 BMW M4
2022 Porsche 911

Safety

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The M4’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.

The BMW M4 has standard driver and front passenger side knee airbags mounted low on the dashboard. These airbags helps prevent the driver and front passenger from sliding under their seatbelts or the main frontal airbags; this keeps them better positioned during a collision for maximum protection. Knee airbags also help keep the legs from striking the dashboard, preventing knee and leg injuries in the case of a serious frontal collision. The 911 doesn’t offer knee airbags.

The M4 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 911 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.

Over 200 people are killed each year when backed over by motor vehicles. The M4 offers optional Active Park Distance Control that uses rear sensors to monitor and automatically apply the brakes to prevent a rear collision. The 911 doesn’t offer backup collision prevention brakes.

The M4’s standard 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. A lane departure warning system costs extra on the 911.

The M4 has a standard blind spot warning system which 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 911’s blind spot costs extra.

To help make backing out of a parking space safer, the M4 has a standard rear cross-path warning system, which uses sensors in the rear bumper to alert the driver to vehicles approaching from the side, helping the driver avoid collisions. Rear cross-path warning costs extra on the 911.

The M4’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 M4 and the 911 have standard driver and passenger frontal airbags, front side-impact 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 and available around view monitors.

Warranty

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BMW pays for scheduled maintenance on the M4 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 80 percent more BMW dealers than there are Porsche dealers, which makes it much easier should you ever need service under the M4’s warranty.

Reliability

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J.D. Power and Associates’ 2022 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 above average in initial quality. With 35 more problems per 100 vehicles, Porsche is rated below average.

Engine

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The M4 has more powerful engines than the 911:

Horsepower

Torque

M4 3.0 turbo 6-cylinder

473 HP

406 lbs.-ft.

M4 Competition 3.0 turbo 6-cylinder

503 HP

479 lbs.-ft.

M4 CSL 3.0 turbo 6-cylinder

543 HP

479 lbs.-ft.

911 3.0 turbo 6-cylinder

379 HP

331 lbs.-ft.

911 S 3.0 turbo 6-cylinder

443 HP

390 lbs.-ft.

911 GTS 3.0 turbo 6-cylinder

473 HP

420 lbs.-ft.

911 GT3 4.0 DOHC 6-cylinder

502 HP

346 lbs.-ft.

Fuel Economy and Range

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On the EPA test cycle the M4 Coupe gets better mileage than the 911 Coupe:

MPG

M4 Coupe

RWD

Manual

3.0 turbo 6-cyl.

16 city/23 hwy

Auto

3.0 turbo 6-cyl.

16 city/23 hwy

Auto

3.0 turbo 6-cyl.

16 city/22 hwy

911 Coupe

RWD

Manual

4.0 DOHC flat-6

14 city/18 hwy

Auto

4.0 DOHC flat-6

15 city/18 hwy

AWD

Auto

Turbo S 3.7 turbo flat-6

15 city/20 hwy

Turbo 3.7 turbo flat-6

15 city/20 hwy

On the EPA test cycle the M4 Convertible gets better mileage than the 911 Cabriolet:

MPG

M4 Convertible

AWD

Auto

3.0 turbo 6-cyl.

16 city/23 hwy

911 Cabriolet

AWD

Auto

Turbo S 3.7 turbo flat-6

15 city/20 hwy

Turbo 3.7 turbo flat-6

15 city/20 hwy

Regenerative brakes improve the M4’s fuel efficiency by converting inertia back into energy instead of wasting it. The 911 doesn’t offer a regenerative braking system.

Brakes and Stopping

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For better stopping power the M4’s standard brake rotors are larger than those on the 911:

M4

911

Front Rotors

15 inches

13 inches

Rear Rotors

14.6 inches

13 inches

Tires and Wheels

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For better traction, the M4 has larger front tires than the 911 (275/40R18 vs. 235/40R19). The M4’s front tires are larger than the largest tires available on the 911 (275/40R18 vs. 255/35R20).

Suspension and Handling

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For a smoother ride and more stable handling, the M4’s wheelbase is 16 inches longer than on the 911 (112.5 inches vs. 96.5 inches). The M4’s wheelbase is 15.8 inches longer than on the 911 GT3 (112.5 inches vs. 96.7 inches).

For better handling and stability, the track (width between the wheels) on the M4 is 1.1 inches wider in the front and 1.6 inches wider in the rear than the average track on the 911.

The M4’s front to rear weight distribution is more even (51% to 49%) than the 911’s (39.5% to 60.5%). This gives the M4 more stable handling and braking.

Chassis

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The M4’s standard power retractable hardtop allows a seamless transition from an open car, to a completely sealed coupe. The 911 doesn’t offer a retractable hardtop.

As tested by Car and Driver, the interior of the M4 Coupe is quieter than the 911 Turbo S Coupe:

M4

911

At idle

45 dB

58 dB

Full-Throttle

83 dB

99 dB

70 MPH Cruising

69 dB

76 dB

Passenger Space

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Because it has more passenger and cargo room, the EPA rates the M4 Coupe a Compact car, while the 911 Coupe is rated a Minicompact.

The M4 Coupe has 18 cubic feet more passenger volume than the 911 (91 vs. 73).

The M4 Coupe has 2.4 inches more front headroom, 2.5 inches more front shoulder room, 3.3 inches more rear headroom, 7.5 inches more rear legroom and 3.1 inches more rear shoulder room than the 911 Coupe.

Cargo Capacity

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The M4 Coupe has a much larger trunk than the 911 Coupe with its rear seat up (12 vs. 4.6 cubic feet).

The M4 Convertible has a much larger trunk with its top down than the 911 Cabriolet with its top down (10.6 vs. 4.6 cubic feet). The M4 Convertible has a much larger trunk with its top up than the 911 Cabriolet with its top up (13.6 vs. 10.4 cubic feet).

With its coupe body style, valet key, locking rear seatbacks and remote trunk release lockout, the M4 offers cargo security. The 911’s non-lockable folding seat defeats cargo security.

To make loading and unloading groceries and cargo easier when your hands are full, the M4’s trunk can be opened just by kicking your foot under the back bumper, leaving your hands completely free. The M4 also offers an optional power trunk, which opens and closes automatically by pressing a button. The 911 doesn’t offer a power or hands-free opening trunk.

Ergonomics

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The M4 (except Manual) offers a 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 M4 offers an optional 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 911 doesn’t offer a heads-up display.

If the windows are left open on the M4 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 911 can only operate the windows from inside the vehicle, with the ignition on.

In case of a sudden change of weather, the M4 has a standard remote convertible top that can be raised from a distance to protect the interior of the vehicle from damage. On a hot day the M4 has a standard remote opening feature, to lower the top from outside. The 911 doesn’t offer a remote top, so the driver will have to run to the car, get in, turn the ignition on and raise the top to prevent the interior from being damaged.

To quickly and conveniently keep personal devices charged without cables tangling and wearing out, the BMW M4 offers an optional wireless phone charging system (Qi) in the center console. The 911 doesn’t offer wireless personal charging.

Recommendations

© 1999 - 2024Advanta-STAR Automotive Research, all rights reserved. This vehicle comparison and all of the content in it are provided only by license from Advanta-STAR Automotive Research Corporation of America (“Advanta-STAR”). If you are not a legally licensed user of this vehicle comparison, it is against federal law to access it, copy it, forward it, or use it in any manner whatsoever. Any unauthorized use of this vehicle comparison is a violation of U.S. and international law and is punishable criminally and civilly. Removal of this watermark/notification without prior written license and approval received from Advanta-STAR is an agreement, understanding, and/or stipulation by the person(s), entities, agents, attorneys, and any other persons involved in the removal of this watermark/notification (including but not limited to Search Optics, LLC and any and all parent entities, sister entities, and subsidiary entities of Search Optics, LLC and/or any other entity, agent, attorney, and persons related in any manner to Search Optics, LLC) to: 1) an agreed upon amount of liquidated monetary damages of a minimum of $1,250,000.00 US Dollars in favor of Advanta-STAR; 2) the jurisdiction and enforcement of any legal claims associated with this matter asserted by Advanta-STAR in the United States Federal District Court in Portand, Oregon; and 3) service of process of any legal claims asserted by Advanta-STAR associated with this matter may be accomplished by First-Class Postage by the United States Postal Service or comparable service. XPYNN-M34HG 2a06:98c0:3600::103 2024/04/13

The 4 Series was chosen as one of Car and Driver’s “Top Ten” in 2014. The 911 has never been a Car and Driver “Top Ten” pick.

The M3/M4 was chosen as one of Automobile Magazine’s “All Stars” for 13 of the last 26 years. The 911 has never been an “All Star.”

The BMW 4 Series outsold the Porsche 911 by over two to one during the 2021 model year.

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