Both the 718 Boxster and the M4 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 crash mitigating brakes and blind spot warning systems.
Compare the2022 Porsche 718 BoxsterVS 2022 BMW M4


Safety
Reliability
J.D. Power and Associates rated the 718 Boxster second among compact premium sporty cars in their 2021 Initial Quality Study. The M4 isn’t in the top three in its category.
J.D. Power and Associates’ 2021 Initial Quality Study of new car owners surveyed provide the statistics that show that Porsche vehicles are better in initial quality than BMW vehicles. J.D. Power ranks Porsche 15th in initial quality. With 3 more problems per 100 vehicles, BMW is ranked 20th.
J.D. Power and Associates’ 2021 survey of the owners of three-year-old vehicles provides the long-term dependability statistics that show that Porsche vehicles are more reliable than BMW vehicles. J.D. Power ranks Porsche second in reliability, above the industry average. With 22 more problems per 100 vehicles, BMW is ranked 10th.
From surveys of all its subscribers, Consumer Reports’ January 2021 Auto Issue reports that Porsche vehicles are more reliable than BMW vehicles. Consumer Reports ranks Porsche 3 places higher in reliability than BMW.
Engine
The flat cylinder configuration of the boxer engine in the 718 Boxster lowers its center of gravity, enhancing handling stability. The M4 doesn’t offer a boxer engine configuration.
Fuel Economy and Range
On the EPA test cycle the 718 Boxster gets better mileage than the M4 Convertible:
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MPG |
718 Boxster |
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RWD |
Manual |
2.0 turbo flat-4 |
20 city/26 hwy |
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2.5 turbo flat-4 |
19 city/24 hwy |
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GTS 4.0 4.0 DOHC flat-6 |
17 city/24 hwy |
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718 Spyder 4.0 DOHC flat-6 |
17 city/23 hwy |
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Auto |
2.0 turbo flat-4 |
21 city/27 hwy |
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2.5 turbo flat-4 |
19 city/25 hwy |
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GTS 4.0 4.0 DOHC flat-6 |
19 city/24 hwy |
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718 Spyder 4.0 DOHC flat-6 |
18 city/24 hwy |
M4 Convertible |
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RWD |
Manual |
3.0 turbo 6-cyl. |
16 city/23 hwy |
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Auto |
3.0 turbo 6-cyl. |
16 city/23 hwy |
AWD |
Auto |
3.0 turbo 6-cyl. |
16 city/23 hwy |
An engine control system that can shut down some of the engine’s cylinders helps improve the 718 Boxster GTS 4.0/Spyder’s fuel efficiency. The M4 doesn’t offer a system that can shut down part of the engine.
The 718 Boxster’s optional fuel tank has 1.3 gallons more fuel capacity than the M4 (16.9 vs. 15.6 gallons).
Transmission
The 718 Boxster offers an optional sequential manual gearbox (SMG). With no clutch pedal to worry about and a fully automatic mode, an SMG is much more efficient than a conventional automatic but just as easy to drive. The M4 doesn’t offer an SMG.
Brakes and Stopping
The 718 Boxster stops shorter than the M4:
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718 Boxster |
M4 |
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70 to 0 MPH |
143 feet |
146 feet |
Car and Driver |
Tires and Wheels
For better ride, handling and brake cooling the 718 Boxster offers optional 20-inch wheels. The M4’s largest wheels are only 19-inches in the front and 20-inches in the rear.
Suspension and Handling
For better maneuverability, the 718 Boxster’s turning circle is 3.9 feet tighter than the M4’s (36.1 feet vs. 40 feet). The 718 Spyder’s turning circle is 2.5 feet tighter than the M4’s (37.5 feet vs. 40 feet).
Chassis
The Porsche 718 Boxster may be more efficient, handle and accelerate better because it weighs about 800 to 1050 pounds less than the BMW M4.
The 718 Boxster is 1 foot, 4.7 inches shorter than the M4, making the 718 Boxster easier to handle, maneuver and park in tight spaces.
To almost totally eliminate engine vibration in the passenger area, the 718 Boxster w/Sport Chrono has an electronically controlled liquid-filled front engine mount and conventional liquid-filled engine mounts (standard liquid front mount on other versions of the 718 Boxster). A computer-controlled electric current in the liquid changes its viscosity, allowing the mount to dampen the engine completely at all RPMs. The M4 uses conventional solid rubber engine mounts.
Servicing Ease
J.D. Power and Associates surveys of service recipients show that Porsche service is better than BMW. J.D. Power ranks Porsche first in service department satisfaction. With a 33% lower rating, BMW is ranked 8th.
Ergonomics
The 718 Boxster’s optional easy entry system raises the steering wheel and glides the driver’s seat back when the door is unlocked or the ignition is switched off, making it easier for the driver to get in and out. The M4 doesn’t offer an easy entry system.
The 718 Boxster’s instruments include an oil pressure gauge and a temperature gauge - which could save your engine! Often ‘idiot lights’ don’t warn you until damage has been done. The M4 has neither an oil pressure gauge nor a temperature gauge.
In poor weather, headlights can lose their effectiveness as grime builds up on their lenses. This can reduce visibility without the driver realizing. The 718 Boxster has standard headlight washers to keep headlight output high. The M4 doesn’t offer headlight washers.
Recommendations
Consumer Reports® recommends the Porsche 718 Boxster, based on reliability, safety and performance.
The Boxster/Cayman was chosen as one of Car and Driver’s “Top Ten” for 16 of the last 17 years. The 4 Series hasn’t been picked since 2014.