2020 Porsche 718 Cayman vs. 2020 BMW M2

Detailed Review, Specifications & Comparison

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Safety

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The 718 Cayman’s optional blind spot warning system uses digital cameras monitored by computer to alert the driver to moving objects in the vehicle’s blind spots where the side view mirrors don’t reveal them. The M2 doesn’t offer a system to reveal objects in the driver’s blind spots.

Both the 718 Cayman and the M2 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 and available crash mitigating brakes.

Reliability

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J.D. Power and Associates’ 2019 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 6 more problems per 100 vehicles, BMW is ranked 20th.

J.D. Power and Associates’ 2019 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 14 more problems per 100 vehicles, BMW is ranked 7th.

From surveys of all its subscribers, Consumer Reports’ December 2019 Auto Issue reports that Porsche vehicles are more reliable than BMW vehicles. Consumer Reports ranks Porsche fourth in reliability. BMW is ranked 17th.

Engine

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As tested in Car and Driver the Porsche 718 Cayman 2.0 is faster than the M2 Competition (automatics tested):

718 Cayman

M2

Zero to 60 MPH

3.9 sec

4 sec

Zero to 80 MPH

6.3 sec

9.1 sec

The flat cylinder configuration of the boxer engine in the 718 Cayman lowers its center of gravity, enhancing handling stability. The M2 doesn’t offer a boxer engine configuration.

Fuel Economy and Range

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On the EPA test cycle the 718 Cayman gets better fuel mileage than the M2:

MPG

718 Cayman

Manual

2.0 turbo 4-cyl.

21 city/28 hwy

S 2.5 turbo 4-cyl.

20 city/26 hwy

Auto

2.0 turbo 4-cyl.

22 city/29 hwy

S 2.5 turbo 4-cyl.

21 city/28 hwy

M2

Manual

3.0 turbo 6-cyl.

18 city/25 hwy

Auto

3.0 turbo 6-cyl.

17 city/23 hwy

The 718 Cayman’s optional fuel tank has 3.2 gallons more fuel capacity than the M2 (16.9 vs. 13.7 gallons).

Brakes and Stopping

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For better stopping power the 718 Cayman GT4’s optional brake rotors are larger than those on the M2:

718 Cayman GT4

M2

Front Rotors

16.1 inches

15.7 inches

Rear Rotors

15.4 inches

15 inches

The 718 Cayman stops much shorter than the M2:

718 Cayman

M2

70 to 0 MPH

141 feet

155 feet

Car and Driver

60 to 0 MPH

97 feet

106 feet

Motor Trend

Tires and Wheels

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The 718 Cayman’s optional 305/30R20 rear tires provide better handling because they have a lower 30 series profile (height to width ratio) that provides a stiffer sidewall than the M2’s 35 series tires.

For better ride, handling and brake cooling the 718 Cayman GTS/T has standard 20-inch wheels. The M2’s largest wheels are only 19-inches.

Suspension and Handling

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The 718 Cayman handles at 1.06 G’s, while the M2 pulls only .99 G’s of cornering force in a Car and Driver skidpad test.

The 718 Cayman S executes Motor Trend’s “Figure Eight” maneuver quicker than the M2 (23.7 seconds @ .89 average G’s vs. 24.1 seconds @ .82 average G’s).

For better maneuverability, the 718 Cayman’s turning circle is 2.3 feet tighter than the M2’s (36.1 feet vs. 38.4 feet). The 718 Cayman GT4’s turning circle is .9 feet tighter than the M2’s (37.5 feet vs. 38.4 feet).

Chassis

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The Porsche 718 Cayman may be more efficient, handle and accelerate better because it weighs about 450 to 550 pounds less than the BMW M2.

The 718 Cayman is 3.8 inches shorter than the M2, making the 718 Cayman easier to handle, maneuver and park in tight spaces.

To almost totally eliminate engine vibration in the passenger area, the 718 Cayman has liquid-filled engine mounts. The liquid helps further dampen engine harshness. The M2 uses conventional solid rubber engine mounts.

As tested by Car and Driver while under full throttle, the interior of the 718 Cayman is quieter than the M2 Competition (84 vs. 87 dB).

Cargo Capacity

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The 718 Cayman has a much larger trunk than the M2 (15 vs. 13.8 cubic feet).

To make loading groceries and cargo easier when your hands are full, just holding your hand near the emblem on the trunk can open the 718 Cayman’s available trunk, leaving your hands completely free. The M2 doesn’t offer a hands-free gesture to open its trunk, forcing you to put cargo down if your hands are full.

Servicing Ease

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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 46% lower rating, BMW is ranked 11th.

Ergonomics

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The 718 Cayman’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 M2 doesn’t offer an easy entry system.

The 718 Cayman’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 M2 has neither an oil pressure gauge nor a temperature gauge.

The 718 Cayman’s power parking brake sets with one touch and releases with one touch. The M2 has a lever-type parking brake that has to be strenuously raised to engage properly. It has to be lifted up more and a button depressed to release it.

To improve rear visibility by keeping the rear window clear, the 718 Cayman offers an optional rear wiper. The M2 doesn’t offer a rear wiper.

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 Cayman offers available headlight washers to keep headlight output high. The M2 doesn’t offer headlight washers.

The 718 Cayman’s sun-visors swivel front-to-side to block glare from the side windows. The M2’s visors are fixed into the windshield header.

Optional air-conditioned seats in the 718 Cayman keep the driver and front passenger comfortable and take the sting out of hot seats in Summer. The M2 doesn’t offer air-conditioned seats.

To keep a safe, consistent following distance, the 718 Cayman PDK offers an optional Adaptive Cruise Control, which alters the speed of the vehicle without driver intervention. This allows the driver to use cruise control more safely without constantly having to disengage it when approaching slower traffic. The M2 doesn’t offer an adaptive cruise control.

Model Availability

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The Porsche 718 comes in coupe and convertible bodystyles; the BMW M2 isn’t available as a convertible.

Economic Advantages

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Insurance will cost less for the 718 Cayman owner. The Complete Car Cost Guide estimates that insurance for the 718 Cayman will cost $4885 to $6630 less than the M2 over a five-year period.

The 718 Cayman will cost the buyer less in the long run because of its superior resale value. The IntelliChoice estimates that the 718 Cayman will retain 59.69% to 60.13% of its original price after five years, while the M2 only retains 47.34%.

IntelliChoice estimates that five-year ownership costs (depreciation, financing, insurance, fuel, fees, repairs and maintenance) for the Porsche 718 Cayman will be $1010 to $17449 less than for the BMW M2.

Recommendations

© 1999 - 2020 Advanta-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. 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. 6IUEX-0KENZ 45.55.47.189 2020/10/21

Motor Trend performed a comparison test in its October 2019 issue and they ranked the Porsche 718 Cayman higher than the BMW M2 Competition.

The Cayman was chosen as one of Car and Driver’s “Top Ten” for 14 of the last 15 years. The M2 hasn’t been picked since 2019.

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