2020 Chevrolet Corvette vs. 2020 Porsche 718 Cayman

Detailed Review, Specifications & Comparison

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Safety

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To help make backing safer, the Corvette’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 718 Cayman doesn’t offer a cross-path warning system.

Both the Corvette and the 718 Cayman have standard driver and passenger frontal airbags, front side-impact airbags, four-wheel antilock brakes, traction control, electronic stability systems to prevent skidding, daytime running lights, rearview cameras and available blind spot warning systems.

Warranty

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Chevrolet’s powertrain warranty covers the Corvette 1 year and 10,000 miles longer than Porsche covers the 718 Cayman. Any repair needed on the engine, transmission, axles, joints or driveshafts is fully covered for 5 years or 60,000 miles. Coverage on the 718 Cayman ends after only 4 years or 50,000 miles.

There are over 15 times as many Chevrolet dealers as there are Porsche dealers, which makes it much easier should you ever need service under the Corvette’s warranty.

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 Chevrolet vehicles are better in initial quality than Porsche vehicles. J.D. Power ranks Chevrolet 6th in initial quality, above the industry average. With 11 more problems per 100 vehicles, Porsche is ranked 15th, below the industry average.

Engine

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The Corvette has more powerful engines than the 718 Cayman:

Horsepower

Torque

Corvette 6.2 V8

490 HP

470 lbs.-ft.

Corvette Z51 6.2 V8

495 HP

470 lbs.-ft.

718 Cayman 2.0 turbo 4-cylinder

300 HP

280 lbs.-ft.

718 Cayman S 2.5 turbo 4-cylinder

350 HP

309 lbs.-ft.

718 Cayman GT4 4.0 GT3 6-cylinder

414 HP

309 lbs.-ft.

As tested in Car and Driver the Corvette Z51 is faster than the 718 Cayman S 2.5 turbo 4-cylinder (automatics tested):

Corvette

718 Cayman

Zero to 60 MPH

2.8 sec

3.6 sec

Quarter Mile

11.2 sec

12 sec

Fuel Economy and Range

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To lower fuel costs and make buying fuel easier, the Chevrolet Corvette uses regular unleaded gasoline (premium recommended for maximum performance). The 718 Cayman requires premium, which can cost 20 to 55 cents more per gallon.

The Corvette has 4.3 gallons more fuel capacity than the 718 Cayman’s standard fuel tank (18.5 vs. 14.2 gallons), for longer range between fill-ups. The Corvette has 1.6 gallons more fuel capacity than the 718 Cayman’s optional fuel tank (18.5 vs. 16.9 gallons).

The Corvette has a standard cap-less fueling system. The fuel filler is automatically opened when the fuel nozzle is inserted and automatically closed when it’s removed. This eliminates the need to unscrew and replace the cap and it reduces fuel evaporation, which causes pollution. The 718 Cayman doesn’t offer a cap-less fueling system.

Transmission

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The Chevrolet Corvette comes standard with an automatic transmission, for driver comfort, especially in the city. Automatic costs extra on the 718 Cayman.

An eight-speed automatic (SMG) is standard on the Chevrolet Corvette, for better acceleration and lower engine speed on the highway. Only a seven-speed automatic is available for the 718 Cayman.

Brakes and Stopping

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The Corvette stops shorter than the 718 Cayman:

Corvette

718 Cayman

60 to 0 MPH

97 feet

100 feet

Motor Trend

Tires and Wheels

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For better traction, the Corvette has larger tires than the 718 Cayman (F:245/35R19 & R:305/30R20 vs. F:235/45R18 & R:265/45R18).

The Corvette’s 245/35R19 front and 305/30R20 rear tires provide better handling because they have a lower 35 series front and 30 series rear profile (height to width ratio) that provides a stiffer sidewall than the 718 Cayman’s standard 45 series tires.

For better ride, handling and brake cooling the Corvette has standard 19-inch front and 20-inch rear wheels. Smaller 18-inch wheels are standard on the 718 Cayman.

The Corvette has a standard easy tire fill system. When inflating the tires, the vehicle’s integrated tire pressure sensors keep track of the pressure as the tires fill and tell the driver when the tires are inflated to the proper pressure. The 718 Cayman doesn’t offer vehicle monitored tire inflation.

Changing a flat tire near traffic can be dangerous and inconvenient. The run-flat tires standard on the Corvette can be driven up to 50 miles without any air pressure, allowing you to drive to a service station for a repair. The 718 Cayman doesn’t offer run-flat tires.

Suspension and Handling

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For a smoother ride and more stable handling, the Corvette’s wheelbase is 9.8 inches longer than on the 718 Cayman (107.2 inches vs. 97.4 inches).

For better handling and stability, the track (width between the wheels) on the Corvette is 4.9 inches wider in the front and 2 inches wider in the rear than the average track on the 718 Cayman.

The Corvette Coupe handles at 1.03 G’s, while the 718 Cayman pulls only 1.00 G’s of cornering force in a Car and Driver skidpad test.

The Corvette Coupe executes Motor Trend’s “Figure Eight” maneuver quicker than the 718 Cayman (23.3 seconds @ .9 average G’s vs. 24 seconds @ .81 average G’s).

Chassis

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The Corvette’s standard power retractable hardtop allows a seamless transition from an open car, to a completely sealed coupe. The 718 Cayman doesn’t offer a retractable hardtop.

The Corvette LS/LT/ACTIV/RS uses computer-generated active noise cancellation to help remove annoying noise and vibration from the passenger compartment, especially at low frequencies. The 718 Cayman doesn’t offer active noise cancellation.

As tested by Car and Driver, the interior of the Corvette Coupe is quieter than the 718 Cayman GT4:

Corvette

718 Cayman

At idle

47 dB

58 dB

Full-Throttle

92 dB

93 dB

70 MPH Cruising

74 dB

77 dB

Passenger Space

© 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 2020/09/28

The Corvette has 3 cubic feet more passenger volume than the 718 Cayman (51 vs. 48).

The Corvette has .6 inches more front legroom and 3.1 inches more front shoulder room than the 718 Cayman.

Servicing Ease

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The Corvette has a standard under hood light to help in making nighttime maintenance checks, adding fluids, etc. The 718 Cayman doesn’t offer an under hood light.

Ergonomics

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The Corvette 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 Cayman doesn’t offer a remote starting system.

Unlike the driver-only memory system optional in the 718 Cayman, the Corvette offers an optional driver and passenger memory, so that when drivers switch, the memory setting adjusts the driver’s seat, steering wheel position, suspension setting and outside mirror angle and the front passenger seat also adjusts to the new passenger’s preset preferences.

The Corvette offers an optional 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 718 Cayman doesn’t offer a heads-up display.

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

To shield the driver and front passenger’s vision over a larger portion of the windshield and side windows, the Corvette has standard extendable sun visors. The 718 Cayman doesn’t offer extendable visors.

The Corvette has a standard dual zone air conditioning allows the driver and front passenger to choose two completely different temperatures so people with different temperature preferences won’t have to compromise. This makes both the driver and front passenger as comfortable as possible. Dual zone air conditioning costs extra on the 718 Cayman.

To quickly and conveniently keep personal devices charged without cables tangling and wearing out, the Chevrolet Corvette offers an optional wireless phone charging system (Qi) in the center console. The 718 Cayman doesn’t offer wireless personal charging.

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 2020/09/28

A group of representative automotive journalists from North America selected the Corvette as the 2020 North American Car of the Year. The 718 Cayman has never been chosen.

The Chevrolet Corvette outsold the Porsche 718 by almost five to one during 2019.

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