2020 Porsche 718 Cayman vs. 2020 Chevrolet Corvette

Detailed Review, Specifications & Comparison

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Safety

© 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 2020/05/30

The 718 Cayman Auto offers optional Porsche Active Safety, which use forward mounted sensors to warn the driver of a possible collision ahead. If the driver doesn’t react and the system determines a collision is imminent, it automatically applies the brakes at full-force in order to reduce the force of the crash or avoid it altogether. The Corvette doesn't offer collision warning or crash mitigation brakes.

The 718 Cayman has standard ParkAssist to help warn the driver about vehicles, pedestrians or other obstacles behind or in front of their vehicle. The Corvette doesn’t offer a front parking aid.

Both the 718 Cayman and the Corvette 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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The 718 Cayman comes with a full 4-year/50,000-mile basic warranty, which covers the entire car and includes 24-hour roadside assistance. The Corvette’s 3-year/36,000-mile basic warranty expires 1 year and 14,000 miles sooner.

The 718 Cayman’s corrosion warranty is 6 years and unlimited miles longer than the Corvette’s (12/unlimited vs. 6/100,000).

Reliability

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For smoother operation, better efficiency and fewer moving parts, the engines in the 718 Cayman have an overhead cam design, rather than the old pushrod design of the engines in the Corvette.

A reliable vehicle saves its owner time, money and trouble. Nobody wants to be stranded or have to be without a vehicle while it’s being repaired. Consumer Reports rates the 718 Cayman’s reliability 43 points higher than the Corvette.

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 Chevrolet vehicles. J.D. Power ranks Porsche second in reliability, above the industry average. With 7 more problems per 100 vehicles, Chevrolet is ranked fourth.

From surveys of all its subscribers, Consumer Reports’ December 2019 Auto Issue reports that Porsche vehicles are more reliable than Chevrolet vehicles. Consumer Reports ranks Porsche fourth in reliability. Chevrolet is ranked 25th.

Engine

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The flat cylinder configuration of the boxer engine in the 718 Cayman lowers its center of gravity, enhancing handling stability. The Corvette 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 Corvette:

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

Corvette

Auto

6.2 OHV V8

15 city/27 hwy

Z51 6.2 OHV V8

15 city/27 hwy

Regenerative brakes improve the 718 Cayman’s fuel efficiency by converting inertia back into energy instead of wasting it. The Corvette doesn’t offer a regenerative braking system.

In heavy traffic or at stoplights the 718 Cayman’s engine automatically turns off when the vehicle is stopped, saving fuel and reducing pollution. The engine is automatically restarted when the driver gets ready to move again. (Start/Stop isn’t accounted in present EPA fuel mileage tests.) The Corvette doesn’t offer an automatic engine start/stop system.

Brakes and Stopping

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For better stopping power the 718 Cayman’s front brake rotors are larger than those on the Corvette:

718 Cayman

Cayman opt.

Cayman GT4

GT4 opt.

Corvette

Corvette Z51

Front Rotors

13 inches

13.8 inches

15 inches

16.1 inches

12.6 inches

13.3 inches

Rear Rotors

11.8 inches

13.8 inches

15 inches

15.4 inches

13.3 inches

13.8 inches

The 718 Cayman offers optional heat-treated ceramic brake rotors, which last ten to twenty times as long as conventional cast iron rotors, don’t rust, don’t fade during repeated high speed braking, and their lighter weight contribute to better braking, handling and acceleration. The Corvette doesn’t offer ceramic brake rotors.

The 718 Cayman stops shorter than the Corvette:

718 Cayman

Corvette

70 to 0 MPH

141 feet

149 feet

Car and Driver

Tires and Wheels

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

Suspension and Handling

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The 718 Cayman’s front to rear weight distribution is more even (44.7% to 55.3%) than the Corvette’s (40% to 60%). This gives the 718 Cayman more stable handling and braking.

The 718 Cayman handles at 1.06 G’s, while the Corvette Coupe pulls only 1.03 G’s of cornering force in a Car and Driver skidpad test.

For better maneuverability, the 718 Cayman’s turning circle is .3 feet tighter than the Corvette with Magnetic Ride Control’s (36.1 feet vs. 36.4 feet). The 718 Cayman GT4’s turning circle is .6 feet tighter than the Corvette’s (37.5 feet vs. 38.1 feet).

Chassis

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The Porsche 718 Cayman may be more efficient, handle and accelerate better because it weighs about 450 to 500 pounds less than the Chevrolet Corvette.

The 718 Cayman is 9.9 inches shorter than the Corvette, 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 Corvette uses conventional solid rubber engine mounts.

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

718 Cayman

Corvette

Full-Throttle

84 dB

92 dB

70 MPH Cruising

71 dB

74 dB

Cargo Capacity

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The 718 Cayman has a much larger trunk than the Corvette Coupe (15 vs. 12.6 cubic feet).

A low lift-over trunk design makes loading and unloading the 718 Cayman easier. The 718 Cayman’s trunk lift-over height is 32.7 inches, while the Corvette’s liftover is 38.7 inches.

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 Corvette doesn’t offer a hands-free gesture to open its liftgate, 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 Chevrolet. J.D. Power ranks Porsche first in service department satisfaction. With a 48% lower rating, Chevrolet is ranked 13th.

Ergonomics

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The 718 Cayman’s optional wipers adjust their speed and turn on and off automatically according to the amount of rainfall on the windshield. The Corvette’s manually variable intermittent wipers have to be constantly adjusted.

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

While driving with high beams on, sensitive light sensors available for the 718 Cayman detect other vehicles which could be blinded and automatically switch to low beams. The Corvette doesn’t offer automatic dimming high beams.

To help drivers see further while navigating curves, the 718 Cayman offers optional adaptive headlights to illuminate around corners automatically by reading vehicle speed and steering wheel angle. The Corvette doesn’t offer cornering lights.

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 Corvette doesn’t offer an adaptive cruise control.

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 2020/05/30

The 718 Cayman was chosen as one of Automobile Magazine’s “All Stars” for 3 of the last 7 years. The Corvette has never been an “All Star.”

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