Certified Benz & Beemer Compares 2015 Porsche 911 VS 2015 Chevrolet Corvette Near Scottsdale, AZ

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2015 Porsche 911

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VS

2015 Chevrolet Corvette

Safety Comparison

The 911 offers optional Porsche Active Safe, 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 911 offers all-wheel drive to maximize traction under poor conditions, especially in ice and snow. The Corvette doesn’t offer all-wheel drive.

Both the 911 and the Corvette have standard driver and passenger frontal airbags, front side-impact airbags, side-impact head airbags, front seatbelt pretensioners, plastic fuel tanks, four-wheel antilock brakes, traction control and electronic stability systems to prevent skidding.

Warranty Comparison

The 911 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 911’s corrosion warranty is 4 years and unlimited miles longer than the Corvette’s (10/unlimited vs. 6/100,000).

Reliability Comparison

For smoother operation, better efficiency and fewer moving parts, the engines in the 911 have an overhead cam design, rather than the old pushrod design of the engines in the Corvette.

J.D. Power and Associates rated the 911 first among midsize premium sporty cars in their 2013 Initial Quality Study. The Corvette isn’t in the top three.

J.D. Power and Associates’ 2014 Initial Quality Study of new car owners surveyed provide the statistics that show that Porsche vehicles are better in initial quality than Chevrolet vehicles. J.D. Power ranks Porsche first in initial quality, above the industry average. With 32 more problems per 100 vehicles, Chevrolet is ranked 6th.

J.D. Power and Associates’ 2014 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 9th in reliability, above the industry average. With 7 more problems per 100 vehicles, Chevrolet is ranked 13th.

Engine Comparison

The flat cylinder configuration of the boxer engine in the 911 lowers its center of gravity, enhancing handling stability. The Corvette doesn’t offer a boxer engine configuration.

Fuel Economy and Range Comparison

Regenerative brakes improve the 911’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 911 (except GT3)’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.

The 911 GT3’s optional fuel tank has 5.2 gallons more fuel capacity than the Corvette (23.7 vs. 18.5 gallons).

Brakes and Stopping Comparison

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

911

911 Turbo/GT3

911 Turbo/GT3 opt.

Corvette

Corvette opt.

Corvette Z06

Front Rotors

13 inches

15 inches

16.1 inches

12.6 inches

13.6 inches

15.5 inches

Rear Rotors

13 inches

15 inches

15.4 inches

13.3 inches

13.3 inches

15.3 inches

The 911 stops much shorter than the Corvette:

911

Corvette

70 to 0 MPH

135 feet

146 feet

Car and Driver

60 to 0 MPH

93 feet

104 feet

Motor Trend

Tires and Wheels Comparison

For better ride, handling and brake cooling the 911 has standard 19-inch wheels. Smaller 18-inch front wheels are standard on the Corvette. The 911’s optional 20-inch wheels are larger than the 19-inch front wheels and 20-inch rear wheels optional on the Corvette.

Suspension and Handling Comparison

The 911 offers active sway bars, which help keep it flat and controlled during cornering, but disconnect at lower speeds to smooth the ride. This helps keep the tires glued to the road. The Corvette doesn’t offer an active sway bar system.

The front and rear suspension of the 911 uses coil springs for better ride, handling and control than the Corvette, which uses transverse leafs springs. Coil springs compress more progressively and offer more suspension travel for a smoother ride with less bottoming out.

The 911 GT3 Coupe handles at 1.12 G’s, while the Corvette Stingray Coupe pulls only 1.03 G’s of cornering force in a Car and Driver skidpad test.

The 911 S Cabriolet handles at 1.03 G’s, while the Corvette Stingray Convertible pulls only 1.00 G’s of cornering force in a Car and Driver skidpad test.

The 911 Turbo S Coupe executes Motor Trend’s “Figure Eight” maneuver quicker than the Corvette Stingray Coupe (23 seconds @ .93 average G’s vs. 23.9 seconds @ .82 average G’s).

For better maneuverability, the 911 Turbo/GT3’s turning circle is 2.9 feet tighter than the Corvette’s (34.8 feet vs. 37.7 feet). The 911’s turning circle is 1.3 feet tighter than the Corvette’s (36.4 feet vs. 37.7 feet).

Chassis Comparison

The Porsche 911 may be more efficient, handle and accelerate better because it weighs up to about 250 pounds less than the Chevrolet Corvette.

As tested by Car and Driver, the interior of the 911 Coupe is quieter than the Corvette Stingray Coupe:

911

Corvette

At idle

29 dB

55 dB

Full-Throttle

86 dB

92 dB

As tested by Car and Driver, the interior of the 911 S Cabriolet is quieter than the Corvette Stingray Convertible:

911

Corvette

At idle

49 dB

55 dB

70 MPH Cruising

72 dB

73 dB

Passenger Space Comparison

The 911 has standard seating for 4 passengers; the Corvette can only carry 2.

The 911 Coupe has 18 cubic feet more passenger volume than the Corvette (70 vs. 52).

The 911 Coupe has .1 inches more front headroom and 2.8 inches more front legroom than the Corvette Coupe.

Cargo Capacity Comparison

A low lift-over trunk design makes loading and unloading the 911 easier. The 911’s trunk lift-over height is 24.3 inches, while the Corvette’s liftover is 41.2 inches.

Ergonomics Comparison

The 911’s rain-sensitive wipers adjust their speed and turn on and off automatically based on the amount of rainfall on the windshield. This allows the driver to concentrate on driving without constantly adjusting the wipers. The Corvette’s manually variable intermittent wipers have to be constantly adjusted.

Heated windshield washer nozzles are standard on the 911 to prevent washer fluid and nozzles from freezing and help continue to keep the windshield clear in sub-freezing temperatures. The Corvette doesn’t offer heated windshield washer nozzles.

To improve rear visibility by keeping the rear window clear, the 911 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 911 offers available headlight washers to keep headlight output high. The Corvette doesn’t offer headlight washers.

To help drivers see further while navigating curves, the 911 offers optional adaptive headlights to illuminate around corners automatically by reading vehicle speed and steering wheel angle. The Corvette doesn’t offer cornering lights.

The 911’s power mirror controls are mounted on the armrest for easy access. The Corvette’s power mirror controls are on the dash, hidden behind the steering wheel, where they are awkward to manipulate.

On extremely cold Winter days, the 911’s optional heated steering wheel provides comfort, allowing the driver to steer safely and comfortably before the car heater warms up. The Corvette doesn’t offer a heated steering wheel.

To keep a safe, consistent following distance, the 911 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 Comparison

Motor Trend performed a comparison test in its December 2013 issue and the Porsche 911 S Carrera 4 Coupe won out over the Chevrolet Corvette Stingray Coupe.

J.D. Power and Associates rated the 911 first among midsize premium sporty cars in owner reported satisfaction. This includes how well the vehicle performs and satisfies its owner’s expectations. The Corvette was rated second.

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