Porsche 911 vs Dodge Viper Compare price, expert/user reviews, mpg, engines, safety, cargo capacity and other specs at a glance.

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User Ranking Drivers and owners ranked these cars in 9 categories.

Used Car Pricing Used listing price comparison and analysis.

2021 Porsche 911
Carrera 4 Cabriolet AWD
CarGurus Instant Market Value
$119,300
2017 Dodge Viper
ACR RWD
CarGurus Instant Market Value
$118,795
2 listings nationwide

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Expert Reviews Reviews from CarGurus experts.

2021 Porsche 911
Carrera 4 Cabriolet AWD
Josh Jacquot Preview:

Entering its second year in the 992 generation, Porsche’s iconic 911 remains one of the most versatile and daily drivable sports cars ever made. Its trims and drive configurations enco...

2017 Dodge Viper
ACR RWD
George Kennedy Preview:

The modern supercar landscape is a space dominated by exotic materials, efficient yet powerful hybrid powertrains, and advanced traction management that can make any driver a hero. But...

User Reviews Reviews from CarGurus users who have driven or owned the car.

2021 Porsche 911
Carrera 4 Cabriolet AWD
No User Reviews
2017 Dodge Viper
ACR RWD
20
heha2100 writes:
it looks cool as crap
Guru5BGJS writes:
Would not have if you gave it to me for free!
5
Frank writes:
Power Ranked 2018 Acura NSX SH-AWD better.
"The Viper is heavy, ponderous, it takes a short while for momentum to build. The NSX is light and the electric motors get it moving immediately and quickly. I love how the turbos, small gas engine, relatively small batteries and electric motors all combine seamlessly to for a flawless acceleration and handling experience. The NSX is everything I want it to be."

Specs

2021 Porsche 911
Carrera 4 Cabriolet AWD
2017 Dodge Viper
ACR RWD
Powertrain 8-Speed Dual Clutch 6-Speed Manual
Drivetrain
AWD
RWD
Fuel Economy, City
18 MPG
12 MPG
Fuel Economy, Highway
24 MPG
19 MPG
Fuel Tank Volume 17.6 gal 16 gal
Engine
Fuel Type
Gasoline
Gasoline
Power
379 hp @ 6,500 RPM
645 hp @ 6,150 RPM
Torque
331 lb-ft @ 1,950 RPM
600 lb-ft @ 4,950 RPM
Cylinders
6 cylinders
10 cylinders
Compression Ratio
10.2:1
10.2:1
Displacement
3,000 cc
8,400 cc
Bore x Stroke
3.58 in x 3.01 in
4.05 in x 3.96 in
Safety
ABS Brakes Standard Standard
Driver Airbag Standard Standard
Passenger Airbag Standard Standard
Front Side Airbags -- Standard
NHTSA Crash Test Results
Comfort and Convenience
Leather Seats -- Standard
Air Conditioning Standard Standard
Radio Standard Standard
Power Windows Standard Standard
Power Door Locks Standard Standard
Driver Power Seats Standard --
Passenger Power Seats Standard --
Interior
Maximum Seating 4 seats 2 seats
Front Legroom -- 42.7 in
Back Legroom -- --
Payload and Towing
Cargo Volume 4.6 cu ft 14.7 cu ft
Maximum Payload 883 lbs --
Exterior
Length 177.9 in 175.7 in
Width 79.7 in 76.4 in
Height 51.1 in 49.1 in
Wheelbase 96.5 in 98.8 in

Available Options

2021 Porsche 911
Carrera 4 Cabriolet AWD
2017 Dodge Viper
ACR RWD

Exterior Colors

  • Adrenaline Red
  • Billet Silver Metallic Clearcoat
  • Competition Blue
  • GTS-R Blue Pearlcoat
  • Gunmetal Pearl
  • Stryker Orange Tri-Coat Pearl
  • Venom Black Clearcoat
  • Viper White Clearcoat
  • Yorange Clearcoat

Option Packages

  • Carbon Fiber Structural X-Brace
  • Exterior Carbon Fiber Package
  • Carbon Fiber Black Interior Accents
  • Extreme Aero Package
  • ACR Car Cover
  • ACR Extreme Car Cover
  • Adrenaline Red GTS Racing Stripes
  • Billet Silver GTS Racing Stripes
  • Black GTS Racing Stripes
  • Bright White GTS Racing Stripes
  • Center Band Paint Stripe
  • Driver Paint Stripe - Black
  • Driver Paint Stripe - Red
  • Gunmetal GTS Racing Stripes
  • Wheels: 19" x 11" FR/19" x 13" RR ACR Brass Monkey

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