Car comparison

Porsche 911 (997) · Facelift 2008 GT2 RS 3.6vsPorsche 911 Cabriolet (991) Turbo 3.8

Compare specs, acceleration, fuel consumption, dimensions, practicality, and estimated running costs side by side.

New comparison

Porsche 911 (997) · Facelift 2008

GT2 RS 3.6

620 hp3600 ccGasolineRWDManualTurbochargedCoupe2010-2012
VS

Porsche 911 Cabriolet (991)

Turbo 3.8

520 hp3800 ccGasolineAWDDual-clutchTwin-turboCabriolet / convertible2013-2016

Comparison overview

Use the estimates as comparison hints and verify exact figures before making decisions.

Best choices

Porsche 911 (997) Facelift 2008 GT2 RS 3.6

  • Quickest 0-100 km/h
    3.5 s
  • Fastest top speed
    330 km/h
    205 mph
  • Most powerful
    620 hp
    462 kW
  • Highest torque
    700 Nm
    516 lb-ft
  • Lightest
    1,370 kg
    3,020 lb
  • Best power-to-weight
    453 hp/t
    337 kW/t
    2.2 kg/hp
  • Best estimated range
    756 km
    470 mi
  • Best overall score
    76/100
  • Best performance score
    93/100

Porsche 911 Cabriolet (991) Turbo 3.8

  • Lowest combined fuel consumption
    9.9 L/100 km
    23.8 mpg US
    28.5 mpg UK
  • Lowest city consumption
    13.4 L/100 km
    17.6 mpg US
    21.1 mpg UK
  • Lowest highway consumption
    7.8 L/100 km
    30.2 mpg US
    36.2 mpg UK
  • Lowest CO2 emissions
    231 g/km
  • Largest trunk
    275 L
  • Best economy score
    80/100
  • Best practicality score
    43/100

Specification comparison

Specification comparison
ModelPorsche911 (997)Facelift 2008GT2 RS 3.6Porsche911 Cabriolet (991)Turbo 3.8
Power
620hp462kW
520hp388kW
Torque
700Nm516lb-ft
660Nm487lb-ft
Curb weight
1,370kg3,020lb
1,665kg3,671lb
Gross weight
1,680kg3,704lb
2,045kg4,508lb
Top speed
330 km/h
205 mph
315 km/h
196 mph
To 99% top speed
46.2s99% target: 327 km/h / 203 mph
Calculated
51.1s99% target: 312 km/h / 194 mph
Calculated
0-100 km/h
3.5s
3.5s
0-200 km/h
9.2s
Calculated
10.0s
Calculated
0-60 mph
3.4s
Calculated
3.3s
Calculated
Fuel consumption
11.9L/100 km19.8mpg US23.7mpg UK
9.9L/100 km23.8mpg US28.5mpg UK
Fuel consumption city
17.9L/100 km13.1mpg US15.8mpg UK
13.4L/100 km17.6mpg US21.1mpg UK
Fuel consumption highway
8.7L/100 km27mpg US32.5mpg UK
7.8L/100 km30.2mpg US36.2mpg UK
Quarter mile
11.0s
Calculated
11.2s
Calculated
Power-to-weight
453hp/t337kW/t205hp/1000 lb
Calculated
312hp/t233kW/t142hp/1000 lb
Calculated
Torque-to-weight
511Nm/t342lb-ft/ton
Calculated
396Nm/t265lb-ft/ton
Calculated
Estimated range
756km470mi
Calculated
687km427mi
Calculated
Displacement
3,600cc220cu in
3,800cc232cu in
Length
4,469mm176in
4,506mm177in
Width
1,852mm73in
1,880mm74in
Height
1,285mm51in
1,292mm51in
Wheelbase
2,350mm93in
2,450mm96in
Front track-
1,541mm61in
Rear track-
1,590mm63in
Trunk volume-
275L
Max trunk volume
105L
-
Doors
2
2
Seats
2
4
Fuel tank
90L
68L
CO2 emissions
284g/km
231g/km

Performance charts

Use the estimates as comparison hints and verify exact figures before making decisions.

Dyno simulation

Estimated stock-style power and torque curves by engine speed.

Porsche 911 (997) Facelift 2008 GT2 RS 3.6Porsche 911 Cabriolet (991) Turbo 3.8PowerTorque
  • Porsche 911 (997) Facelift 2008 GT2 RS 3.6: Power / Torque
  • Porsche 911 Cabriolet (991) Turbo 3.8: Power / Torque
Dyno simulation data table
VehiclePeak power RPMPeak torque RPMMax engine speed
Porsche911 (997)Facelift 2008GT2 RS 3.62,250-5,500 rpm-5,750 rpm
Porsche911 Cabriolet (991)Turbo 3.86,000-6,500 rpm1,950-5,000 rpm6,750 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
MetricPorsche911 (997)Facelift 2008GT2 RS 3.6Porsche911 Cabriolet (991)Turbo 3.8
Acceleration checkpoints
0-60 mph
0-97 km/h
3.4 s
3.3 s
0-100 km/h
0-62 mph
3.5 s
3.5 s
0-200 km/h
0-124 mph
9.2 s
10.0 s
0-200 mph
0-322 km/h
37.1 s
-
Top speed
330 km/h
205 mph
315 km/h
196 mph
Drag race simulation
60 ft
18 m
2.0 s
1.9 s
330 ft
101 m
5.0 s
5.0 s
1/8 mile
201 m
7.3 s
7.4 s
1000 ft
305 m
9.3 s
9.4 s
1/4 mile
402 m
11.0 s
11.2 s
Trap speed
1/4 mile
402 m
222 km/h
138 mph
212 km/h
132 mph

Power comparison

Bar comparison chart for Power. Higher is better · hp / kW

Chart data table
VehicleValue
Porsche911 (997)Facelift 2008GT2 RS 3.6
620 hp
462 kW
Porsche911 Cabriolet (991)Turbo 3.8
520 hp
388 kW

Porsche 911 (997) Facelift 2008 GT2 RS 3.6 has 100 hp more than Porsche 911 Cabriolet (991) Turbo 3.8.

The biggest power difference is between Porsche 911 Cabriolet (991) Turbo 3.8 and Porsche 911 (997) Facelift 2008 GT2 RS 3.6: 100 hp (75 kW).

Torque comparison

Bar comparison chart for Torque. Higher is better · Nm / lb-ft

Chart data table
VehicleValue
Porsche911 (997)Facelift 2008GT2 RS 3.6
700 Nm
516 lb-ft
Porsche911 Cabriolet (991)Turbo 3.8
660 Nm
487 lb-ft

Curb weight comparison

Bar comparison chart for Curb weight. Lower is better · kg / lb

Chart data table
VehicleValue
Porsche911 (997)Facelift 2008GT2 RS 3.6
1,370 kg
3,020 lb
Porsche911 Cabriolet (991)Turbo 3.8
1,665 kg
3,671 lb

Top speed without limiter comparison

Bar comparison chart for Top speed without limiter. Higher is better · km/h / mph

Chart data table
VehicleValue
Porsche911 (997)Facelift 2008GT2 RS 3.6
330 km/h
205 mph
Porsche911 Cabriolet (991)Turbo 3.8
315 km/h
196 mph

0-100 km/h comparison

Bar comparison chart for 0-100 km/h. Lower is better · seconds

Chart data table
VehicleValue
Porsche911 (997)Facelift 2008GT2 RS 3.63.5 s
Porsche911 Cabriolet (991)Turbo 3.83.5 s

Fuel consumption comparison

Bar comparison chart for Fuel consumption. Lower is better · L/100 km / mpg US / mpg UK

Chart data table
VehicleValue
Porsche911 (997)Facelift 2008GT2 RS 3.6
11.9 L/100 km
19.8 mpg US
23.7 mpg UK
Porsche911 Cabriolet (991)Turbo 3.8
9.9 L/100 km
23.8 mpg US
28.5 mpg UK

The biggest fuel consumption difference is between Porsche 911 Cabriolet (991) Turbo 3.8 and Porsche 911 (997) Facelift 2008 GT2 RS 3.6: 2.0 L/100 km.

Power-to-weight comparison

Bar comparison chart for Power-to-weight. Higher is better · hp/t / kW/t

Chart data table
VehicleValue
Porsche911 (997)Facelift 2008GT2 RS 3.6
453 hp/t
337 kW/t
2.2 kg/hp
Porsche911 Cabriolet (991)Turbo 3.8
312 hp/t
233 kW/t
3.2 kg/hp

Estimated range comparison

Bar comparison chart for Estimated range. Higher is better · km / mi

Chart data table
VehicleValue
Porsche911 (997)Facelift 2008GT2 RS 3.6
756 km
470 mi
Porsche911 Cabriolet (991)Turbo 3.8
687 km
427 mi

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
VehiclePowerAccelerationTop speed
Porsche911 (997)Facelift 2008GT2 RS 3.6
620 hp
462 kW
3.5 s
330 km/h
205 mph
Porsche911 Cabriolet (991)Turbo 3.8
520 hp
388 kW
3.5 s
315 km/h
196 mph

Most attractive quadrant

Scatter chart with performance score on the X axis and practicality score on the Y axis.

Chart data table
VehiclePerformance scorePracticality score
Porsche911 (997)Facelift 2008GT2 RS 3.6
Power
620 hp
462 kW
0-100 km/h3.5 s
Top speed
330 km/h
205 mph
Doors/seats
2 doors
2 seats
Trunk
105 L
3.7 cu ft
Length
4,469 mm
175.9 in
Height
1,285 mm
50.6 in
Porsche911 Cabriolet (991)Turbo 3.8
Power
520 hp
388 kW
0-100 km/h3.5 s
Top speed
315 km/h
196 mph
Doors/seats
2 doors
4 seats
Trunk
275 L
9.7 cu ft
Length
4,506 mm
177.4 in
Height
1,292 mm
50.9 in

Performance vs fuel economy

Cars closer to the top-right corner combine stronger performance with better fuel economy scores.

Performance vs fuel economy data table
VehiclePerformance scoreFuel economy score
Porsche911 (997)Facelift 2008GT2 RS 3.6
Power
620 hp
462 kW
0-100 km/h3.5 s
Top speed
330 km/h
205 mph
11.9 L/100 km
19.8 mpg US
23.7 mpg UK
Porsche911 Cabriolet (991)Turbo 3.8
Power
520 hp
388 kW
0-100 km/h3.5 s
Top speed
315 km/h
196 mph
9.9 L/100 km
23.8 mpg US
28.5 mpg UK

Porsche 911 Cabriolet (991) Turbo 3.8 is closest to the top-right balance target for performance and fuel economy.

Acceleration vs fuel consumption

Cars closer to the lower-left corner offer a better mix of quick acceleration and low fuel consumption.

Acceleration vs fuel consumption data table
VehicleFuel consumption, L/100 km0-100 km/h, s
Porsche911 (997)Facelift 2008GT2 RS 3.6
11.9 L/100 km
19.8 mpg US
23.7 mpg UK
3.5 s
Porsche911 Cabriolet (991)Turbo 3.8
9.9 L/100 km
23.8 mpg US
28.5 mpg UK
3.5 s

Power-to-weight vs fuel consumption

The shaded area favors higher power-to-weight with lower combined fuel consumption.

Power-to-weight vs fuel consumption data table
VehiclePower-to-weight, hp/tFuel consumption, L/100 km
Porsche911 (997)Facelift 2008GT2 RS 3.6
453 hp/t
337 kW/t
2.2 kg/hp
11.9 L/100 km
19.8 mpg US
23.7 mpg UK
Porsche911 Cabriolet (991)Turbo 3.8
312 hp/t
233 kW/t
3.2 kg/hp
9.9 L/100 km
23.8 mpg US
28.5 mpg UK

Detailed score breakdown

Detailed score breakdown
VehiclePorsche911 (997)Facelift 2008GT2 RS 3.6Porsche911 Cabriolet (991)Turbo 3.8
Power
620 hp
462 kW
520 hp
388 kW
Torque
700 Nm
516 lb-ft
660 Nm
487 lb-ft
Acceleration
3.5 s
3.5 s
Top speed
330 km/h
205 mph
315 km/h
196 mph
Lightness
1,370 kg
3,020 lb
1,665 kg
3,671 lb
Fuel consumption
11.9 L/100 km
19.8 mpg US
23.7 mpg UK
9.9 L/100 km
23.8 mpg US
28.5 mpg UK
Practicality
Doors/seats
2 doors
2 seats
Trunk
105 L
3.7 cu ft
Length
4,469 mm
175.9 in
Height
1,285 mm
50.6 in
Doors/seats
2 doors
4 seats
Trunk
275 L
9.7 cu ft
Length
4,506 mm
177.4 in
Height
1,292 mm
50.9 in
Range score
756 km
470 mi
687 km
427 mi
CO2 score
284 g/km
231 g/km
Trunk score
105 L
3.7 cu ft
275 L
9.7 cu ft
Power-to-weight score
453 hp/t
337 kW/t
2.2 kg/hp
312 hp/t
233 kW/t
3.2 kg/hp
Overall
Fixed score
Fixed score

Fuel cost and annual usage

Estimate running costs from combined consumption, your annual distance, and the fuel price in your local currency.

Enter the fuel price in your local currency, for example €/L, $/gal, £/L or any other local currency.

LC = Local Currency

Fuel cost and annual usage
VehiclePorsche 911 (997) Facelift 2008 GT2 RS 3.6Porsche 911 Cabriolet (991) Turbo 3.8
Consumption11.9 L/100 km19.8 mpg US23.7 mpg UK9.9 L/100 km23.8 mpg US28.5 mpg UK
Cost / 100 km20.83 LC100 km17.33 LC100 km
Cost / 100 mi33.51 LC100 mi27.88 LC100 mi
Annual fuel used1,785 L472 US gal393 UK gal1,485 L392 US gal327 UK gal
Annual fuel cost3,124 LC/year2,599 LC/year

Head-to-head comparisons

Porsche 911 (997) Facelift 2008 GT2 RS 3.6

  • Has 100 hp more
  • Has 40 Nm more
  • Is 295 kg lighter
  • Has 15 km/h (9 mph) higher top speed
  • Has 140 hp/t better power-to-weight
  • Has 69 km (43 mi) more estimated range

Pros

  • Quickest 0-100 km/h in this comparison
  • Highest top speed
  • Most powerful
  • Highest torque
  • Lightest
  • Best power-to-weight ratio
  • Best estimated range

Cons

  • Highest combined fuel consumption
  • Smallest trunk
  • Highest CO2 emissions

Porsche 911 Cabriolet (991) Turbo 3.8

  • Uses 2.0 L/100 km less fuel
  • Has 170 L more trunk volume
  • Emits 53 g/km less CO2

Pros

  • Lowest combined fuel consumption
  • Largest trunk

Cons

  • Lowest power
  • Heaviest
  • Lowest top speed

Choose cars to compare

Brand
Model
Generation
Engine or modification
Porsche 911 (997) GT2 RS 3.6
Porsche 911 Cabriolet (991) Turbo 3.8
Compare selected cars
2 vehicles selected

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Porsche 911 (997) · Facelift 2008 GT2 RS 3.6 vs Porsche 911 Cabriolet (991) Turbo 3.8 - car comparison - FastVsFaster