Car comparison

Porsche 911 (997) · Facelift 2008 GT3 RS 3.8vsPorsche 911 Cabriolet (997) · Facelift 2008 Turbo 3.8

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

New comparison

Porsche 911 (997) · Facelift 2008

GT3 RS 3.8

450 hp3797 ccGasolineRWDManualNaturally aspiratedCoupe2009-2011
VS

Porsche 911 Cabriolet (997) · Facelift 2008

Turbo 3.8

500 hp3800 ccGasolineAWDManualTurbochargedCabriolet / convertible2009-2011

Comparison overview

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

Best choices

Porsche 911 Cabriolet (997) Facelift 2008 Turbo 3.8

  • Quickest 0-100 km/h
    3.8 s
  • Most powerful
    500 hp
    373 kW
  • Highest torque
    650 Nm
    479 lb-ft
  • Lowest combined fuel consumption
    11.7 L/100 km
    20.1 mpg US
    24.1 mpg UK
  • Lowest city consumption
    16.7 L/100 km
    14.1 mpg US
    16.9 mpg UK
  • Lowest highway consumption
    8.4 L/100 km
    28.0 mpg US
    33.6 mpg UK
  • Lowest CO2 emissions
    275 g/km
  • Best estimated range
    573 km
    356 mi
  • Best overall score
    76/100
  • Best performance score
    89/100
  • Best economy score
    75/100
  • Best practicality score
    47/100

Specification comparison

Specification comparison
ModelPorsche911 (997)Facelift 2008GT3 RS 3.8Porsche911 Cabriolet (997)Facelift 2008Turbo 3.8
Power
450hp336kW
500hp373kW
Torque
430Nm317lb-ft
650Nm479lb-ft
Curb weight
1,370kg3,020lb
1,645kg3,627lb
Gross weight
1,680kg3,704lb
1,995kg4,398lb
Top speed
Unrestricted
320 km/h199 mph
Restricted
310 km/h193 mph
Calculated
312 km/h
194 mph
To 99% top speed
58.5s99% target: 317 km/h / 197 mph
Calculated
55.9s99% target: 309 km/h / 192 mph
Calculated
0-100 km/h
4.0s
3.8s
0-200 km/h
11.2s
Calculated
11.0s
Calculated
0-60 mph
3.8s
Calculated
3.6s
Calculated
Fuel consumption
13.2L/100 km17.8mpg US21.4mpg UK
11.7L/100 km20.1mpg US24.1mpg UK
Fuel consumption city
19.4L/100 km12.1mpg US14.6mpg UK
16.7L/100 km14.1mpg US16.9mpg UK
Fuel consumption highway
9.6L/100 km24.5mpg US29.4mpg UK
8.4L/100 km28mpg US33.6mpg UK
Quarter mile
11.7s
Calculated
11.6s
Calculated
Power-to-weight
328hp/t245kW/t149hp/1000 lb
Calculated
304hp/t227kW/t138hp/1000 lb
Calculated
Torque-to-weight
314Nm/t210lb-ft/ton
Calculated
395Nm/t264lb-ft/ton
Calculated
Estimated range
508km315mi
Calculated
573km356mi
Calculated
Displacement
3,797cc232cu in
3,800cc232cu in
Length
4,460mm176in
4,450mm175in
Width
1,808mm71in
1,852mm73in
Height
1,280mm50in
1,300mm51in
Wheelbase
2,355mm93in
2,350mm93in
Max trunk volume
105L
105L
Doors
2
2
Seats
2
4
Fuel tank
67L
67L
CO2 emissions
314g/km
275g/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 GT3 RS 3.8Porsche 911 Cabriolet (997) Facelift 2008 Turbo 3.8PowerTorque
  • Porsche 911 (997) Facelift 2008 GT3 RS 3.8: Power / Torque
  • Porsche 911 Cabriolet (997) Facelift 2008 Turbo 3.8: Power / Torque
Dyno simulation data table
VehiclePeak power RPMPeak torque RPMMax engine speed
Porsche911 (997)Facelift 2008GT3 RS 3.87,900 rpm6,750 rpm8,150 rpm
Porsche911 Cabriolet (997)Facelift 2008Turbo 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 2008GT3 RS 3.8Porsche911 Cabriolet (997)Facelift 2008Turbo 3.8
Acceleration checkpoints
0-60 mph
0-97 km/h
3.8 s
3.6 s
0-100 km/h
0-62 mph
4.0 s
3.8 s
0-200 km/h
0-124 mph
11.2 s
11.0 s
Top speed
Unrestricted
320 km/h199 mph
Restricted
310 km/h193 mph
Likely limited
312 km/h
194 mph
Drag race simulation
60 ft
18 m
2.1 s
2.0 s
330 ft
101 m
5.3 s
5.2 s
1/8 mile
201 m
7.8 s
7.6 s
1000 ft
305 m
10.0 s
9.8 s
1/4 mile
402 m
11.7 s
11.6 s
Trap speed
1/4 mile
402 m
205 km/h
128 mph
206 km/h
128 mph

Power comparison

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

Chart data table
VehicleValue
Porsche911 (997)Facelift 2008GT3 RS 3.8
450 hp
336 kW
Porsche911 Cabriolet (997)Facelift 2008Turbo 3.8
500 hp
373 kW

Porsche 911 Cabriolet (997) Facelift 2008 Turbo 3.8 has 50 hp more than Porsche 911 (997) Facelift 2008 GT3 RS 3.8.

The biggest power difference is between Porsche 911 (997) Facelift 2008 GT3 RS 3.8 and Porsche 911 Cabriolet (997) Facelift 2008 Turbo 3.8: 50 hp (37 kW).

Torque comparison

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

Chart data table
VehicleValue
Porsche911 (997)Facelift 2008GT3 RS 3.8
430 Nm
317 lb-ft
Porsche911 Cabriolet (997)Facelift 2008Turbo 3.8
650 Nm
479 lb-ft

Curb weight comparison

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

Chart data table
VehicleValue
Porsche911 (997)Facelift 2008GT3 RS 3.8
1,370 kg
3,020 lb
Porsche911 Cabriolet (997)Facelift 2008Turbo 3.8
1,645 kg
3,627 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 2008GT3 RS 3.8
Unrestricted
320 km/h199 mph
Restricted
310 km/h193 mph
Porsche911 Cabriolet (997)Facelift 2008Turbo 3.8
312 km/h
194 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 2008GT3 RS 3.84.0 s
Porsche911 Cabriolet (997)Facelift 2008Turbo 3.83.8 s

The biggest 0-100 km/h difference is between Porsche 911 Cabriolet (997) Facelift 2008 Turbo 3.8 and Porsche 911 (997) Facelift 2008 GT3 RS 3.8: 0.2 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 2008GT3 RS 3.8
13.2 L/100 km
17.8 mpg US
21.4 mpg UK
Porsche911 Cabriolet (997)Facelift 2008Turbo 3.8
11.7 L/100 km
20.1 mpg US
24.1 mpg UK

The biggest fuel consumption difference is between Porsche 911 Cabriolet (997) Facelift 2008 Turbo 3.8 and Porsche 911 (997) Facelift 2008 GT3 RS 3.8: 1.5 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 2008GT3 RS 3.8
328 hp/t
245 kW/t
3.0 kg/hp
Porsche911 Cabriolet (997)Facelift 2008Turbo 3.8
304 hp/t
227 kW/t
3.3 kg/hp

Estimated range comparison

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

Chart data table
VehicleValue
Porsche911 (997)Facelift 2008GT3 RS 3.8
508 km
315 mi
Porsche911 Cabriolet (997)Facelift 2008Turbo 3.8
573 km
356 mi

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
VehiclePowerAccelerationTop speed
Porsche911 (997)Facelift 2008GT3 RS 3.8
450 hp
336 kW
4.0 s
Unrestricted
320 km/h199 mph
Restricted
310 km/h193 mph
Porsche911 Cabriolet (997)Facelift 2008Turbo 3.8
500 hp
373 kW
3.8 s
312 km/h
194 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 2008GT3 RS 3.8
Power
450 hp
336 kW
0-100 km/h4.0 s
Top speed
Unrestricted
320 km/h199 mph
Restricted
310 km/h193 mph
Doors/seats
2 doors
2 seats
Trunk
105 L
3.7 cu ft
Length
4,460 mm
175.6 in
Height
1,280 mm
50.4 in
Porsche911 Cabriolet (997)Facelift 2008Turbo 3.8
Power
500 hp
373 kW
0-100 km/h3.8 s
Top speed
312 km/h
194 mph
Doors/seats
2 doors
4 seats
Trunk
105 L
3.7 cu ft
Length
4,450 mm
175.2 in
Height
1,300 mm
51.2 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 2008GT3 RS 3.8
Power
450 hp
336 kW
0-100 km/h4.0 s
Top speed
Unrestricted
320 km/h199 mph
Restricted
310 km/h193 mph
13.2 L/100 km
17.8 mpg US
21.4 mpg UK
Porsche911 Cabriolet (997)Facelift 2008Turbo 3.8
Power
500 hp
373 kW
0-100 km/h3.8 s
Top speed
312 km/h
194 mph
11.7 L/100 km
20.1 mpg US
24.1 mpg UK

Porsche 911 Cabriolet (997) Facelift 2008 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 2008GT3 RS 3.8
13.2 L/100 km
17.8 mpg US
21.4 mpg UK
4.0 s
Porsche911 Cabriolet (997)Facelift 2008Turbo 3.8
11.7 L/100 km
20.1 mpg US
24.1 mpg UK
3.8 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 2008GT3 RS 3.8
328 hp/t
245 kW/t
3.0 kg/hp
13.2 L/100 km
17.8 mpg US
21.4 mpg UK
Porsche911 Cabriolet (997)Facelift 2008Turbo 3.8
304 hp/t
227 kW/t
3.3 kg/hp
11.7 L/100 km
20.1 mpg US
24.1 mpg UK

Detailed score breakdown

Detailed score breakdown
VehiclePorsche911 (997)Facelift 2008GT3 RS 3.8Porsche911 Cabriolet (997)Facelift 2008Turbo 3.8
Power
450 hp
336 kW
500 hp
373 kW
Torque
430 Nm
317 lb-ft
650 Nm
479 lb-ft
Acceleration
4.0 s
3.8 s
Top speed
Unrestricted
320 km/h199 mph
Restricted
310 km/h193 mph
312 km/h
194 mph
Lightness
1,370 kg
3,020 lb
1,645 kg
3,627 lb
Fuel consumption
13.2 L/100 km
17.8 mpg US
21.4 mpg UK
11.7 L/100 km
20.1 mpg US
24.1 mpg UK
Practicality
Doors/seats
2 doors
2 seats
Trunk
105 L
3.7 cu ft
Length
4,460 mm
175.6 in
Height
1,280 mm
50.4 in
Doors/seats
2 doors
4 seats
Trunk
105 L
3.7 cu ft
Length
4,450 mm
175.2 in
Height
1,300 mm
51.2 in
Range score
508 km
315 mi
573 km
356 mi
CO2 score
314 g/km
275 g/km
Trunk score
105 L
3.7 cu ft
105 L
3.7 cu ft
Power-to-weight score
328 hp/t
245 kW/t
3.0 kg/hp
304 hp/t
227 kW/t
3.3 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 GT3 RS 3.8Porsche 911 Cabriolet (997) Facelift 2008 Turbo 3.8
Consumption13.2 L/100 km17.8 mpg US21.4 mpg UK11.7 L/100 km20.1 mpg US24.1 mpg UK
Cost / 100 km23.10 LC100 km20.47 LC100 km
Cost / 100 mi37.18 LC100 mi32.95 LC100 mi
Annual fuel used1,980 L523 US gal436 UK gal1,755 L464 US gal386 UK gal
Annual fuel cost3,465 LC/year3,071 LC/year

Head-to-head comparisons

Porsche 911 (997) Facelift 2008 GT3 RS 3.8

  • Is 275 kg lighter
  • Has 8 km/h (5 mph) higher top speed
  • Has 25 hp/t better power-to-weight

Pros

  • Highest top speed
  • Lightest
  • Best power-to-weight ratio
  • Largest trunk

Cons

  • Slowest 0-100 km/h
  • Lowest power
  • Highest combined fuel consumption
  • Highest CO2 emissions

Porsche 911 Cabriolet (997) Facelift 2008 Turbo 3.8

  • Has 50 hp more
  • Has 220 Nm more
  • Is 0.2 s quicker from 0-100 km/h
  • Uses 1.5 L/100 km less fuel
  • Has 65 km (40 mi) more estimated range
  • Emits 39 g/km less CO2

Pros

  • Quickest 0-100 km/h in this comparison
  • Most powerful
  • Highest torque
  • Lowest combined fuel consumption
  • Best estimated range

Cons

  • Heaviest
  • Lowest top speed

Choose cars to compare

Brand
Model
Generation
Engine or modification
Porsche 911 (997) GT3 RS 3.8
Porsche 911 Cabriolet (997) Turbo 3.8
Compare selected cars
2 vehicles selected

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Porsche 911 (997) · Facelift 2008 GT3 RS 3.8 vs Porsche 911 Cabriolet (997) · Facelift 2008 Turbo 3.8 - car comparison - FastVsFaster