Car comparison

Porsche 911 (997) · Facelift 2008 GT3 RS 3.8vsPorsche 911 Cabriolet (997) Turbo 3.6

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)

Turbo 3.6

480 hp3600 ccGasolineAWDManualTurbochargedCabriolet / convertible2007-2008

Comparison overview

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

Best choices

Porsche 911 Cabriolet (997) Turbo 3.6

  • Most powerful
    480 hp
    358 kW
  • Highest torque
    620 Nm
    457 lb-ft
  • Lowest combined fuel consumption
    12.9 L/100 km
    18.2 mpg US
    21.9 mpg UK
  • Lowest city consumption
    19.2 L/100 km
    12.3 mpg US
    14.7 mpg UK
  • Lowest highway consumption
    9.5 L/100 km
    24.8 mpg US
    29.7 mpg UK
  • Best overall score
    75/100
  • Best performance score
    88/100
  • Best economy score
    72/100
  • Best practicality score
    47/100

Porsche 911 (997) Facelift 2008 GT3 RS 3.8

  • Quickest 0-100 km/h
    4.0 s
  • Fastest top speed
    320 km/h
    199 mph Unrestricted
    310 km/h
    193 mph Restricted
  • Lightest
    1,370 kg
    3,020 lb
  • Best power-to-weight
    328 hp/t
    245 kW/t
    3.0 kg/hp
  • Best estimated range
    508 km
    315 mi

Specification comparison

Specification comparison
ModelPorsche911 (997)Facelift 2008GT3 RS 3.8Porsche911 Cabriolet (997)Turbo 3.6
Power
450hp336kW
480hp358kW
Torque
430Nm317lb-ft
620Nm457lb-ft
Curb weight
1,370kg3,020lb
1,655kg3,649lb
Gross weight
1,680kg3,704lb
2,000kg4,409lb
Top speed
Unrestricted
320 km/h199 mph
Restricted
310 km/h193 mph
Calculated
Unrestricted
320 km/h199 mph
Restricted
310 km/h193 mph
Calculated
To 99% top speed
58.5s99% target: 317 km/h / 197 mph
Calculated
61.0s99% target: 317 km/h / 197 mph
Calculated
0-100 km/h
4.0s
4.0s
0-200 km/h
11.2s
Calculated
11.4s
Calculated
0-60 mph
3.8s
Calculated
3.8s
Calculated
Fuel consumption
13.2L/100 km17.8mpg US21.4mpg UK
12.9L/100 km18.2mpg US21.9mpg UK
Fuel consumption city
19.4L/100 km12.1mpg US14.6mpg UK
19.2L/100 km12.3mpg US14.7mpg UK
Fuel consumption highway
9.6L/100 km24.5mpg US29.4mpg UK
9.5L/100 km24.8mpg US29.7mpg UK
Quarter mile
11.7s
Calculated
11.8s
Calculated
Power-to-weight
328hp/t245kW/t149hp/1000 lb
Calculated
290hp/t216kW/t132hp/1000 lb
Calculated
Torque-to-weight
314Nm/t210lb-ft/ton
Calculated
375Nm/t251lb-ft/ton
Calculated
Estimated range
508km315mi
Calculated
496km308mi
Calculated
Displacement
3,797cc232cu in
3,600cc220cu in
Length
4,460mm176in
4,427mm174in
Width
1,808mm71in
1,808mm71in
Height
1,280mm50in
1,310mm52in
Wheelbase
2,355mm93in
2,350mm93in
Max trunk volume
105L
-
Doors
2
2
Seats
2
4
Fuel tank
67L
64L
CO2 emissions
314g/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) Turbo 3.6PowerTorque
  • Porsche 911 (997) Facelift 2008 GT3 RS 3.8: Power / Torque
  • Porsche 911 Cabriolet (997) Turbo 3.6: 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)Turbo 3.66,000 rpm1,950-5,000 rpm6,250 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
MetricPorsche911 (997)Facelift 2008GT3 RS 3.8Porsche911 Cabriolet (997)Turbo 3.6
Acceleration checkpoints
0-60 mph
0-97 km/h
3.8 s
3.8 s
0-100 km/h
0-62 mph
4.0 s
4.0 s
0-200 km/h
0-124 mph
11.2 s
11.4 s
Top speed
Unrestricted
320 km/h199 mph
Restricted
310 km/h193 mph
Likely limited
Unrestricted
320 km/h199 mph
Restricted
310 km/h193 mph
Likely limited
Drag race simulation
60 ft
18 m
2.1 s
2.1 s
330 ft
101 m
5.3 s
5.3 s
1/8 mile
201 m
7.8 s
7.8 s
1000 ft
305 m
10.0 s
10.0 s
1/4 mile
402 m
11.7 s
11.8 s
Trap speed
1/4 mile
402 m
205 km/h
128 mph
204 km/h
127 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)Turbo 3.6
480 hp
358 kW

Porsche 911 Cabriolet (997) Turbo 3.6 has 30 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) Turbo 3.6: 30 hp (22 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)Turbo 3.6
620 Nm
457 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)Turbo 3.6
1,655 kg
3,649 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)Turbo 3.6
Unrestricted
320 km/h199 mph
Restricted
310 km/h193 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)Turbo 3.64.0 s

Although Porsche 911 Cabriolet (997) Turbo 3.6 has more power, Porsche 911 (997) Facelift 2008 GT3 RS 3.8 is quicker from 0-100 km/h.

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)Turbo 3.6
12.9 L/100 km
18.2 mpg US
21.9 mpg UK

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)Turbo 3.6
290 hp/t
216 kW/t
3.4 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)Turbo 3.6
496 km
308 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)Turbo 3.6
480 hp
358 kW
4.0 s
Unrestricted
320 km/h199 mph
Restricted
310 km/h193 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)Turbo 3.6
Power
480 hp
358 kW
0-100 km/h4.0 s
Top speed
Unrestricted
320 km/h199 mph
Restricted
310 km/h193 mph
Doors/seats
2 doors
4 seats
Trunk-
Length
4,427 mm
174.3 in
Height
1,310 mm
51.6 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)Turbo 3.6
Power
480 hp
358 kW
0-100 km/h4.0 s
Top speed
Unrestricted
320 km/h199 mph
Restricted
310 km/h193 mph
12.9 L/100 km
18.2 mpg US
21.9 mpg UK

Porsche 911 Cabriolet (997) Turbo 3.6 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)Turbo 3.6
12.9 L/100 km
18.2 mpg US
21.9 mpg UK
4.0 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)Turbo 3.6
290 hp/t
216 kW/t
3.4 kg/hp
12.9 L/100 km
18.2 mpg US
21.9 mpg UK

Detailed score breakdown

Detailed score breakdown
VehiclePorsche911 (997)Facelift 2008GT3 RS 3.8Porsche911 Cabriolet (997)Turbo 3.6
Power
450 hp
336 kW
480 hp
358 kW
Torque
430 Nm
317 lb-ft
620 Nm
457 lb-ft
Acceleration
4.0 s
4.0 s
Top speed
Unrestricted
320 km/h199 mph
Restricted
310 km/h193 mph
Unrestricted
320 km/h199 mph
Restricted
310 km/h193 mph
Lightness
1,370 kg
3,020 lb
1,655 kg
3,649 lb
Fuel consumption
13.2 L/100 km
17.8 mpg US
21.4 mpg UK
12.9 L/100 km
18.2 mpg US
21.9 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-
Length
4,427 mm
174.3 in
Height
1,310 mm
51.6 in
Range score
508 km
315 mi
496 km
308 mi
CO2 score
314 g/km
-
Trunk score
105 L
3.7 cu ft
-
Power-to-weight score
328 hp/t
245 kW/t
3.0 kg/hp
290 hp/t
216 kW/t
3.4 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) Turbo 3.6
Consumption13.2 L/100 km17.8 mpg US21.4 mpg UK12.9 L/100 km18.2 mpg US21.9 mpg UK
Cost / 100 km23.10 LC100 km22.58 LC100 km
Cost / 100 mi37.18 LC100 mi36.33 LC100 mi
Annual fuel used1,980 L523 US gal436 UK gal1,935 L511 US gal426 UK gal
Annual fuel cost3,465 LC/year3,386 LC/year

Head-to-head comparisons

Porsche 911 (997) Facelift 2008 GT3 RS 3.8

  • Is 285 kg lighter
  • Has 38 hp/t better power-to-weight
  • Has 11 km (7 mi) more estimated range

Pros

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

Cons

  • Lowest power
  • Highest combined fuel consumption

Choose cars to compare

Brand
Model
Generation
Engine or modification
Porsche 911 (997) GT3 RS 3.8
Porsche 911 Cabriolet (997) Turbo 3.6
Compare selected cars
2 vehicles selected

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