Car comparison

Porsche 911 (991) GT3 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 (991)

GT3 3.8

475 hp3799 ccGasolineRWDDual-clutchNaturally aspiratedCoupe2013-2017
VS

Porsche 911 Cabriolet (997) · Facelift 2008

Turbo 3.8

500 hp3800 ccGasolineAWDDual-clutchTurbochargedCabriolet / 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

  • Most powerful
    500 hp
    373 kW
  • Highest torque
    650 Nm
    479 lb-ft
  • Lowest combined fuel consumption
    11.5 L/100 km
    20.5 mpg US
    24.6 mpg UK
  • Lowest city consumption
    16.7 L/100 km
    14.1 mpg US
    16.9 mpg UK
  • Lowest highway consumption
    8.2 L/100 km
    28.7 mpg US
    34.4 mpg UK
  • Lowest CO2 emissions
    270 g/km
  • Best estimated range
    583 km
    362 mi
  • Best overall score
    76/100
  • Best performance score
    90/100
  • Best economy score
    76/100
  • Best practicality score
    47/100

Porsche 911 (991) GT3 3.8

  • Quickest 0-100 km/h
    3.5 s
  • Fastest top speed
    315 km/h
    196 mph
  • Lightest
    1,430 kg
    3,153 lb
  • Best power-to-weight
    332 hp/t
    248 kW/t
    3.0 kg/hp
  • Largest trunk
    385 L

Specification comparison

Specification comparison
ModelPorsche911 (991)GT3 3.8Porsche911 Cabriolet (997)Facelift 2008Turbo 3.8
Power
475hp354kW
500hp373kW
Torque
440Nm325lb-ft
650Nm479lb-ft
Curb weight
1,430kg3,153lb
1,670kg3,682lb
Gross weight
1,720kg3,792lb
2,020kg4,453lb
Top speed
315 km/h
196 mph
312 km/h
194 mph
To 99% top speed
50.5s99% target: 312 km/h / 194 mph
Calculated
54.9s99% target: 309 km/h / 192 mph
Calculated
0-100 km/h
3.5s
3.7s
0-200 km/h
9.9s
Calculated
10.7s
Calculated
0-60 mph
3.3s
Calculated
3.5s
Calculated
Fuel consumption
12.4L/100 km19mpg US22.8mpg UK
11.5L/100 km20.5mpg US24.6mpg UK
Fuel consumption city
18.9L/100 km12.4mpg US14.9mpg UK
16.7L/100 km14.1mpg US16.9mpg UK
Fuel consumption highway
8.9L/100 km26.4mpg US31.7mpg UK
8.2L/100 km28.7mpg US34.4mpg UK
Quarter mile
11.2s
Calculated
11.4s
Calculated
Power-to-weight
332hp/t248kW/t151hp/1000 lb
Calculated
299hp/t223kW/t136hp/1000 lb
Calculated
Torque-to-weight
308Nm/t206lb-ft/ton
Calculated
389Nm/t260lb-ft/ton
Calculated
Estimated range
516km321mi
Calculated
583km362mi
Calculated
Displacement
3,799cc232cu in
3,800cc232cu in
Length
4,545mm179in
4,450mm175in
Width
1,852mm73in
1,852mm73in
Height
1,269mm50in
1,300mm51in
Wheelbase
2,457mm97in
2,350mm93in
Front track
1,551mm61in
-
Rear track
1,555mm61in
-
Trunk volume
385L
-
Max trunk volume-
105L
Doors
2
2
Seats
2
4
Fuel tank
64L
67L
CO2 emissions
289g/km
270g/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 (991) GT3 3.8Porsche 911 Cabriolet (997) Facelift 2008 Turbo 3.8PowerTorque
  • Porsche 911 (991) GT3 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 (991)GT3 3.88,250 rpm6,250 rpm8,500 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 (991)GT3 3.8Porsche911 Cabriolet (997)Facelift 2008Turbo 3.8
Acceleration checkpoints
0-60 mph
0-97 km/h
3.3 s
3.5 s
0-100 km/h
0-62 mph
3.5 s
3.7 s
0-200 km/h
0-124 mph
9.9 s
10.7 s
Top speed
315 km/h
196 mph
312 km/h
194 mph
Drag race simulation
60 ft
18 m
2.0 s
2.0 s
330 ft
101 m
5.0 s
5.1 s
1/8 mile
201 m
7.4 s
7.6 s
1000 ft
305 m
9.4 s
9.7 s
1/4 mile
402 m
11.2 s
11.4 s
Trap speed
1/4 mile
402 m
213 km/h
132 mph
207 km/h
129 mph

Power comparison

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

Chart data table
VehicleValue
Porsche911 (991)GT3 3.8
475 hp
354 kW
Porsche911 Cabriolet (997)Facelift 2008Turbo 3.8
500 hp
373 kW

Porsche 911 Cabriolet (997) Facelift 2008 Turbo 3.8 has 25 hp more than Porsche 911 (991) GT3 3.8.

The biggest power difference is between Porsche 911 (991) GT3 3.8 and Porsche 911 Cabriolet (997) Facelift 2008 Turbo 3.8: 25 hp (19 kW).

Torque comparison

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

Chart data table
VehicleValue
Porsche911 (991)GT3 3.8
440 Nm
325 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 (991)GT3 3.8
1,430 kg
3,153 lb
Porsche911 Cabriolet (997)Facelift 2008Turbo 3.8
1,670 kg
3,682 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 (991)GT3 3.8
315 km/h
196 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 (991)GT3 3.83.5 s
Porsche911 Cabriolet (997)Facelift 2008Turbo 3.83.7 s

Although Porsche 911 Cabriolet (997) Facelift 2008 Turbo 3.8 has more power, Porsche 911 (991) GT3 3.8 is quicker from 0-100 km/h.

The biggest 0-100 km/h difference is between Porsche 911 (991) GT3 3.8 and Porsche 911 Cabriolet (997) Facelift 2008 Turbo 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 (991)GT3 3.8
12.4 L/100 km
19.0 mpg US
22.8 mpg UK
Porsche911 Cabriolet (997)Facelift 2008Turbo 3.8
11.5 L/100 km
20.5 mpg US
24.6 mpg UK

The biggest fuel consumption difference is between Porsche 911 Cabriolet (997) Facelift 2008 Turbo 3.8 and Porsche 911 (991) GT3 3.8: 0.9 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 (991)GT3 3.8
332 hp/t
248 kW/t
3.0 kg/hp
Porsche911 Cabriolet (997)Facelift 2008Turbo 3.8
299 hp/t
223 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 (991)GT3 3.8
516 km
321 mi
Porsche911 Cabriolet (997)Facelift 2008Turbo 3.8
583 km
362 mi

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
VehiclePowerAccelerationTop speed
Porsche911 (991)GT3 3.8
475 hp
354 kW
3.5 s
315 km/h
196 mph
Porsche911 Cabriolet (997)Facelift 2008Turbo 3.8
500 hp
373 kW
3.7 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 (991)GT3 3.8
Power
475 hp
354 kW
0-100 km/h3.5 s
Top speed
315 km/h
196 mph
Doors/seats
2 doors
2 seats
Trunk
385 L
13.6 cu ft
Length
4,545 mm
178.9 in
Height
1,269 mm
50.0 in
Porsche911 Cabriolet (997)Facelift 2008Turbo 3.8
Power
500 hp
373 kW
0-100 km/h3.7 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 (991)GT3 3.8
Power
475 hp
354 kW
0-100 km/h3.5 s
Top speed
315 km/h
196 mph
12.4 L/100 km
19.0 mpg US
22.8 mpg UK
Porsche911 Cabriolet (997)Facelift 2008Turbo 3.8
Power
500 hp
373 kW
0-100 km/h3.7 s
Top speed
312 km/h
194 mph
11.5 L/100 km
20.5 mpg US
24.6 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 (991)GT3 3.8
12.4 L/100 km
19.0 mpg US
22.8 mpg UK
3.5 s
Porsche911 Cabriolet (997)Facelift 2008Turbo 3.8
11.5 L/100 km
20.5 mpg US
24.6 mpg UK
3.7 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 (991)GT3 3.8
332 hp/t
248 kW/t
3.0 kg/hp
12.4 L/100 km
19.0 mpg US
22.8 mpg UK
Porsche911 Cabriolet (997)Facelift 2008Turbo 3.8
299 hp/t
223 kW/t
3.3 kg/hp
11.5 L/100 km
20.5 mpg US
24.6 mpg UK

Detailed score breakdown

Detailed score breakdown
VehiclePorsche911 (991)GT3 3.8Porsche911 Cabriolet (997)Facelift 2008Turbo 3.8
Power
475 hp
354 kW
500 hp
373 kW
Torque
440 Nm
325 lb-ft
650 Nm
479 lb-ft
Acceleration
3.5 s
3.7 s
Top speed
315 km/h
196 mph
312 km/h
194 mph
Lightness
1,430 kg
3,153 lb
1,670 kg
3,682 lb
Fuel consumption
12.4 L/100 km
19.0 mpg US
22.8 mpg UK
11.5 L/100 km
20.5 mpg US
24.6 mpg UK
Practicality
Doors/seats
2 doors
2 seats
Trunk
385 L
13.6 cu ft
Length
4,545 mm
178.9 in
Height
1,269 mm
50.0 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
516 km
321 mi
583 km
362 mi
CO2 score
289 g/km
270 g/km
Trunk score
385 L
13.6 cu ft
105 L
3.7 cu ft
Power-to-weight score
332 hp/t
248 kW/t
3.0 kg/hp
299 hp/t
223 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 (991) GT3 3.8Porsche 911 Cabriolet (997) Facelift 2008 Turbo 3.8
Consumption12.4 L/100 km19 mpg US22.8 mpg UK11.5 L/100 km20.5 mpg US24.6 mpg UK
Cost / 100 km21.70 LC100 km20.13 LC100 km
Cost / 100 mi34.92 LC100 mi32.39 LC100 mi
Annual fuel used1,860 L491 US gal409 UK gal1,725 L456 US gal379 UK gal
Annual fuel cost3,255 LC/year3,019 LC/year

Head-to-head comparisons

Porsche 911 (991) GT3 3.8

  • Is 240 kg lighter
  • Is 0.2 s quicker from 0-100 km/h
  • Has 3 km/h (2 mph) higher top speed
  • Has 33 hp/t better power-to-weight
  • Has 280 L more trunk volume

Pros

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

Cons

  • Lowest power
  • Highest combined fuel consumption
  • Highest CO2 emissions

Porsche 911 Cabriolet (997) Facelift 2008 Turbo 3.8

  • Has 25 hp more
  • Has 210 Nm more
  • Uses 0.9 L/100 km less fuel
  • Has 66 km (41 mi) more estimated range
  • Emits 19 g/km less CO2

Pros

  • Most powerful
  • Highest torque
  • Lowest combined fuel consumption
  • Best estimated range

Cons

  • Slowest 0-100 km/h
  • Heaviest
  • Lowest top speed
  • Smallest trunk

Choose cars to compare

Brand
Model
Generation
Engine or modification
Porsche 911 (991) GT3 3.8
Porsche 911 Cabriolet (997) Turbo 3.8
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