Car comparison

Porsche 911 (991 II) GT3 4.0vsPorsche 911 Cabriolet (997) · Facelift 2008 Turbo S 3.8

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

New comparison

Porsche 911 (991 II)

GT3 4.0

500 hp3996 ccGasolineRWDDual-clutchNaturally aspiratedCoupe2017-2018
VS

Porsche 911 Cabriolet (997) · Facelift 2008

Turbo S 3.8

530 hp3800 ccGasolineAWDDual-clutchTwin-turboCabriolet / convertible2010-2011

Comparison overview

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

Best choices

Porsche 911 Cabriolet (997) Facelift 2008 Turbo S 3.8

  • Most powerful
    530 hp
    395 kW
  • Highest torque
    700 Nm
    516 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
  • Best estimated range
    583 km
    362 mi
  • Best overall score
    78/100
  • Best performance score
    92/100
  • Best economy score
    76/100
  • Best practicality score
    47/100

Porsche 911 (991 II) GT3 4.0

  • Quickest 0-100 km/h
    3.4 s
  • Fastest top speed
    318 km/h
    198 mph
  • Lightest
    1,430 kg
    3,153 lb
  • Best power-to-weight
    350 hp/t
    261 kW/t
    2.9 kg/hp
  • Largest trunk
    125 L

Specification comparison

Specification comparison
ModelPorsche911 (991 II)GT3 4.0Porsche911 Cabriolet (997)Facelift 2008Turbo S 3.8
Power
500hp373kW
530hp395kW
Torque
460Nm339lb-ft
700Nm516lb-ft
Curb weight
1,430kg3,153lb
1,660kg3,660lb
Gross weight
1,777kg3,918lb
2,010kg4,431lb
Top speed
318 km/h
198 mph
315 km/h
196 mph
To 99% top speed
71.2s99% target: 315 km/h / 196 mph
Calculated
74.1s99% target: 312 km/h / 194 mph
Calculated
0-100 km/h
3.4s
3.4s
0-200 km/h
11.0s
11.3s
0-60 mph
3.2s
Calculated
3.2s
Calculated
Fuel consumption
12.7L/100 km18.5mpg US22.2mpg UK
11.5L/100 km20.5mpg US24.6mpg UK
Fuel consumption city
19.4L/100 km12.1mpg US14.6mpg UK
16.7L/100 km14.1mpg US16.9mpg UK
Fuel consumption highway
8.8L/100 km26.7mpg US32.1mpg UK
8.2L/100 km28.7mpg US34.4mpg UK
Quarter mile
11.3s
Calculated
11.3s
Calculated
Power-to-weight
350hp/t261kW/t159hp/1000 lb
Calculated
319hp/t238kW/t145hp/1000 lb
Calculated
Torque-to-weight
322Nm/t215lb-ft/ton
Calculated
422Nm/t282lb-ft/ton
Calculated
Estimated range
504km313mi
Calculated
583km362mi
Calculated
Displacement
3,996cc244cu in
3,800cc232cu in
Length
4,562mm180in
4,450mm175in
Width
1,852mm73in
1,852mm73in
Height
1,271mm50in
1,300mm51in
Wheelbase
2,457mm97in
2,350mm93in
Front track
1,551mm61in
-
Rear track
1,555mm61in
-
Ground clearance
88mm3in
-
Trunk volume
125L
-
Max trunk volume-
105L
Doors
2
2
Seats
2
4
Fuel tank
64L
67L
CO2 emissions
288g/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 II) GT3 4.0Porsche 911 Cabriolet (997) Facelift 2008 Turbo S 3.8PowerTorque
  • Porsche 911 (991 II) GT3 4.0: Power / Torque
  • Porsche 911 Cabriolet (997) Facelift 2008 Turbo S 3.8: Power / Torque
Dyno simulation data table
VehiclePeak power RPMPeak torque RPMMax engine speed
Porsche911 (991 II)GT3 4.08,250 rpm6,000 rpm9,000 rpm
Porsche911 Cabriolet (997)Facelift 2008Turbo S 3.86,250-6,750 rpm2,100-4,250 rpm7,000 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
MetricPorsche911 (991 II)GT3 4.0Porsche911 Cabriolet (997)Facelift 2008Turbo S 3.8
Acceleration checkpoints
0-60 mph
0-97 km/h
3.2 s
3.2 s
0-100 km/h
0-62 mph
3.4 s
3.4 s
0-200 km/h
0-124 mph
11.0 s
11.3 s
Top speed
318 km/h
198 mph
315 km/h
196 mph
Drag race simulation
60 ft
18 m
1.8 s
1.8 s
330 ft
101 m
4.9 s
4.8 s
1/8 mile
201 m
7.3 s
7.4 s
1000 ft
305 m
9.5 s
9.5 s
1/4 mile
402 m
11.3 s
11.3 s
Trap speed
1/4 mile
402 m
203 km/h
126 mph
200 km/h
124 mph

Power comparison

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

Chart data table
VehicleValue
Porsche911 (991 II)GT3 4.0
500 hp
373 kW
Porsche911 Cabriolet (997)Facelift 2008Turbo S 3.8
530 hp
395 kW

Porsche 911 Cabriolet (997) Facelift 2008 Turbo S 3.8 has 30 hp more than Porsche 911 (991 II) GT3 4.0.

The biggest power difference is between Porsche 911 (991 II) GT3 4.0 and Porsche 911 Cabriolet (997) Facelift 2008 Turbo S 3.8: 30 hp (22 kW).

Torque comparison

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

Chart data table
VehicleValue
Porsche911 (991 II)GT3 4.0
460 Nm
339 lb-ft
Porsche911 Cabriolet (997)Facelift 2008Turbo S 3.8
700 Nm
516 lb-ft

Curb weight comparison

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

Chart data table
VehicleValue
Porsche911 (991 II)GT3 4.0
1,430 kg
3,153 lb
Porsche911 Cabriolet (997)Facelift 2008Turbo S 3.8
1,660 kg
3,660 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 II)GT3 4.0
318 km/h
198 mph
Porsche911 Cabriolet (997)Facelift 2008Turbo S 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 (991 II)GT3 4.03.4 s
Porsche911 Cabriolet (997)Facelift 2008Turbo S 3.83.4 s

Although Porsche 911 Cabriolet (997) Facelift 2008 Turbo S 3.8 has more power, Porsche 911 (991 II) GT3 4.0 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 (991 II)GT3 4.0
12.7 L/100 km
18.5 mpg US
22.2 mpg UK
Porsche911 Cabriolet (997)Facelift 2008Turbo S 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 S 3.8 and Porsche 911 (991 II) GT3 4.0: 1.2 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 II)GT3 4.0
350 hp/t
261 kW/t
2.9 kg/hp
Porsche911 Cabriolet (997)Facelift 2008Turbo S 3.8
319 hp/t
238 kW/t
3.1 kg/hp

Estimated range comparison

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

Chart data table
VehicleValue
Porsche911 (991 II)GT3 4.0
504 km
313 mi
Porsche911 Cabriolet (997)Facelift 2008Turbo S 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 II)GT3 4.0
500 hp
373 kW
3.4 s
318 km/h
198 mph
Porsche911 Cabriolet (997)Facelift 2008Turbo S 3.8
530 hp
395 kW
3.4 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 (991 II)GT3 4.0
Power
500 hp
373 kW
0-100 km/h3.4 s
Top speed
318 km/h
198 mph
Doors/seats
2 doors
2 seats
Trunk
125 L
4.4 cu ft
Length
4,562 mm
179.6 in
Height
1,271 mm
50.0 in
Porsche911 Cabriolet (997)Facelift 2008Turbo S 3.8
Power
530 hp
395 kW
0-100 km/h3.4 s
Top speed
315 km/h
196 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 II)GT3 4.0
Power
500 hp
373 kW
0-100 km/h3.4 s
Top speed
318 km/h
198 mph
12.7 L/100 km
18.5 mpg US
22.2 mpg UK
Porsche911 Cabriolet (997)Facelift 2008Turbo S 3.8
Power
530 hp
395 kW
0-100 km/h3.4 s
Top speed
315 km/h
196 mph
11.5 L/100 km
20.5 mpg US
24.6 mpg UK

Porsche 911 Cabriolet (997) Facelift 2008 Turbo S 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 II)GT3 4.0
12.7 L/100 km
18.5 mpg US
22.2 mpg UK
3.4 s
Porsche911 Cabriolet (997)Facelift 2008Turbo S 3.8
11.5 L/100 km
20.5 mpg US
24.6 mpg UK
3.4 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 II)GT3 4.0
350 hp/t
261 kW/t
2.9 kg/hp
12.7 L/100 km
18.5 mpg US
22.2 mpg UK
Porsche911 Cabriolet (997)Facelift 2008Turbo S 3.8
319 hp/t
238 kW/t
3.1 kg/hp
11.5 L/100 km
20.5 mpg US
24.6 mpg UK

Detailed score breakdown

Detailed score breakdown
VehiclePorsche911 (991 II)GT3 4.0Porsche911 Cabriolet (997)Facelift 2008Turbo S 3.8
Power
500 hp
373 kW
530 hp
395 kW
Torque
460 Nm
339 lb-ft
700 Nm
516 lb-ft
Acceleration
3.4 s
3.4 s
Top speed
318 km/h
198 mph
315 km/h
196 mph
Lightness
1,430 kg
3,153 lb
1,660 kg
3,660 lb
Fuel consumption
12.7 L/100 km
18.5 mpg US
22.2 mpg UK
11.5 L/100 km
20.5 mpg US
24.6 mpg UK
Practicality
Doors/seats
2 doors
2 seats
Trunk
125 L
4.4 cu ft
Length
4,562 mm
179.6 in
Height
1,271 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
504 km
313 mi
583 km
362 mi
CO2 score
288 g/km
-
Trunk score
125 L
4.4 cu ft
105 L
3.7 cu ft
Power-to-weight score
350 hp/t
261 kW/t
2.9 kg/hp
319 hp/t
238 kW/t
3.1 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 II) GT3 4.0Porsche 911 Cabriolet (997) Facelift 2008 Turbo S 3.8
Consumption12.7 L/100 km18.5 mpg US22.2 mpg UK11.5 L/100 km20.5 mpg US24.6 mpg UK
Cost / 100 km22.22 LC100 km20.13 LC100 km
Cost / 100 mi35.77 LC100 mi32.39 LC100 mi
Annual fuel used1,905 L503 US gal419 UK gal1,725 L456 US gal379 UK gal
Annual fuel cost3,334 LC/year3,019 LC/year

Head-to-head comparisons

Porsche 911 (991 II) GT3 4.0

  • Is 230 kg lighter
  • Has 3 km/h (2 mph) higher top speed
  • Has 30 hp/t better power-to-weight
  • Has 20 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

Porsche 911 Cabriolet (997) Facelift 2008 Turbo S 3.8

  • Has 30 hp more
  • Has 240 Nm more
  • Uses 1.2 L/100 km less fuel
  • Has 79 km (49 mi) more estimated range

Pros

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

Cons

  • Heaviest
  • Lowest top speed
  • Smallest trunk

Choose cars to compare

Brand
Model
Generation
Engine or modification
Porsche 911 (991 II) GT3 4.0
Porsche 911 Cabriolet (997) Turbo S 3.8
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