Car comparison

Porsche 911 (991) R 4.0vsPorsche 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)

R 4.0

500 hp3996 ccGasolineRWDManualNaturally aspiratedCoupe2016-2016
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

  • 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

Porsche 911 (991) R 4.0

  • Quickest 0-100 km/h
    3.8 s
  • Fastest top speed
    323 km/h
    201 mph
  • Most powerful
    500 hp
    373 kW
  • Lightest
    1,370 kg
    3,020 lb
  • Best power-to-weight
    365 hp/t
    272 kW/t
    2.7 kg/hp
  • Largest trunk
    125 L

Specification comparison

Specification comparison
ModelPorsche911 (991)R 4.0Porsche911 Cabriolet (997)Facelift 2008Turbo 3.8
Power
500hp373kW
500hp373kW
Torque
460Nm339lb-ft
650Nm479lb-ft
Curb weight
1,370kg3,020lb
1,645kg3,627lb
Gross weight
1,660kg3,660lb
1,995kg4,398lb
Top speed
323 km/h
201 mph
312 km/h
194 mph
To 99% top speed
71.6s99% target: 320 km/h / 199 mph
Calculated
55.9s99% target: 309 km/h / 192 mph
Calculated
0-100 km/h
3.8s
3.8s
0-200 km/h
11.6s
11.0s
Calculated
0-60 mph
3.6s
Calculated
3.6s
Calculated
Fuel consumption
13.3L/100 km17.7mpg US21.2mpg UK
11.7L/100 km20.1mpg US24.1mpg UK
Fuel consumption city
20.1L/100 km11.7mpg US14.1mpg UK
16.7L/100 km14.1mpg US16.9mpg UK
Fuel consumption highway
9.3L/100 km25.3mpg US30.4mpg UK
8.4L/100 km28mpg US33.6mpg UK
Quarter mile
11.7s
Calculated
11.6s
Calculated
Power-to-weight
365hp/t272kW/t166hp/1000 lb
Calculated
304hp/t227kW/t138hp/1000 lb
Calculated
Torque-to-weight
336Nm/t225lb-ft/ton
Calculated
395Nm/t264lb-ft/ton
Calculated
Estimated range
481km299mi
Calculated
573km356mi
Calculated
Displacement
3,996cc244cu in
3,800cc232cu in
Length
4,532mm178in
4,450mm175in
Width
1,852mm73in
1,852mm73in
Height
1,276mm50in
1,300mm51in
Wheelbase
2,475mm97in
2,350mm93in
Front track
1,551mm61in
-
Rear track
1,555mm61in
-
Trunk volume
125L
-
Max trunk volume-
105L
Doors
2
2
Seats
2
4
Fuel tank
64L
67L
CO2 emissions
308g/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 (991) R 4.0Porsche 911 Cabriolet (997) Facelift 2008 Turbo 3.8PowerTorque
  • Porsche 911 (991) R 4.0: 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)R 4.08,250 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)R 4.0Porsche911 Cabriolet (997)Facelift 2008Turbo 3.8
Acceleration checkpoints
0-60 mph
0-97 km/h
3.6 s
3.6 s
0-100 km/h
0-62 mph
3.8 s
3.8 s
0-200 km/h
0-124 mph
11.6 s
11.0 s
0-200 mph
0-322 km/h
90.9 s
-
Top speed
323 km/h
201 mph
312 km/h
194 mph
Drag race simulation
60 ft
18 m
1.9 s
2.0 s
330 ft
101 m
5.1 s
5.2 s
1/8 mile
201 m
7.7 s
7.6 s
1000 ft
305 m
9.8 s
9.8 s
1/4 mile
402 m
11.7 s
11.6 s
Trap speed
1/4 mile
402 m
201 km/h
125 mph
206 km/h
128 mph

Power comparison

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

Chart data table
VehicleValue
Porsche911 (991)R 4.0
500 hp
373 kW
Porsche911 Cabriolet (997)Facelift 2008Turbo 3.8
500 hp
373 kW

Torque comparison

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

Chart data table
VehicleValue
Porsche911 (991)R 4.0
460 Nm
339 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)R 4.0
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 (991)R 4.0
323 km/h
201 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)R 4.03.8 s
Porsche911 Cabriolet (997)Facelift 2008Turbo 3.83.8 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)R 4.0
13.3 L/100 km
17.7 mpg US
21.2 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 (991) R 4.0: 1.6 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)R 4.0
365 hp/t
272 kW/t
2.7 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 (991)R 4.0
481 km
299 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 (991)R 4.0
500 hp
373 kW
3.8 s
323 km/h
201 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 (991)R 4.0
Power
500 hp
373 kW
0-100 km/h3.8 s
Top speed
323 km/h
201 mph
Doors/seats
2 doors
2 seats
Trunk
125 L
4.4 cu ft
Length
4,532 mm
178.4 in
Height
1,276 mm
50.2 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 (991)R 4.0
Power
500 hp
373 kW
0-100 km/h3.8 s
Top speed
323 km/h
201 mph
13.3 L/100 km
17.7 mpg US
21.2 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 (991)R 4.0
13.3 L/100 km
17.7 mpg US
21.2 mpg UK
3.8 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 (991)R 4.0
365 hp/t
272 kW/t
2.7 kg/hp
13.3 L/100 km
17.7 mpg US
21.2 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 (991)R 4.0Porsche911 Cabriolet (997)Facelift 2008Turbo 3.8
Power
500 hp
373 kW
500 hp
373 kW
Torque
460 Nm
339 lb-ft
650 Nm
479 lb-ft
Acceleration
3.8 s
3.8 s
Top speed
323 km/h
201 mph
312 km/h
194 mph
Lightness
1,370 kg
3,020 lb
1,645 kg
3,627 lb
Fuel consumption
13.3 L/100 km
17.7 mpg US
21.2 mpg UK
11.7 L/100 km
20.1 mpg US
24.1 mpg UK
Practicality
Doors/seats
2 doors
2 seats
Trunk
125 L
4.4 cu ft
Length
4,532 mm
178.4 in
Height
1,276 mm
50.2 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
481 km
299 mi
573 km
356 mi
CO2 score
308 g/km
275 g/km
Trunk score
125 L
4.4 cu ft
105 L
3.7 cu ft
Power-to-weight score
365 hp/t
272 kW/t
2.7 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 (991) R 4.0Porsche 911 Cabriolet (997) Facelift 2008 Turbo 3.8
Consumption13.3 L/100 km17.7 mpg US21.2 mpg UK11.7 L/100 km20.1 mpg US24.1 mpg UK
Cost / 100 km23.28 LC100 km20.47 LC100 km
Cost / 100 mi37.46 LC100 mi32.95 LC100 mi
Annual fuel used1,995 L527 US gal439 UK gal1,755 L464 US gal386 UK gal
Annual fuel cost3,491 LC/year3,071 LC/year

Head-to-head comparisons

Porsche 911 (991) R 4.0

  • Is 275 kg lighter
  • Has 11 km/h (7 mph) higher top speed
  • Has 61 hp/t better power-to-weight
  • Has 20 L more trunk volume

Pros

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

Cons

  • Highest combined fuel consumption
  • Highest CO2 emissions

Porsche 911 Cabriolet (997) Facelift 2008 Turbo 3.8

  • Has 190 Nm more
  • Uses 1.6 L/100 km less fuel
  • Has 91 km (57 mi) more estimated range
  • Emits 33 g/km less CO2

Pros

  • 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) R 4.0
Porsche 911 Cabriolet (997) Turbo 3.8
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2 vehicles selected

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