Car comparison

Porsche 911 (991 II) Turbo 3.8vsPorsche 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)

Turbo 3.8

540 hp3800 ccGasolineAWDDual-clutchTwin-turboCoupe2015-2018
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 (991 II) Turbo 3.8

  • Quickest 0-100 km/h
    3.0 s
  • Fastest top speed
    330 km/h
    205 mph Unrestricted
    320 km/h
    199 mph Restricted
  • Most powerful
    540 hp
    403 kW
  • Highest torque
    710 Nm
    524 lb-ft
  • Lightest
    1,595 kg
    3,516 lb
  • Best power-to-weight
    339 hp/t
    252 kW/t
    3.0 kg/hp
  • Lowest combined fuel consumption
    9.1 L/100 km
    25.8 mpg US
    31.0 mpg UK
  • Lowest city consumption
    11.8 L/100 km
    19.9 mpg US
    23.9 mpg UK
  • Lowest highway consumption
    7.5 L/100 km
    31.4 mpg US
    37.7 mpg UK
  • Best estimated range
    747 km
    464 mi
  • Largest trunk
    115 L
  • Best performance score
    94/100
  • Best economy score
    82/100

Specification comparison

Specification comparison
ModelPorsche911 (991 II)Turbo 3.8Porsche911 Cabriolet (997)Facelift 2008Turbo S 3.8
Power
540hp403kW
530hp395kW
Torque
710Nm524lb-ft
700Nm516lb-ft
Curb weight
1,595kg3,516lb
1,660kg3,660lb
Gross weight
2,010kg4,431lb
2,010kg4,431lb
Top speed
Unrestricted
330 km/h205 mph
Restricted
320 km/h199 mph
Calculated
315 km/h
196 mph
To 99% top speed
45.8s99% target: 327 km/h / 203 mph
Calculated
74.1s99% target: 312 km/h / 194 mph
Calculated
0-100 km/h
3.0s
3.4s
0-200 km/h
8.3s
Calculated
11.3s
0-60 mph
2.9s
Calculated
3.2s
Calculated
Fuel consumption
9.1L/100 km25.8mpg US31.0mpg UK
11.5L/100 km20.5mpg US24.6mpg UK
Fuel consumption city
11.8L/100 km19.9mpg US23.9mpg UK
16.7L/100 km14.1mpg US16.9mpg UK
Fuel consumption highway
7.5L/100 km31.4mpg US37.7mpg UK
8.2L/100 km28.7mpg US34.4mpg UK
Quarter mile
10.4s
Calculated
11.3s
Calculated
Power-to-weight
339hp/t252kW/t154hp/1000 lb
Calculated
319hp/t238kW/t145hp/1000 lb
Calculated
Torque-to-weight
445Nm/t298lb-ft/ton
Calculated
422Nm/t282lb-ft/ton
Calculated
Estimated range
747km464mi
Calculated
583km362mi
Calculated
Displacement
3,800cc232cu in
3,800cc232cu in
Length
4,507mm177in
4,450mm175in
Width
1,880mm74in
1,852mm73in
Height
1,297mm51in
1,300mm51in
Wheelbase
2,450mm96in
2,350mm93in
Front track
1,541mm61in
-
Rear track
1,590mm63in
-
Trunk volume
115L
-
Max trunk volume
260L
105L
Doors
2
2
Seats
4
4
Fuel tank
68L
67L
CO2 emissions
212g/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) Turbo 3.8Porsche 911 Cabriolet (997) Facelift 2008 Turbo S 3.8PowerTorque
  • Porsche 911 (991 II) Turbo 3.8: 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)Turbo 3.86,400 rpm2,250-4,000 rpm6,650 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)Turbo 3.8Porsche911 Cabriolet (997)Facelift 2008Turbo S 3.8
Acceleration checkpoints
0-60 mph
0-97 km/h
2.9 s
3.2 s
0-100 km/h
0-62 mph
3.0 s
3.4 s
0-200 km/h
0-124 mph
8.3 s
11.3 s
0-200 mph
0-322 km/h
36.3 s
-
Top speed
Unrestricted
330 km/h205 mph
Restricted
320 km/h199 mph
Likely limited
315 km/h
196 mph
Drag race simulation
60 ft
18 m
1.8 s
1.8 s
330 ft
101 m
4.7 s
4.8 s
1/8 mile
201 m
6.9 s
7.4 s
1000 ft
305 m
8.8 s
9.5 s
1/4 mile
402 m
10.4 s
11.3 s
Trap speed
1/4 mile
402 m
226 km/h
141 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)Turbo 3.8
540 hp
403 kW
Porsche911 Cabriolet (997)Facelift 2008Turbo S 3.8
530 hp
395 kW

Porsche 911 (991 II) Turbo 3.8 has 10 hp more than Porsche 911 Cabriolet (997) Facelift 2008 Turbo S 3.8.

The biggest power difference is between Porsche 911 Cabriolet (997) Facelift 2008 Turbo S 3.8 and Porsche 911 (991 II) Turbo 3.8: 10 hp (7 kW).

Torque comparison

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

Chart data table
VehicleValue
Porsche911 (991 II)Turbo 3.8
710 Nm
524 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)Turbo 3.8
1,595 kg
3,516 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)Turbo 3.8
Unrestricted
330 km/h205 mph
Restricted
320 km/h199 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)Turbo 3.83.0 s
Porsche911 Cabriolet (997)Facelift 2008Turbo S 3.83.4 s

The biggest 0-100 km/h difference is between Porsche 911 (991 II) Turbo 3.8 and Porsche 911 Cabriolet (997) Facelift 2008 Turbo S 3.8: 0.4 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 II)Turbo 3.8
9.1 L/100 km
25.8 mpg US
31.0 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 (991 II) Turbo 3.8 and Porsche 911 Cabriolet (997) Facelift 2008 Turbo S 3.8: 2.4 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)Turbo 3.8
339 hp/t
252 kW/t
3.0 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)Turbo 3.8
747 km
464 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)Turbo 3.8
540 hp
403 kW
3.0 s
Unrestricted
330 km/h205 mph
Restricted
320 km/h199 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)Turbo 3.8
Power
540 hp
403 kW
0-100 km/h3.0 s
Top speed
Unrestricted
330 km/h205 mph
Restricted
320 km/h199 mph
Doors/seats
2 doors
4 seats
Trunk
115 L
4.1 cu ft
Length
4,507 mm
177.4 in
Height
1,297 mm
51.1 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)Turbo 3.8
Power
540 hp
403 kW
0-100 km/h3.0 s
Top speed
Unrestricted
330 km/h205 mph
Restricted
320 km/h199 mph
9.1 L/100 km
25.8 mpg US
31.0 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 (991 II) 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 II)Turbo 3.8
9.1 L/100 km
25.8 mpg US
31.0 mpg UK
3.0 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)Turbo 3.8
339 hp/t
252 kW/t
3.0 kg/hp
9.1 L/100 km
25.8 mpg US
31.0 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)Turbo 3.8Porsche911 Cabriolet (997)Facelift 2008Turbo S 3.8
Power
540 hp
403 kW
530 hp
395 kW
Torque
710 Nm
524 lb-ft
700 Nm
516 lb-ft
Acceleration
3.0 s
3.4 s
Top speed
Unrestricted
330 km/h205 mph
Restricted
320 km/h199 mph
315 km/h
196 mph
Lightness
1,595 kg
3,516 lb
1,660 kg
3,660 lb
Fuel consumption
9.1 L/100 km
25.8 mpg US
31.0 mpg UK
11.5 L/100 km
20.5 mpg US
24.6 mpg UK
Practicality
Doors/seats
2 doors
4 seats
Trunk
115 L
4.1 cu ft
Length
4,507 mm
177.4 in
Height
1,297 mm
51.1 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
747 km
464 mi
583 km
362 mi
CO2 score
212 g/km
-
Trunk score
115 L
4.1 cu ft
105 L
3.7 cu ft
Power-to-weight score
339 hp/t
252 kW/t
3.0 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) Turbo 3.8Porsche 911 Cabriolet (997) Facelift 2008 Turbo S 3.8
Consumption9.1 L/100 km25.8 mpg US31 mpg UK11.5 L/100 km20.5 mpg US24.6 mpg UK
Cost / 100 km15.92 LC100 km20.13 LC100 km
Cost / 100 mi25.63 LC100 mi32.39 LC100 mi
Annual fuel used1,365 L361 US gal300 UK gal1,725 L456 US gal379 UK gal
Annual fuel cost2,389 LC/year3,019 LC/year

Head-to-head comparisons

Porsche 911 (991 II) Turbo 3.8

  • Has 10 hp more
  • Has 10 Nm more
  • Is 65 kg lighter
  • Is 0.4 s quicker from 0-100 km/h
  • Has 15 km/h (9 mph) higher top speed
  • Uses 2.4 L/100 km less fuel
  • Has 19 hp/t better power-to-weight
  • Has 165 km (102 mi) more estimated range
  • Has 10 L more trunk volume

Pros

  • Quickest 0-100 km/h in this comparison
  • Highest top speed
  • Most powerful
  • Highest torque
  • Lightest
  • Lowest combined fuel consumption
  • Best power-to-weight ratio
  • Best estimated range
  • Largest trunk

Choose cars to compare

Brand
Model
Generation
Engine or modification
Porsche 911 (991 II) Turbo 3.8
Porsche 911 Cabriolet (997) Turbo S 3.8
Compare selected cars
2 vehicles selected

Popular comparisons

Turbo 3.8
Turbo S 3.8
VS
Porsche911 (991 II)Turbo 3.8vsPorsche911 (991)Turbo S 3.8
Turbo S 3.8
Turbo 3.8
VS
Porsche911 Cabriolet (997)Facelift 2008Turbo S 3.8vsPorsche911 Cabriolet (991)Turbo 3.8
Turbo 3.8
Turbo S 3.8
VS
Porsche911 (991 II)Turbo 3.8vsPorsche911 (997)Facelift 2008Turbo S 3.8
Turbo S 3.8
Turbo 3.6
VS
Porsche911 Cabriolet (997)Facelift 2008Turbo S 3.8vsPorsche911 Cabriolet (997)Turbo 3.6
Turbo 3.8
Turbo 3.8
VS
Porsche911 (991 II)Turbo 3.8vsPorsche911 (992)Turbo 3.8
Turbo 3.8
GT3 4.0
VS
Porsche911 (991 II)Turbo 3.8vsPorsche911 (992)Facelift 2024GT3 4.0
Turbo S 3.8
GT3 S/C 4.0
VS
Porsche911 Cabriolet (997)Facelift 2008Turbo S 3.8vsPorsche911 Cabriolet (992)Facelift 2024GT3 S/C 4.0
Turbo 3.8
GT2 3.6
VS
Porsche911 (991 II)Turbo 3.8vsPorsche911 (997)GT2 3.6
Turbo S 3.8
Turbo 3.8
VS
Porsche911 Cabriolet (997)Facelift 2008Turbo S 3.8vsPorsche911 Cabriolet (992)Turbo 3.8
Turbo 3.8
3.0
VS
Porsche911 (991 II)Turbo 3.8vsPorsche911 Dakar (992)3.0
Turbo 3.8
GT2 3.6
VS
Porsche911 (991 II)Turbo 3.8vsPorsche911 (996)Facelift 2001GT2 3.6
Turbo S 3.8
GT3 4.0
VS
Porsche911 Cabriolet (997)Facelift 2008Turbo S 3.8vsPorsche911 (991 II)GT3 4.0
Porsche 911 (991 II) Turbo 3.8 vs Porsche 911 Cabriolet (997) · Facelift 2008 Turbo S 3.8 - car comparison - FastVsFaster