Car comparison

Porsche 911 Cabriolet (997) · Facelift 2008 Turbo 3.8vsPorsche 718 Spyder (982) RS 4.0

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

New comparison

Porsche 911 Cabriolet (997) · Facelift 2008

Turbo 3.8

500 hp3800 ccGasolineAWDManualTurbochargedCabriolet / convertible2009-2011
VS

Porsche 718 Spyder (982)

RS 4.0

500 hp3996 ccGasolineRWDDual-clutchNaturally aspiratedCabriolet / convertible2023-present

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

  • Fastest top speed
    312 km/h
    194 mph
  • Most powerful
    500 hp
    373 kW
  • Highest torque
    650 Nm
    479 lb-ft
  • Lowest combined fuel consumption
    11.7 L/100 km
    20.1 mpg US
    24.1 mpg UK
  • 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

Specification comparison

Specification comparison
ModelPorsche911 Cabriolet (997)Facelift 2008Turbo 3.8Porsche718 Spyder (982)RS 4.0
Power
500hp373kW
500hp373kW
Torque
650Nm479lb-ft
450Nm332lb-ft
Curb weight
1,645kg3,627lb
1,410kg3,109lb
Gross weight
1,995kg4,398lb
1,755kg3,869lb
Top speed
312 km/h
194 mph
308 km/h
191 mph
To 99% top speed
55.9s99% target: 309 km/h / 192 mph
Calculated
63.1s99% target: 305 km/h / 189 mph
Calculated
0-100 km/h
3.8s
3.4s
0-200 km/h
11.0s
Calculated
10.9s
0-60 mph
3.6s
Calculated
3.2s
Calculated
Fuel consumption
11.7L/100 km20.1mpg US24.1mpg UK
13L/100 km18.1mpg US21.7mpg UK
Fuel consumption city
16.7L/100 km14.1mpg US16.9mpg UK
-
Fuel consumption highway
8.4L/100 km28mpg US33.6mpg UK
-
Quarter mile
11.6s
Calculated
11.3s
Calculated
Power-to-weight
304hp/t227kW/t138hp/1000 lb
Calculated
355hp/t264kW/t161hp/1000 lb
Calculated
Torque-to-weight
395Nm/t264lb-ft/ton
Calculated
319Nm/t214lb-ft/ton
Calculated
Estimated range
573km356mi
Calculated
415km258mi
Calculated
Displacement
3,800cc232cu in
3,996cc244cu in
Length
4,450mm175in
4,418mm174in
Width
1,852mm73in
1,822mm72in
Height
1,300mm51in
1,252mm49in
Wheelbase
2,350mm93in
2,482mm98in
Front track-
1,545mm61in
Rear track-
1,542mm61in
Ground clearance-
79mm3in
Trunk volume-
120L
Max trunk volume
105L
-
Doors
2
2
Seats
4
2
Fuel tank
67L
54L
CO2 emissions
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 Cabriolet (997) Facelift 2008 Turbo 3.8Porsche 718 Spyder (982) RS 4.0PowerTorque
  • Porsche 911 Cabriolet (997) Facelift 2008 Turbo 3.8: Power / Torque
  • Porsche 718 Spyder (982) RS 4.0: Power / Torque
Dyno simulation data table
VehiclePeak power RPMPeak torque RPMMax engine speed
Porsche911 Cabriolet (997)Facelift 2008Turbo 3.86,000-6,500 rpm1,950-5,000 rpm6,750 rpm
Porsche718 Spyder (982)RS 4.08,400 rpm6,750 rpm9,000 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
MetricPorsche911 Cabriolet (997)Facelift 2008Turbo 3.8Porsche718 Spyder (982)RS 4.0
Acceleration checkpoints
0-60 mph
0-97 km/h
3.6 s
3.2 s
0-100 km/h
0-62 mph
3.8 s
3.4 s
0-200 km/h
0-124 mph
11.0 s
10.9 s
Top speed
312 km/h
194 mph
308 km/h
191 mph
Drag race simulation
60 ft
18 m
2.0 s
1.8 s
330 ft
101 m
5.2 s
4.9 s
1/8 mile
201 m
7.6 s
7.3 s
1000 ft
305 m
9.8 s
9.5 s
1/4 mile
402 m
11.6 s
11.3 s
Trap speed
1/4 mile
402 m
206 km/h
128 mph
203 km/h
126 mph

Power comparison

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

Chart data table
VehicleValue
Porsche911 Cabriolet (997)Facelift 2008Turbo 3.8
500 hp
373 kW
Porsche718 Spyder (982)RS 4.0
500 hp
373 kW

Torque comparison

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

Chart data table
VehicleValue
Porsche911 Cabriolet (997)Facelift 2008Turbo 3.8
650 Nm
479 lb-ft
Porsche718 Spyder (982)RS 4.0
450 Nm
332 lb-ft

Curb weight comparison

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

Chart data table
VehicleValue
Porsche911 Cabriolet (997)Facelift 2008Turbo 3.8
1,645 kg
3,627 lb
Porsche718 Spyder (982)RS 4.0
1,410 kg
3,109 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 Cabriolet (997)Facelift 2008Turbo 3.8
312 km/h
194 mph
Porsche718 Spyder (982)RS 4.0
308 km/h
191 mph

0-100 km/h comparison

Bar comparison chart for 0-100 km/h. Lower is better · seconds

Chart data table
VehicleValue
Porsche911 Cabriolet (997)Facelift 2008Turbo 3.83.8 s
Porsche718 Spyder (982)RS 4.03.4 s

The biggest 0-100 km/h difference is between Porsche 718 Spyder (982) RS 4.0 and Porsche 911 Cabriolet (997) Facelift 2008 Turbo 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 Cabriolet (997)Facelift 2008Turbo 3.8
11.7 L/100 km
20.1 mpg US
24.1 mpg UK
Porsche718 Spyder (982)RS 4.0
13.0 L/100 km
18.1 mpg US
21.7 mpg UK

The biggest fuel consumption difference is between Porsche 911 Cabriolet (997) Facelift 2008 Turbo 3.8 and Porsche 718 Spyder (982) RS 4.0: 1.3 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 Cabriolet (997)Facelift 2008Turbo 3.8
304 hp/t
227 kW/t
3.3 kg/hp
Porsche718 Spyder (982)RS 4.0
355 hp/t
264 kW/t
2.8 kg/hp

Estimated range comparison

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

Chart data table
VehicleValue
Porsche911 Cabriolet (997)Facelift 2008Turbo 3.8
573 km
356 mi
Porsche718 Spyder (982)RS 4.0
415 km
258 mi

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
VehiclePowerAccelerationTop speed
Porsche911 Cabriolet (997)Facelift 2008Turbo 3.8
500 hp
373 kW
3.8 s
312 km/h
194 mph
Porsche718 Spyder (982)RS 4.0
500 hp
373 kW
3.4 s
308 km/h
191 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 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
Porsche718 Spyder (982)RS 4.0
Power
500 hp
373 kW
0-100 km/h3.4 s
Top speed
308 km/h
191 mph
Doors/seats
2 doors
2 seats
Trunk
120 L
4.2 cu ft
Length
4,418 mm
173.9 in
Height
1,252 mm
49.3 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 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
Porsche718 Spyder (982)RS 4.0
Power
500 hp
373 kW
0-100 km/h3.4 s
Top speed
308 km/h
191 mph
13.0 L/100 km
18.1 mpg US
21.7 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 Cabriolet (997)Facelift 2008Turbo 3.8
11.7 L/100 km
20.1 mpg US
24.1 mpg UK
3.8 s
Porsche718 Spyder (982)RS 4.0
13.0 L/100 km
18.1 mpg US
21.7 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 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
Porsche718 Spyder (982)RS 4.0
355 hp/t
264 kW/t
2.8 kg/hp
13.0 L/100 km
18.1 mpg US
21.7 mpg UK

Detailed score breakdown

Detailed score breakdown
VehiclePorsche911 Cabriolet (997)Facelift 2008Turbo 3.8Porsche718 Spyder (982)RS 4.0
Power
500 hp
373 kW
500 hp
373 kW
Torque
650 Nm
479 lb-ft
450 Nm
332 lb-ft
Acceleration
3.8 s
3.4 s
Top speed
312 km/h
194 mph
308 km/h
191 mph
Lightness
1,645 kg
3,627 lb
1,410 kg
3,109 lb
Fuel consumption
11.7 L/100 km
20.1 mpg US
24.1 mpg UK
13.0 L/100 km
18.1 mpg US
21.7 mpg UK
Practicality
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
Doors/seats
2 doors
2 seats
Trunk
120 L
4.2 cu ft
Length
4,418 mm
173.9 in
Height
1,252 mm
49.3 in
Range score
573 km
356 mi
415 km
258 mi
CO2 score
275 g/km
-
Trunk score
105 L
3.7 cu ft
120 L
4.2 cu ft
Power-to-weight score
304 hp/t
227 kW/t
3.3 kg/hp
355 hp/t
264 kW/t
2.8 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 Cabriolet (997) Facelift 2008 Turbo 3.8Porsche 718 Spyder (982) RS 4.0
Consumption11.7 L/100 km20.1 mpg US24.1 mpg UK13 L/100 km18.1 mpg US21.7 mpg UK
Cost / 100 km20.47 LC100 km22.75 LC100 km
Cost / 100 mi32.95 LC100 mi36.61 LC100 mi
Annual fuel used1,755 L464 US gal386 UK gal1,950 L515 US gal429 UK gal
Annual fuel cost3,071 LC/year3,413 LC/year

Head-to-head comparisons

Porsche 911 Cabriolet (997) Facelift 2008 Turbo 3.8

  • Has 200 Nm more
  • Has 4 km/h (2 mph) higher top speed
  • Uses 1.3 L/100 km less fuel
  • Has 157 km (98 mi) more estimated range

Pros

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

Cons

  • Slowest 0-100 km/h
  • Heaviest
  • Smallest trunk

Porsche 718 Spyder (982) RS 4.0

  • Is 235 kg lighter
  • Is 0.4 s quicker from 0-100 km/h
  • Has 51 hp/t better power-to-weight
  • Has 15 L more trunk volume

Pros

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

Cons

  • Highest combined fuel consumption
  • Lowest top speed

Choose cars to compare

Brand
Model
Generation
Engine or modification
Porsche 911 Cabriolet (997) Turbo 3.8
Porsche 718 Spyder (982) RS 4.0
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2 vehicles selected

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