Car comparison

Porsche 911 Cabriolet (991) 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 (991)

Turbo 3.8

520 hp3800 ccGasolineAWDDual-clutchTwin-turboCabriolet / convertible2013-2016
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 (991) Turbo 3.8

  • Fastest top speed
    315 km/h
    196 mph
  • Most powerful
    520 hp
    388 kW
  • Highest torque
    660 Nm
    487 lb-ft
  • Lowest combined fuel consumption
    9.9 L/100 km
    23.8 mpg US
    28.5 mpg UK
  • Best estimated range
    687 km
    427 mi
  • Largest trunk
    275 L
  • Best overall score
    76/100
  • Best performance score
    91/100
  • Best economy score
    80/100
  • Best practicality score
    43/100

Specification comparison

Specification comparison
ModelPorsche911 Cabriolet (991)Turbo 3.8Porsche718 Spyder (982)RS 4.0
Power
520hp388kW
500hp373kW
Torque
660Nm487lb-ft
450Nm332lb-ft
Curb weight
1,665kg3,671lb
1,410kg3,109lb
Gross weight
2,045kg4,508lb
1,755kg3,869lb
Top speed
315 km/h
196 mph
308 km/h
191 mph
To 99% top speed
51.1s99% target: 312 km/h / 194 mph
Calculated
63.1s99% target: 305 km/h / 189 mph
Calculated
0-100 km/h
3.5s
3.4s
0-200 km/h
10.0s
Calculated
10.9s
0-60 mph
3.3s
Calculated
3.2s
Calculated
Fuel consumption
9.9L/100 km23.8mpg US28.5mpg UK
13L/100 km18.1mpg US21.7mpg UK
Fuel consumption city
13.4L/100 km17.6mpg US21.1mpg UK
-
Fuel consumption highway
7.8L/100 km30.2mpg US36.2mpg UK
-
Quarter mile
11.2s
Calculated
11.3s
Calculated
Power-to-weight
312hp/t233kW/t142hp/1000 lb
Calculated
355hp/t264kW/t161hp/1000 lb
Calculated
Torque-to-weight
396Nm/t265lb-ft/ton
Calculated
319Nm/t214lb-ft/ton
Calculated
Estimated range
687km427mi
Calculated
415km258mi
Calculated
Displacement
3,800cc232cu in
3,996cc244cu in
Length
4,506mm177in
4,418mm174in
Width
1,880mm74in
1,822mm72in
Height
1,292mm51in
1,252mm49in
Wheelbase
2,450mm96in
2,482mm98in
Front track
1,541mm61in
1,545mm61in
Rear track
1,590mm63in
1,542mm61in
Ground clearance-
79mm3in
Trunk volume
275L
120L
Doors
2
2
Seats
4
2
Fuel tank
68L
54L
CO2 emissions
231g/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 (991) Turbo 3.8Porsche 718 Spyder (982) RS 4.0PowerTorque
  • Porsche 911 Cabriolet (991) 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 (991)Turbo 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 (991)Turbo 3.8Porsche718 Spyder (982)RS 4.0
Acceleration checkpoints
0-60 mph
0-97 km/h
3.3 s
3.2 s
0-100 km/h
0-62 mph
3.5 s
3.4 s
0-200 km/h
0-124 mph
10.0 s
10.9 s
Top speed
315 km/h
196 mph
308 km/h
191 mph
Drag race simulation
60 ft
18 m
1.9 s
1.8 s
330 ft
101 m
5.0 s
4.9 s
1/8 mile
201 m
7.4 s
7.3 s
1000 ft
305 m
9.4 s
9.5 s
1/4 mile
402 m
11.2 s
11.3 s
Trap speed
1/4 mile
402 m
212 km/h
132 mph
203 km/h
126 mph

Power comparison

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

Chart data table
VehicleValue
Porsche911 Cabriolet (991)Turbo 3.8
520 hp
388 kW
Porsche718 Spyder (982)RS 4.0
500 hp
373 kW

Porsche 911 Cabriolet (991) Turbo 3.8 has 20 hp more than Porsche 718 Spyder (982) RS 4.0.

The biggest power difference is between Porsche 718 Spyder (982) RS 4.0 and Porsche 911 Cabriolet (991) Turbo 3.8: 20 hp (15 kW).

Torque comparison

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

Chart data table
VehicleValue
Porsche911 Cabriolet (991)Turbo 3.8
660 Nm
487 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 (991)Turbo 3.8
1,665 kg
3,671 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 (991)Turbo 3.8
315 km/h
196 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 (991)Turbo 3.83.5 s
Porsche718 Spyder (982)RS 4.03.4 s

Although Porsche 911 Cabriolet (991) Turbo 3.8 has more power, Porsche 718 Spyder (982) RS 4.0 is quicker from 0-100 km/h.

The biggest 0-100 km/h difference is between Porsche 718 Spyder (982) RS 4.0 and Porsche 911 Cabriolet (991) Turbo 3.8: 0.1 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 (991)Turbo 3.8
9.9 L/100 km
23.8 mpg US
28.5 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 (991) Turbo 3.8 and Porsche 718 Spyder (982) RS 4.0: 3.1 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 (991)Turbo 3.8
312 hp/t
233 kW/t
3.2 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 (991)Turbo 3.8
687 km
427 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 (991)Turbo 3.8
520 hp
388 kW
3.5 s
315 km/h
196 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 (991)Turbo 3.8
Power
520 hp
388 kW
0-100 km/h3.5 s
Top speed
315 km/h
196 mph
Doors/seats
2 doors
4 seats
Trunk
275 L
9.7 cu ft
Length
4,506 mm
177.4 in
Height
1,292 mm
50.9 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 (991)Turbo 3.8
Power
520 hp
388 kW
0-100 km/h3.5 s
Top speed
315 km/h
196 mph
9.9 L/100 km
23.8 mpg US
28.5 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 (991) 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 (991)Turbo 3.8
9.9 L/100 km
23.8 mpg US
28.5 mpg UK
3.5 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 (991)Turbo 3.8
312 hp/t
233 kW/t
3.2 kg/hp
9.9 L/100 km
23.8 mpg US
28.5 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 (991)Turbo 3.8Porsche718 Spyder (982)RS 4.0
Power
520 hp
388 kW
500 hp
373 kW
Torque
660 Nm
487 lb-ft
450 Nm
332 lb-ft
Acceleration
3.5 s
3.4 s
Top speed
315 km/h
196 mph
308 km/h
191 mph
Lightness
1,665 kg
3,671 lb
1,410 kg
3,109 lb
Fuel consumption
9.9 L/100 km
23.8 mpg US
28.5 mpg UK
13.0 L/100 km
18.1 mpg US
21.7 mpg UK
Practicality
Doors/seats
2 doors
4 seats
Trunk
275 L
9.7 cu ft
Length
4,506 mm
177.4 in
Height
1,292 mm
50.9 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
687 km
427 mi
415 km
258 mi
CO2 score
231 g/km
-
Trunk score
275 L
9.7 cu ft
120 L
4.2 cu ft
Power-to-weight score
312 hp/t
233 kW/t
3.2 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 (991) Turbo 3.8Porsche 718 Spyder (982) RS 4.0
Consumption9.9 L/100 km23.8 mpg US28.5 mpg UK13 L/100 km18.1 mpg US21.7 mpg UK
Cost / 100 km17.33 LC100 km22.75 LC100 km
Cost / 100 mi27.88 LC100 mi36.61 LC100 mi
Annual fuel used1,485 L392 US gal327 UK gal1,950 L515 US gal429 UK gal
Annual fuel cost2,599 LC/year3,413 LC/year

Head-to-head comparisons

Porsche 911 Cabriolet (991) Turbo 3.8

  • Has 20 hp more
  • Has 210 Nm more
  • Has 7 km/h (4 mph) higher top speed
  • Uses 3.1 L/100 km less fuel
  • Has 271 km (169 mi) more estimated range
  • Has 155 L more trunk volume

Pros

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

Cons

  • Slowest 0-100 km/h
  • Heaviest

Porsche 718 Spyder (982) RS 4.0

  • Is 255 kg lighter
  • Is 0.1 s quicker from 0-100 km/h
  • Has 42 hp/t better power-to-weight

Pros

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

Cons

  • Lowest power
  • Highest combined fuel consumption
  • Lowest top speed
  • Smallest trunk

Choose cars to compare

Brand
Model
Generation
Engine or modification
Porsche 911 Cabriolet (991) Turbo 3.8
Porsche 718 Spyder (982) RS 4.0
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