Car comparison

Porsche 911 (991 II) Carrera S 3.0vsPorsche 911 Cabriolet (991) Carrera GTS 3.8

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

New comparison

Porsche 911 (991 II)

Carrera S 3.0

420 hp2981 ccGasolineRWDManualTwin-turboCoupe2015-2018
VS

Porsche 911 Cabriolet (991)

Carrera GTS 3.8

430 hp3800 ccGasolineRWDManualNaturally aspiratedCabriolet / convertible2014-2015

Comparison overview

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

Best choices

Porsche 911 (991 II) Carrera S 3.0

  • Quickest 0-100 km/h
    4.3 s
  • Fastest top speed
    315 km/h
    196 mph Unrestricted
    308 km/h
    191 mph Restricted
  • Highest torque
    500 Nm
    369 lb-ft
  • Lightest
    1,440 kg
    3,175 lb
  • Best power-to-weight
    292 hp/t
    217 kW/t
    3.4 kg/hp
  • Lowest combined fuel consumption
    8.7 L/100 km
    27.0 mpg US
    32.5 mpg UK
  • Lowest city consumption
    12.2 L/100 km
    19.3 mpg US
    23.2 mpg UK
  • Lowest highway consumption
    6.6 L/100 km
    35.6 mpg US
    42.8 mpg UK
  • Lowest CO2 emissions
    199 g/km
  • Best estimated range
    736 km
    457 mi
  • Best overall score
    70/100
  • Best performance score
    83/100
  • Best economy score
    83/100

Specification comparison

Specification comparison
ModelPorsche911 (991 II)Carrera S 3.0Porsche911 Cabriolet (991)Carrera GTS 3.8
Power
420hp313kW
430hp321kW
Torque
500Nm369lb-ft
440Nm325lb-ft
Curb weight
1,440kg3,175lb
1,495kg3,296lb
Gross weight
1,900kg4,189lb
1,905kg4,200lb
Top speed
Unrestricted
315 km/h196 mph
Restricted
308 km/h191 mph
Calculated
304 km/h
189 mph
To 99% top speed
63.3s99% target: 312 km/h / 194 mph
Calculated
64.4s99% target: 301 km/h / 187 mph
Calculated
0-100 km/h
4.3s
4.6s
0-200 km/h
12.3s
Calculated
13.4s
Calculated
0-60 mph
4.1s
Calculated
4.4s
Calculated
Fuel consumption
8.7L/100 km27mpg US32.5mpg UK
9.7L/100 km24.2mpg US29.1mpg UK
Fuel consumption city
12.2L/100 km19.3mpg US23.2mpg UK
13.7L/100 km17.2mpg US20.6mpg UK
Fuel consumption highway
6.6L/100 km35.6mpg US42.8mpg UK
7.6L/100 km30.9mpg US37.2mpg UK
Quarter mile
12.1s
Calculated
12.5s
Calculated
Power-to-weight
292hp/t217kW/t132hp/1000 lb
Calculated
288hp/t214kW/t130hp/1000 lb
Calculated
Torque-to-weight
347Nm/t232lb-ft/ton
Calculated
294Nm/t197lb-ft/ton
Calculated
Estimated range
736km457mi
Calculated
660km410mi
Calculated
Displacement
2,981cc182cu in
3,800cc232cu in
Length
4,499mm177in
4,509mm178in
Width
1,808mm71in
1,852mm73in
Height
1,302mm51in
1,292mm51in
Wheelbase
2,450mm96in
2,450mm96in
Front track
1,543mm61in
1,538mm61in
Rear track
1,518mm60in
1,560mm61in
Trunk volume
145L
285L
Max trunk volume
260L
-
Doors
2
2
Seats
4
4
Fuel tank
64L
64L
CO2 emissions
199g/km
228g/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) Carrera S 3.0Porsche 911 Cabriolet (991) Carrera GTS 3.8PowerTorque
  • Porsche 911 (991 II) Carrera S 3.0: Power / Torque
  • Porsche 911 Cabriolet (991) Carrera GTS 3.8: Power / Torque
Dyno simulation data table
VehiclePeak power RPMPeak torque RPMMax engine speed
Porsche911 (991 II)Carrera S 3.06,500 rpm1,700-5,000 rpm6,750 rpm
Porsche911 Cabriolet (991)Carrera GTS 3.87,500 rpm5,750 rpm7,750 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
MetricPorsche911 (991 II)Carrera S 3.0Porsche911 Cabriolet (991)Carrera GTS 3.8
Acceleration checkpoints
0-60 mph
0-97 km/h
4.1 s
4.4 s
0-100 km/h
0-62 mph
4.3 s
4.6 s
0-200 km/h
0-124 mph
12.3 s
13.4 s
Top speed
Unrestricted
315 km/h196 mph
Restricted
308 km/h191 mph
Likely limited
304 km/h
189 mph
Drag race simulation
60 ft
18 m
2.1 s
2.2 s
330 ft
101 m
5.4 s
5.6 s
1/8 mile
201 m
8.1 s
8.3 s
1000 ft
305 m
10.3 s
10.6 s
1/4 mile
402 m
12.1 s
12.5 s
Trap speed
1/4 mile
402 m
199 km/h
123 mph
193 km/h
120 mph

Power comparison

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

Chart data table
VehicleValue
Porsche911 (991 II)Carrera S 3.0
420 hp
313 kW
Porsche911 Cabriolet (991)Carrera GTS 3.8
430 hp
321 kW

Porsche 911 Cabriolet (991) Carrera GTS 3.8 has 10 hp more than Porsche 911 (991 II) Carrera S 3.0.

The biggest power difference is between Porsche 911 (991 II) Carrera S 3.0 and Porsche 911 Cabriolet (991) Carrera GTS 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)Carrera S 3.0
500 Nm
369 lb-ft
Porsche911 Cabriolet (991)Carrera GTS 3.8
440 Nm
325 lb-ft

Curb weight comparison

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

Chart data table
VehicleValue
Porsche911 (991 II)Carrera S 3.0
1,440 kg
3,175 lb
Porsche911 Cabriolet (991)Carrera GTS 3.8
1,495 kg
3,296 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)Carrera S 3.0
Unrestricted
315 km/h196 mph
Restricted
308 km/h191 mph
Porsche911 Cabriolet (991)Carrera GTS 3.8
304 km/h
189 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)Carrera S 3.04.3 s
Porsche911 Cabriolet (991)Carrera GTS 3.84.6 s

Although Porsche 911 Cabriolet (991) Carrera GTS 3.8 has more power, Porsche 911 (991 II) Carrera S 3.0 is quicker from 0-100 km/h.

The biggest 0-100 km/h difference is between Porsche 911 (991 II) Carrera S 3.0 and Porsche 911 Cabriolet (991) Carrera GTS 3.8: 0.3 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)Carrera S 3.0
8.7 L/100 km
27.0 mpg US
32.5 mpg UK
Porsche911 Cabriolet (991)Carrera GTS 3.8
9.7 L/100 km
24.2 mpg US
29.1 mpg UK

The biggest fuel consumption difference is between Porsche 911 (991 II) Carrera S 3.0 and Porsche 911 Cabriolet (991) Carrera GTS 3.8: 1.0 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)Carrera S 3.0
292 hp/t
217 kW/t
3.4 kg/hp
Porsche911 Cabriolet (991)Carrera GTS 3.8
288 hp/t
214 kW/t
3.5 kg/hp

Estimated range comparison

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

Chart data table
VehicleValue
Porsche911 (991 II)Carrera S 3.0
736 km
457 mi
Porsche911 Cabriolet (991)Carrera GTS 3.8
660 km
410 mi

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
VehiclePowerAccelerationTop speed
Porsche911 (991 II)Carrera S 3.0
420 hp
313 kW
4.3 s
Unrestricted
315 km/h196 mph
Restricted
308 km/h191 mph
Porsche911 Cabriolet (991)Carrera GTS 3.8
430 hp
321 kW
4.6 s
304 km/h
189 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)Carrera S 3.0
Power
420 hp
313 kW
0-100 km/h4.3 s
Top speed
Unrestricted
315 km/h196 mph
Restricted
308 km/h191 mph
Doors/seats
2 doors
4 seats
Trunk
145 L
5.1 cu ft
Length
4,499 mm
177.1 in
Height
1,302 mm
51.3 in
Porsche911 Cabriolet (991)Carrera GTS 3.8
Power
430 hp
321 kW
0-100 km/h4.6 s
Top speed
304 km/h
189 mph
Doors/seats
2 doors
4 seats
Trunk
285 L
10.1 cu ft
Length
4,509 mm
177.5 in
Height
1,292 mm
50.9 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)Carrera S 3.0
Power
420 hp
313 kW
0-100 km/h4.3 s
Top speed
Unrestricted
315 km/h196 mph
Restricted
308 km/h191 mph
8.7 L/100 km
27.0 mpg US
32.5 mpg UK
Porsche911 Cabriolet (991)Carrera GTS 3.8
Power
430 hp
321 kW
0-100 km/h4.6 s
Top speed
304 km/h
189 mph
9.7 L/100 km
24.2 mpg US
29.1 mpg UK

Porsche 911 (991 II) Carrera S 3.0 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)Carrera S 3.0
8.7 L/100 km
27.0 mpg US
32.5 mpg UK
4.3 s
Porsche911 Cabriolet (991)Carrera GTS 3.8
9.7 L/100 km
24.2 mpg US
29.1 mpg UK
4.6 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)Carrera S 3.0
292 hp/t
217 kW/t
3.4 kg/hp
8.7 L/100 km
27.0 mpg US
32.5 mpg UK
Porsche911 Cabriolet (991)Carrera GTS 3.8
288 hp/t
214 kW/t
3.5 kg/hp
9.7 L/100 km
24.2 mpg US
29.1 mpg UK

Detailed score breakdown

Detailed score breakdown
VehiclePorsche911 (991 II)Carrera S 3.0Porsche911 Cabriolet (991)Carrera GTS 3.8
Power
420 hp
313 kW
430 hp
321 kW
Torque
500 Nm
369 lb-ft
440 Nm
325 lb-ft
Acceleration
4.3 s
4.6 s
Top speed
Unrestricted
315 km/h196 mph
Restricted
308 km/h191 mph
304 km/h
189 mph
Lightness
1,440 kg
3,175 lb
1,495 kg
3,296 lb
Fuel consumption
8.7 L/100 km
27.0 mpg US
32.5 mpg UK
9.7 L/100 km
24.2 mpg US
29.1 mpg UK
Practicality
Doors/seats
2 doors
4 seats
Trunk
145 L
5.1 cu ft
Length
4,499 mm
177.1 in
Height
1,302 mm
51.3 in
Doors/seats
2 doors
4 seats
Trunk
285 L
10.1 cu ft
Length
4,509 mm
177.5 in
Height
1,292 mm
50.9 in
Range score
736 km
457 mi
660 km
410 mi
CO2 score
199 g/km
228 g/km
Trunk score
145 L
5.1 cu ft
285 L
10.1 cu ft
Power-to-weight score
292 hp/t
217 kW/t
3.4 kg/hp
288 hp/t
214 kW/t
3.5 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) Carrera S 3.0Porsche 911 Cabriolet (991) Carrera GTS 3.8
Consumption8.7 L/100 km27 mpg US32.5 mpg UK9.7 L/100 km24.2 mpg US29.1 mpg UK
Cost / 100 km15.22 LC100 km16.97 LC100 km
Cost / 100 mi24.50 LC100 mi27.32 LC100 mi
Annual fuel used1,305 L345 US gal287 UK gal1,455 L384 US gal320 UK gal
Annual fuel cost2,284 LC/year2,546 LC/year

Head-to-head comparisons

Porsche 911 (991 II) Carrera S 3.0

  • Has 60 Nm more
  • Is 55 kg lighter
  • Is 0.3 s quicker from 0-100 km/h
  • Has 11 km/h (7 mph) higher top speed
  • Uses 1.0 L/100 km less fuel
  • Has 4 hp/t better power-to-weight
  • Has 76 km (47 mi) more estimated range
  • Emits 29 g/km less CO2

Pros

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

Cons

  • Lowest power
  • Smallest trunk

Choose cars to compare

Brand
Model
Generation
Engine or modification
Porsche 911 (991 II) Carrera S 3.0
Porsche 911 Cabriolet (991) Carrera GTS 3.8
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