Car comparison

Porsche 911 (991 II) Carrera 4S 3.0vsPorsche 911 Cabriolet (991) Carrera 4 GTS 3.8

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

New comparison

Porsche 911 (991 II)

Carrera 4S 3.0

420 hp2981 ccGasolineAWDDual-clutchTwin-turboCoupe2015-2018
VS

Porsche 911 Cabriolet (991)

Carrera 4 GTS 3.8

430 hp3800 ccGasolineAWDDual-clutchNaturally 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 4S 3.0

  • Quickest 0-100 km/h
    4.0 s
  • Fastest top speed
    303 km/h
    188 mph
  • Highest torque
    500 Nm
    369 lb-ft
  • Lightest
    1,510 kg
    3,329 lb
  • Best power-to-weight
    278 hp/t
    207 kW/t
    3.6 kg/hp
  • Lowest combined fuel consumption
    7.9 L/100 km
    29.8 mpg US
    35.8 mpg UK
  • Lowest city consumption
    10.3 L/100 km
    22.8 mpg US
    27.4 mpg UK
  • Lowest highway consumption
    6.6 L/100 km
    35.6 mpg US
    42.8 mpg UK
  • Lowest CO2 emissions
    180 g/km
  • Best estimated range
    848 km
    527 mi
  • Best overall score
    69/100
  • Best performance score
    82/100
  • Best economy score
    86/100

Specification comparison

Specification comparison
ModelPorsche911 (991 II)Carrera 4S 3.0Porsche911 Cabriolet (991)Carrera 4 GTS 3.8
Power
420hp313kW
430hp321kW
Torque
500Nm369lb-ft
440Nm325lb-ft
Curb weight
1,510kg3,329lb
1,560kg3,439lb
Gross weight
1,965kg4,332lb
1,955kg4,310lb
Top speed
303 km/h
188 mph
301 km/h
187 mph
To 99% top speed
57.8s99% target: 300 km/h / 186 mph
Calculated
59.4s99% target: 298 km/h / 185 mph
Calculated
0-100 km/h
4.0s
4.2s
0-200 km/h
11.8s
Calculated
12.4s
Calculated
0-60 mph
3.8s
Calculated
4.0s
Calculated
Fuel consumption
7.9L/100 km29.8mpg US35.8mpg UK
9.2L/100 km25.6mpg US30.7mpg UK
Fuel consumption city
10.3L/100 km22.8mpg US27.4mpg UK
12.5L/100 km18.8mpg US22.6mpg UK
Fuel consumption highway
6.6L/100 km35.6mpg US42.8mpg UK
7.1L/100 km33.1mpg US39.8mpg UK
Quarter mile
11.8s
Calculated
12.1s
Calculated
Power-to-weight
278hp/t207kW/t126hp/1000 lb
Calculated
276hp/t206kW/t125hp/1000 lb
Calculated
Torque-to-weight
331Nm/t222lb-ft/ton
Calculated
282Nm/t189lb-ft/ton
Calculated
Estimated range
848km527mi
Calculated
739km459mi
Calculated
Displacement
2,981cc182cu in
3,800cc232cu in
Length
4,499mm177in
4,509mm178in
Width
1,852mm73in
1,852mm73in
Height
1,298mm51in
1,294mm51in
Wheelbase
2,450mm96in
2,450mm96in
Front track
1,543mm61in
1,538mm61in
Rear track
1,558mm61in
1,560mm61in
Trunk volume
125L
285L
Max trunk volume
260L
-
Doors
2
2
Seats
4
4
Fuel tank
67L
68L
CO2 emissions
180g/km
214g/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 4S 3.0Porsche 911 Cabriolet (991) Carrera 4 GTS 3.8PowerTorque
  • Porsche 911 (991 II) Carrera 4S 3.0: Power / Torque
  • Porsche 911 Cabriolet (991) Carrera 4 GTS 3.8: Power / Torque
Dyno simulation data table
VehiclePeak power RPMPeak torque RPMMax engine speed
Porsche911 (991 II)Carrera 4S 3.06,500 rpm1,700-5,000 rpm6,750 rpm
Porsche911 Cabriolet (991)Carrera 4 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 4S 3.0Porsche911 Cabriolet (991)Carrera 4 GTS 3.8
Acceleration checkpoints
0-60 mph
0-97 km/h
3.8 s
4.0 s
0-100 km/h
0-62 mph
4.0 s
4.2 s
0-200 km/h
0-124 mph
11.8 s
12.4 s
Top speed
303 km/h
188 mph
301 km/h
187 mph
Drag race simulation
60 ft
18 m
2.0 s
2.1 s
330 ft
101 m
5.3 s
5.4 s
1/8 mile
201 m
7.8 s
8.0 s
1000 ft
305 m
10.0 s
10.2 s
1/4 mile
402 m
11.8 s
12.1 s
Trap speed
1/4 mile
402 m
200 km/h
124 mph
197 km/h
123 mph

Power comparison

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

Chart data table
VehicleValue
Porsche911 (991 II)Carrera 4S 3.0
420 hp
313 kW
Porsche911 Cabriolet (991)Carrera 4 GTS 3.8
430 hp
321 kW

Porsche 911 Cabriolet (991) Carrera 4 GTS 3.8 has 10 hp more than Porsche 911 (991 II) Carrera 4S 3.0.

The biggest power difference is between Porsche 911 (991 II) Carrera 4S 3.0 and Porsche 911 Cabriolet (991) Carrera 4 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 4S 3.0
500 Nm
369 lb-ft
Porsche911 Cabriolet (991)Carrera 4 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 4S 3.0
1,510 kg
3,329 lb
Porsche911 Cabriolet (991)Carrera 4 GTS 3.8
1,560 kg
3,439 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 4S 3.0
303 km/h
188 mph
Porsche911 Cabriolet (991)Carrera 4 GTS 3.8
301 km/h
187 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 4S 3.04.0 s
Porsche911 Cabriolet (991)Carrera 4 GTS 3.84.2 s

Although Porsche 911 Cabriolet (991) Carrera 4 GTS 3.8 has more power, Porsche 911 (991 II) Carrera 4S 3.0 is quicker from 0-100 km/h.

The biggest 0-100 km/h difference is between Porsche 911 (991 II) Carrera 4S 3.0 and Porsche 911 Cabriolet (991) Carrera 4 GTS 3.8: 0.2 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 4S 3.0
7.9 L/100 km
29.8 mpg US
35.8 mpg UK
Porsche911 Cabriolet (991)Carrera 4 GTS 3.8
9.2 L/100 km
25.6 mpg US
30.7 mpg UK

The biggest fuel consumption difference is between Porsche 911 (991 II) Carrera 4S 3.0 and Porsche 911 Cabriolet (991) Carrera 4 GTS 3.8: 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 (991 II)Carrera 4S 3.0
278 hp/t
207 kW/t
3.6 kg/hp
Porsche911 Cabriolet (991)Carrera 4 GTS 3.8
276 hp/t
206 kW/t
3.6 kg/hp

Estimated range comparison

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

Chart data table
VehicleValue
Porsche911 (991 II)Carrera 4S 3.0
848 km
527 mi
Porsche911 Cabriolet (991)Carrera 4 GTS 3.8
739 km
459 mi

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
VehiclePowerAccelerationTop speed
Porsche911 (991 II)Carrera 4S 3.0
420 hp
313 kW
4.0 s
303 km/h
188 mph
Porsche911 Cabriolet (991)Carrera 4 GTS 3.8
430 hp
321 kW
4.2 s
301 km/h
187 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 4S 3.0
Power
420 hp
313 kW
0-100 km/h4.0 s
Top speed
303 km/h
188 mph
Doors/seats
2 doors
4 seats
Trunk
125 L
4.4 cu ft
Length
4,499 mm
177.1 in
Height
1,298 mm
51.1 in
Porsche911 Cabriolet (991)Carrera 4 GTS 3.8
Power
430 hp
321 kW
0-100 km/h4.2 s
Top speed
301 km/h
187 mph
Doors/seats
2 doors
4 seats
Trunk
285 L
10.1 cu ft
Length
4,509 mm
177.5 in
Height
1,294 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 4S 3.0
Power
420 hp
313 kW
0-100 km/h4.0 s
Top speed
303 km/h
188 mph
7.9 L/100 km
29.8 mpg US
35.8 mpg UK
Porsche911 Cabriolet (991)Carrera 4 GTS 3.8
Power
430 hp
321 kW
0-100 km/h4.2 s
Top speed
301 km/h
187 mph
9.2 L/100 km
25.6 mpg US
30.7 mpg UK

Porsche 911 (991 II) Carrera 4S 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 4S 3.0
7.9 L/100 km
29.8 mpg US
35.8 mpg UK
4.0 s
Porsche911 Cabriolet (991)Carrera 4 GTS 3.8
9.2 L/100 km
25.6 mpg US
30.7 mpg UK
4.2 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 4S 3.0
278 hp/t
207 kW/t
3.6 kg/hp
7.9 L/100 km
29.8 mpg US
35.8 mpg UK
Porsche911 Cabriolet (991)Carrera 4 GTS 3.8
276 hp/t
206 kW/t
3.6 kg/hp
9.2 L/100 km
25.6 mpg US
30.7 mpg UK

Detailed score breakdown

Detailed score breakdown
VehiclePorsche911 (991 II)Carrera 4S 3.0Porsche911 Cabriolet (991)Carrera 4 GTS 3.8
Power
420 hp
313 kW
430 hp
321 kW
Torque
500 Nm
369 lb-ft
440 Nm
325 lb-ft
Acceleration
4.0 s
4.2 s
Top speed
303 km/h
188 mph
301 km/h
187 mph
Lightness
1,510 kg
3,329 lb
1,560 kg
3,439 lb
Fuel consumption
7.9 L/100 km
29.8 mpg US
35.8 mpg UK
9.2 L/100 km
25.6 mpg US
30.7 mpg UK
Practicality
Doors/seats
2 doors
4 seats
Trunk
125 L
4.4 cu ft
Length
4,499 mm
177.1 in
Height
1,298 mm
51.1 in
Doors/seats
2 doors
4 seats
Trunk
285 L
10.1 cu ft
Length
4,509 mm
177.5 in
Height
1,294 mm
50.9 in
Range score
848 km
527 mi
739 km
459 mi
CO2 score
180 g/km
214 g/km
Trunk score
125 L
4.4 cu ft
285 L
10.1 cu ft
Power-to-weight score
278 hp/t
207 kW/t
3.6 kg/hp
276 hp/t
206 kW/t
3.6 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 4S 3.0Porsche 911 Cabriolet (991) Carrera 4 GTS 3.8
Consumption7.9 L/100 km29.8 mpg US35.8 mpg UK9.2 L/100 km25.6 mpg US30.7 mpg UK
Cost / 100 km13.83 LC100 km16.10 LC100 km
Cost / 100 mi22.25 LC100 mi25.91 LC100 mi
Annual fuel used1,185 L313 US gal261 UK gal1,380 L365 US gal304 UK gal
Annual fuel cost2,074 LC/year2,415 LC/year

Head-to-head comparisons

Porsche 911 (991 II) Carrera 4S 3.0

  • Has 60 Nm more
  • Is 50 kg lighter
  • Is 0.2 s quicker from 0-100 km/h
  • Has 2 km/h (1 mph) higher top speed
  • Uses 1.3 L/100 km less fuel
  • Has 3 hp/t better power-to-weight
  • Has 109 km (68 mi) more estimated range
  • Emits 34 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 4S 3.0
Porsche 911 Cabriolet (991) Carrera 4 GTS 3.8
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