Car comparison

Porsche 911 (991 II) Carrera 4 GTS 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 4 GTS 3.0

450 hp2981 ccGasolineAWDManualTwin-turboCoupe2017-2018
VS

Porsche 911 Cabriolet (991)

Carrera GTS 3.8

430 hp3800 ccGasolineRWDDual-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 4 GTS 3.0

  • Quickest 0-100 km/h
    4.0 s
  • Fastest top speed
    310 km/h
    193 mph
  • Most powerful
    450 hp
    336 kW
  • Highest torque
    550 Nm
    406 lb-ft
  • Lightest
    1,495 kg
    3,296 lb
  • Best power-to-weight
    301 hp/t
    224 kW/t
    3.3 kg/hp
  • Largest trunk
    385 L
  • Best overall score
    74/100
  • Best performance score
    85/100
  • Best practicality score
    51/100

Porsche 911 Cabriolet (991) Carrera GTS 3.8

  • Lowest combined fuel consumption
    8.9 L/100 km
    26.4 mpg US
    31.7 mpg UK
  • Lowest city consumption
    12.3 L/100 km
    19.1 mpg US
    23.0 mpg UK
  • Lowest highway consumption
    6.9 L/100 km
    34.1 mpg US
    40.9 mpg UK
  • Lowest CO2 emissions
    207 g/km
  • Best estimated range
    719 km
    447 mi
  • Best economy score
    83/100

Specification comparison

Specification comparison
ModelPorsche911 (991 II)Carrera 4 GTS 3.0Porsche911 Cabriolet (991)Carrera GTS 3.8
Power
450hp336kW
430hp321kW
Torque
550Nm406lb-ft
440Nm325lb-ft
Curb weight
1,495kg3,296lb
1,515kg3,340lb
Gross weight
1,950kg4,299lb
1,925kg4,244lb
Top speed
310 km/h
193 mph
302 km/h
188 mph
To 99% top speed
87.8s99% target: 307 km/h / 191 mph
Calculated
58.7s99% target: 299 km/h / 186 mph
Calculated
0-100 km/h
4.0s
4.2s
0-200 km/h
13.6s
12.3s
Calculated
0-60 mph
3.8s
Calculated
4.0s
Calculated
Fuel consumption
9.5L/100 km24.8mpg US29.7mpg UK
8.9L/100 km26.4mpg US31.7mpg UK
Fuel consumption city
13L/100 km18.1mpg US21.7mpg UK
12.3L/100 km19.1mpg US23.0mpg UK
Fuel consumption highway
7.4L/100 km31.8mpg US38.2mpg UK
6.9L/100 km34.1mpg US40.9mpg UK
Quarter mile
12.1s
Calculated
12.0s
Calculated
Power-to-weight
301hp/t224kW/t137hp/1000 lb
Calculated
284hp/t212kW/t129hp/1000 lb
Calculated
Torque-to-weight
368Nm/t246lb-ft/ton
Calculated
290Nm/t194lb-ft/ton
Calculated
Estimated range
705km438mi
Calculated
719km447mi
Calculated
Displacement
2,981cc182cu in
3,800cc232cu in
Length
4,528mm178in
4,509mm178in
Width
1,852mm73in
1,852mm73in
Height
1,284mm51in
1,292mm51in
Wheelbase
2,450mm96in
2,450mm96in
Front track
1,541mm61in
1,538mm61in
Rear track
1,544mm61in
1,560mm61in
Trunk volume-
285L
Max trunk volume
385L
-
Doors
2
2
Seats
4
4
Fuel tank
67L
64L
CO2 emissions
216g/km
207g/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 4 GTS 3.0Porsche 911 Cabriolet (991) Carrera GTS 3.8PowerTorque
  • Porsche 911 (991 II) Carrera 4 GTS 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 4 GTS 3.06,500 rpm2,150-5,000 rpm7,500 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 4 GTS 3.0Porsche911 Cabriolet (991)Carrera 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
13.6 s
12.3 s
Top speed
310 km/h
193 mph
302 km/h
188 mph
Drag race simulation
60 ft
18 m
1.9 s
2.1 s
330 ft
101 m
5.2 s
5.4 s
1/8 mile
201 m
7.8 s
8.0 s
1000 ft
305 m
10.1 s
10.2 s
1/4 mile
402 m
12.1 s
12.0 s
Trap speed
1/4 mile
402 m
189 km/h
118 mph
198 km/h
123 mph

Power comparison

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

Chart data table
VehicleValue
Porsche911 (991 II)Carrera 4 GTS 3.0
450 hp
336 kW
Porsche911 Cabriolet (991)Carrera GTS 3.8
430 hp
321 kW

Porsche 911 (991 II) Carrera 4 GTS 3.0 has 20 hp more than Porsche 911 Cabriolet (991) Carrera GTS 3.8.

The biggest power difference is between Porsche 911 Cabriolet (991) Carrera GTS 3.8 and Porsche 911 (991 II) Carrera 4 GTS 3.0: 20 hp (15 kW).

Torque comparison

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

Chart data table
VehicleValue
Porsche911 (991 II)Carrera 4 GTS 3.0
550 Nm
406 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 4 GTS 3.0
1,495 kg
3,296 lb
Porsche911 Cabriolet (991)Carrera GTS 3.8
1,515 kg
3,340 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 4 GTS 3.0
310 km/h
193 mph
Porsche911 Cabriolet (991)Carrera GTS 3.8
302 km/h
188 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 4 GTS 3.04.0 s
Porsche911 Cabriolet (991)Carrera GTS 3.84.2 s

The biggest 0-100 km/h difference is between Porsche 911 (991 II) Carrera 4 GTS 3.0 and Porsche 911 Cabriolet (991) Carrera 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 4 GTS 3.0
9.5 L/100 km
24.8 mpg US
29.7 mpg UK
Porsche911 Cabriolet (991)Carrera GTS 3.8
8.9 L/100 km
26.4 mpg US
31.7 mpg UK

The biggest fuel consumption difference is between Porsche 911 Cabriolet (991) Carrera GTS 3.8 and Porsche 911 (991 II) Carrera 4 GTS 3.0: 0.6 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 4 GTS 3.0
301 hp/t
224 kW/t
3.3 kg/hp
Porsche911 Cabriolet (991)Carrera GTS 3.8
284 hp/t
212 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 4 GTS 3.0
705 km
438 mi
Porsche911 Cabriolet (991)Carrera GTS 3.8
719 km
447 mi

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
VehiclePowerAccelerationTop speed
Porsche911 (991 II)Carrera 4 GTS 3.0
450 hp
336 kW
4.0 s
310 km/h
193 mph
Porsche911 Cabriolet (991)Carrera GTS 3.8
430 hp
321 kW
4.2 s
302 km/h
188 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 4 GTS 3.0
Power
450 hp
336 kW
0-100 km/h4.0 s
Top speed
310 km/h
193 mph
Doors/seats
2 doors
4 seats
Trunk
385 L
13.6 cu ft
Length
4,528 mm
178.3 in
Height
1,284 mm
50.6 in
Porsche911 Cabriolet (991)Carrera GTS 3.8
Power
430 hp
321 kW
0-100 km/h4.2 s
Top speed
302 km/h
188 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 4 GTS 3.0
Power
450 hp
336 kW
0-100 km/h4.0 s
Top speed
310 km/h
193 mph
9.5 L/100 km
24.8 mpg US
29.7 mpg UK
Porsche911 Cabriolet (991)Carrera GTS 3.8
Power
430 hp
321 kW
0-100 km/h4.2 s
Top speed
302 km/h
188 mph
8.9 L/100 km
26.4 mpg US
31.7 mpg UK

Porsche 911 (991 II) Carrera 4 GTS 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 4 GTS 3.0
9.5 L/100 km
24.8 mpg US
29.7 mpg UK
4.0 s
Porsche911 Cabriolet (991)Carrera GTS 3.8
8.9 L/100 km
26.4 mpg US
31.7 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 4 GTS 3.0
301 hp/t
224 kW/t
3.3 kg/hp
9.5 L/100 km
24.8 mpg US
29.7 mpg UK
Porsche911 Cabriolet (991)Carrera GTS 3.8
284 hp/t
212 kW/t
3.5 kg/hp
8.9 L/100 km
26.4 mpg US
31.7 mpg UK

Detailed score breakdown

Detailed score breakdown
VehiclePorsche911 (991 II)Carrera 4 GTS 3.0Porsche911 Cabriolet (991)Carrera GTS 3.8
Power
450 hp
336 kW
430 hp
321 kW
Torque
550 Nm
406 lb-ft
440 Nm
325 lb-ft
Acceleration
4.0 s
4.2 s
Top speed
310 km/h
193 mph
302 km/h
188 mph
Lightness
1,495 kg
3,296 lb
1,515 kg
3,340 lb
Fuel consumption
9.5 L/100 km
24.8 mpg US
29.7 mpg UK
8.9 L/100 km
26.4 mpg US
31.7 mpg UK
Practicality
Doors/seats
2 doors
4 seats
Trunk
385 L
13.6 cu ft
Length
4,528 mm
178.3 in
Height
1,284 mm
50.6 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
705 km
438 mi
719 km
447 mi
CO2 score
216 g/km
207 g/km
Trunk score
385 L
13.6 cu ft
285 L
10.1 cu ft
Power-to-weight score
301 hp/t
224 kW/t
3.3 kg/hp
284 hp/t
212 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 4 GTS 3.0Porsche 911 Cabriolet (991) Carrera GTS 3.8
Consumption9.5 L/100 km24.8 mpg US29.7 mpg UK8.9 L/100 km26.4 mpg US31.7 mpg UK
Cost / 100 km16.63 LC100 km15.58 LC100 km
Cost / 100 mi26.76 LC100 mi25.07 LC100 mi
Annual fuel used1,425 L376 US gal313 UK gal1,335 L353 US gal294 UK gal
Annual fuel cost2,494 LC/year2,336 LC/year

Head-to-head comparisons

Porsche 911 (991 II) Carrera 4 GTS 3.0

  • Has 20 hp more
  • Has 110 Nm more
  • Is 20 kg lighter
  • Is 0.2 s quicker from 0-100 km/h
  • Has 8 km/h (5 mph) higher top speed
  • Has 17 hp/t better power-to-weight
  • Has 100 L more trunk volume

Pros

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

Cons

  • Highest combined fuel consumption
  • Highest CO2 emissions

Porsche 911 Cabriolet (991) Carrera GTS 3.8

  • Uses 0.6 L/100 km less fuel
  • Has 14 km (9 mi) more estimated range
  • Emits 9 g/km less CO2

Pros

  • Lowest combined fuel consumption
  • Best estimated range

Cons

  • Slowest 0-100 km/h
  • Lowest power
  • Heaviest
  • Lowest top speed
  • Smallest trunk

Choose cars to compare

Brand
Model
Generation
Engine or modification
Porsche 911 (991 II) Carrera 4 GTS 3.0
Porsche 911 Cabriolet (991) Carrera GTS 3.8
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