Car comparison

Porsche 911 (991 II) Carrera 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 GTS 3.0

450 hp2981 ccGasolineRWDDual-clutchTwin-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 GTS 3.0

  • Quickest 0-100 km/h
    3.7 s
  • Fastest top speed
    320 km/h
    199 mph Unrestricted
    310 km/h
    193 mph Restricted
  • Most powerful
    450 hp
    336 kW
  • Highest torque
    550 Nm
    406 lb-ft
  • Lightest
    1,470 kg
    3,241 lb
  • Best power-to-weight
    306 hp/t
    228 kW/t
    3.3 kg/hp
  • Lowest combined fuel consumption
    8.3 L/100 km
    28.3 mpg US
    34.0 mpg UK
  • Lowest city consumption
    10.7 L/100 km
    22.0 mpg US
    26.4 mpg UK
  • Lowest highway consumption
    6.9 L/100 km
    34.1 mpg US
    40.9 mpg UK
  • Lowest CO2 emissions
    188 g/km
  • Best estimated range
    771 km
    479 mi
  • Largest trunk
    385 L
  • Best overall score
    75/100
  • Best performance score
    87/100
  • Best economy score
    85/100
  • Best practicality score
    51/100

Specification comparison

Specification comparison
ModelPorsche911 (991 II)Carrera GTS 3.0Porsche911 Cabriolet (991)Carrera GTS 3.8
Power
450hp336kW
430hp321kW
Torque
550Nm406lb-ft
440Nm325lb-ft
Curb weight
1,470kg3,241lb
1,515kg3,340lb
Gross weight
1,935kg4,266lb
1,925kg4,244lb
Top speed
Unrestricted
320 km/h199 mph
Restricted
310 km/h193 mph
Calculated
302 km/h
188 mph
To 99% top speed
86.6s99% target: 317 km/h / 197 mph
Calculated
58.7s99% target: 299 km/h / 186 mph
Calculated
0-100 km/h
3.7s
4.2s
0-200 km/h
12.4s
12.3s
Calculated
0-60 mph
3.5s
Calculated
4.0s
Calculated
Fuel consumption
8.3L/100 km28.3mpg US34.0mpg UK
8.9L/100 km26.4mpg US31.7mpg UK
Fuel consumption city
10.7L/100 km22mpg US26.4mpg UK
12.3L/100 km19.1mpg US23.0mpg UK
Fuel consumption highway
6.9L/100 km34.1mpg US40.9mpg UK
6.9L/100 km34.1mpg US40.9mpg UK
Quarter mile
11.7s
Calculated
12.0s
Calculated
Power-to-weight
306hp/t228kW/t139hp/1000 lb
Calculated
284hp/t212kW/t129hp/1000 lb
Calculated
Torque-to-weight
374Nm/t250lb-ft/ton
Calculated
290Nm/t194lb-ft/ton
Calculated
Estimated range
771km479mi
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
64L
64L
CO2 emissions
188g/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 GTS 3.0Porsche 911 Cabriolet (991) Carrera GTS 3.8PowerTorque
  • Porsche 911 (991 II) Carrera 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 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 GTS 3.0Porsche911 Cabriolet (991)Carrera GTS 3.8
Acceleration checkpoints
0-60 mph
0-97 km/h
3.5 s
4.0 s
0-100 km/h
0-62 mph
3.7 s
4.2 s
0-200 km/h
0-124 mph
12.4 s
12.3 s
Top speed
Unrestricted
320 km/h199 mph
Restricted
310 km/h193 mph
Likely limited
302 km/h
188 mph
Drag race simulation
60 ft
18 m
1.8 s
2.1 s
330 ft
101 m
5.0 s
5.4 s
1/8 mile
201 m
7.6 s
8.0 s
1000 ft
305 m
9.8 s
10.2 s
1/4 mile
402 m
11.7 s
12.0 s
Trap speed
1/4 mile
402 m
195 km/h
121 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 GTS 3.0
450 hp
336 kW
Porsche911 Cabriolet (991)Carrera GTS 3.8
430 hp
321 kW

Porsche 911 (991 II) Carrera 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 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 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 GTS 3.0
1,470 kg
3,241 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 GTS 3.0
Unrestricted
320 km/h199 mph
Restricted
310 km/h193 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 GTS 3.03.7 s
Porsche911 Cabriolet (991)Carrera GTS 3.84.2 s

The biggest 0-100 km/h difference is between Porsche 911 (991 II) Carrera GTS 3.0 and Porsche 911 Cabriolet (991) Carrera GTS 3.8: 0.5 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 GTS 3.0
8.3 L/100 km
28.3 mpg US
34.0 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 (991 II) Carrera GTS 3.0 and Porsche 911 Cabriolet (991) Carrera GTS 3.8: 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 GTS 3.0
306 hp/t
228 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 GTS 3.0
771 km
479 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 GTS 3.0
450 hp
336 kW
3.7 s
Unrestricted
320 km/h199 mph
Restricted
310 km/h193 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 GTS 3.0
Power
450 hp
336 kW
0-100 km/h3.7 s
Top speed
Unrestricted
320 km/h199 mph
Restricted
310 km/h193 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 GTS 3.0
Power
450 hp
336 kW
0-100 km/h3.7 s
Top speed
Unrestricted
320 km/h199 mph
Restricted
310 km/h193 mph
8.3 L/100 km
28.3 mpg US
34.0 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 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 GTS 3.0
8.3 L/100 km
28.3 mpg US
34.0 mpg UK
3.7 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 GTS 3.0
306 hp/t
228 kW/t
3.3 kg/hp
8.3 L/100 km
28.3 mpg US
34.0 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 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
3.7 s
4.2 s
Top speed
Unrestricted
320 km/h199 mph
Restricted
310 km/h193 mph
302 km/h
188 mph
Lightness
1,470 kg
3,241 lb
1,515 kg
3,340 lb
Fuel consumption
8.3 L/100 km
28.3 mpg US
34.0 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
771 km
479 mi
719 km
447 mi
CO2 score
188 g/km
207 g/km
Trunk score
385 L
13.6 cu ft
285 L
10.1 cu ft
Power-to-weight score
306 hp/t
228 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 GTS 3.0Porsche 911 Cabriolet (991) Carrera GTS 3.8
Consumption8.3 L/100 km28.3 mpg US34 mpg UK8.9 L/100 km26.4 mpg US31.7 mpg UK
Cost / 100 km14.53 LC100 km15.58 LC100 km
Cost / 100 mi23.38 LC100 mi25.07 LC100 mi
Annual fuel used1,245 L329 US gal274 UK gal1,335 L353 US gal294 UK gal
Annual fuel cost2,179 LC/year2,336 LC/year

Head-to-head comparisons

Porsche 911 (991 II) Carrera GTS 3.0

  • Has 20 hp more
  • Has 110 Nm more
  • Is 45 kg lighter
  • Is 0.5 s quicker from 0-100 km/h
  • Has 18 km/h (11 mph) higher top speed
  • Uses 0.6 L/100 km less fuel
  • Has 22 hp/t better power-to-weight
  • Has 52 km (32 mi) more estimated range
  • Has 100 L more trunk volume
  • Emits 19 g/km less CO2

Pros

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

Porsche 911 Cabriolet (991) Carrera GTS 3.8

No measurable advantages in the available data.

Cons

  • Slowest 0-100 km/h
  • Lowest power
  • Highest combined fuel consumption
  • Heaviest
  • Lowest top speed
  • Smallest trunk
  • Highest CO2 emissions

Choose cars to compare

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