Car comparison

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

420 hp2981 ccGasolineAWDManualTwin-turboCoupe2015-2018

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.

Porsche 911 (991 II) Carrera 4S 3.0

Quickest 0-100 km/h
4.2 s
Fastest top speed
305 km/h
190 mph
Highest torque
500 Nm
369 lb-ft
Lightest
1,490 kg
3,285 lb
Lowest combined fuel consumption
8.9 L/100 km
26.4 mpg US
31.7 mpg UK
Lowest highway consumption
6.8 L/100 km
34.6 mpg US
41.5 mpg UK
Lowest CO2 emissions
204 g/km
Best estimated range
764 km
475 mi
Best overall score
69/100
Best performance score
82/100
Best economy score
83/100

Porsche 911 Cabriolet (991) Carrera GTS 3.8

Most powerful
430 hp
321 kW
Best power-to-weight
284 hp/t
212 kW/t
3.5 kg/hp
Lowest city consumption
12.3 L/100 km
19.1 mpg US
23.0 mpg UK
Largest trunk
285 L
Best practicality score
44/100

Specification comparison

Specification comparison
Model	Porsche911 (991 II)Carrera 4S 3.0	Porsche911 Cabriolet (991)Carrera GTS 3.8
Power	420hp313kW	430hp321kW
Torque	500Nm369lb-ft	440Nm325lb-ft
Curb weight	1,490kg3,285lb	1,515kg3,340lb
Gross weight	1,950kg4,299lb	1,925kg4,244lb
Top speed	305 km/h 190 mph	302 km/h 188 mph
To 99% top speed	60.8s99% target: 302 km/h / 188 mph Calculated	58.7s99% target: 299 km/h / 186 mph Calculated
0-100 km/h	4.2s	4.2s
0-200 km/h	12.3s Calculated	12.3s Calculated
0-60 mph	4.0s Calculated	4.0s Calculated
Fuel consumption	8.9L/100 km26.4mpg US31.7mpg UK	8.9L/100 km26.4mpg US31.7mpg UK
Fuel consumption city	12.4L/100 km19mpg US22.8mpg UK	12.3L/100 km19.1mpg US23.0mpg UK
Fuel consumption highway	6.8L/100 km34.6mpg US41.5mpg UK	6.9L/100 km34.1mpg US40.9mpg UK
Quarter mile	12.0s Calculated	12.0s Calculated
Power-to-weight	282hp/t210kW/t128hp/1000 lb Calculated	284hp/t212kW/t129hp/1000 lb Calculated
Torque-to-weight	336Nm/t225lb-ft/ton Calculated	290Nm/t194lb-ft/ton Calculated
Estimated range	764km475mi Calculated	719km447mi Calculated
Displacement	2,981cc182cu in	3,800cc232cu in
Length	4,499mm177in	4,509mm178in
Width	1,852mm73in	1,852mm73in
Height	1,298mm51in	1,292mm51in
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	68L	64L
CO2 emissions	204g/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 4S 3.0Porsche 911 Cabriolet (991) Carrera GTS 3.8PowerTorque

Dyno simulation data table
Vehicle	Peak power RPM	Peak torque RPM	Max engine speed
Porsche911 (991 II)Carrera 4S 3.0	6,500 rpm	1,700-5,000 rpm	6,750 rpm
Porsche911 Cabriolet (991)Carrera GTS 3.8	7,500 rpm	5,750 rpm	7,750 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
Metric	Porsche911 (991 II)Carrera 4S 3.0	Porsche911 Cabriolet (991)Carrera GTS 3.8
	Acceleration checkpoints
0-60 mph 0-97 km/h	4.0 s	4.0 s
0-100 km/h 0-62 mph	4.2 s	4.2 s
0-200 km/h 0-124 mph	12.3 s	12.3 s
Top speed	305 km/h 190 mph	302 km/h 188 mph
	Drag race simulation
60 ft 18 m	2.1 s	2.1 s
330 ft 101 m	5.4 s	5.4 s
1/8 mile 201 m	8.0 s	8.0 s
1000 ft 305 m	10.2 s	10.2 s
1/4 mile 402 m	12.0 s	12.0 s
Trap speed 1/4 mile 402 m	198 km/h 123 mph	198 km/h 123 mph

Power comparison

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

Chart data table
Vehicle	Value
Porsche911 (991 II)Carrera 4S 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 4S 3.0.

The biggest power difference is between Porsche 911 (991 II) Carrera 4S 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
Vehicle	Value
Porsche911 (991 II)Carrera 4S 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
Vehicle	Value
Porsche911 (991 II)Carrera 4S 3.0	1,490 kg 3,285 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
Vehicle	Value
Porsche911 (991 II)Carrera 4S 3.0	305 km/h 190 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
Vehicle	Value
Porsche911 (991 II)Carrera 4S 3.0	4.2 s
Porsche911 Cabriolet (991)Carrera GTS 3.8	4.2 s

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

Fuel consumption comparison

Bar comparison chart for Fuel consumption. Lower is better · L/100 km / mpg US / mpg UK

Chart data table
Vehicle	Value
Porsche911 (991 II)Carrera 4S 3.0	8.9 L/100 km 26.4 mpg US 31.7 mpg UK
Porsche911 Cabriolet (991)Carrera GTS 3.8	8.9 L/100 km 26.4 mpg US 31.7 mpg UK

Power-to-weight comparison

Bar comparison chart for Power-to-weight. Higher is better · hp/t / kW/t

Chart data table
Vehicle	Value
Porsche911 (991 II)Carrera 4S 3.0	282 hp/t 210 kW/t 3.5 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
Vehicle	Value
Porsche911 (991 II)Carrera 4S 3.0	764 km 475 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
Vehicle	Power	Acceleration	Top speed
Porsche911 (991 II)Carrera 4S 3.0	420 hp 313 kW	4.2 s	305 km/h 190 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.

Vehicle

Performance score

Practicality score

Porsche911 (991 II)Carrera 4S 3.0

Power	420 hp 313 kW
0-100 km/h	4.2 s
Top speed 305 km/h 190 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 GTS 3.8

Power	430 hp 321 kW
0-100 km/h	4.2 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.

Vehicle

Performance score

Fuel economy score

Porsche911 (991 II)Carrera 4S 3.0

Power	420 hp 313 kW
0-100 km/h	4.2 s
Top speed 305 km/h 190 mph

8.9 L/100 km

26.4 mpg US

31.7 mpg UK

Porsche911 Cabriolet (991)Carrera GTS 3.8

Power	430 hp 321 kW
0-100 km/h	4.2 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 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
Vehicle	Fuel consumption, L/100 km	0-100 km/h, s
Porsche911 (991 II)Carrera 4S 3.0	8.9 L/100 km 26.4 mpg US 31.7 mpg UK	4.2 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
Vehicle	Power-to-weight, hp/t	Fuel consumption, L/100 km
Porsche911 (991 II)Carrera 4S 3.0	282 hp/t 210 kW/t 3.5 kg/hp	8.9 L/100 km 26.4 mpg US 31.7 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

Vehicle

Porsche911 (991 II)Carrera 4S 3.0

Porsche911 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

4.2 s

Top speed

305 km/h

190 mph

302 km/h

188 mph

Lightness

1,490 kg

3,285 lb

1,515 kg

3,340 lb

Fuel consumption

8.9 L/100 km

26.4 mpg US

31.7 mpg UK

8.9 L/100 km

26.4 mpg US

31.7 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	1,292 mm 50.9 in

Range score

764 km

475 mi

719 km

447 mi

CO2 score

204 g/km

207 g/km

Trunk score

125 L

4.4 cu ft

285 L

10.1 cu ft

Power-to-weight score

282 hp/t

210 kW/t

3.5 kg/hp

284 hp/t

212 kW/t

3.5 kg/hp

Overall

Fixed score

Fuel cost and annual usage

Estimate running costs from combined consumption, your annual distance, and the fuel price in your local currency.

Average annual distanceDistance unitFuel price in your local currencyPrice unit

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
Vehicle	Porsche 911 (991 II) Carrera 4S 3.0	Porsche 911 Cabriolet (991) Carrera GTS 3.8
Consumption	8.9 L/100 km26.4 mpg US31.7 mpg UK	8.9 L/100 km26.4 mpg US31.7 mpg UK
Cost / 100 km	15.58 LC100 km	15.58 LC100 km
Cost / 100 mi	25.07 LC100 mi	25.07 LC100 mi
Annual fuel used	1,335 L353 US gal294 UK gal	1,335 L353 US gal294 UK gal
Annual fuel cost	2,336 LC/year	2,336 LC/year