Car comparison

Porsche 911 (991 II) Carrera 3.0vsPorsche Cayman (981C) GTS 3.4

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

New comparison

Porsche 911 (991 II)

Carrera 3.0

370 hp2981 ccGasolineRWDManualTwin-turboCoupe2015-2018
VS

Porsche Cayman (981C)

GTS 3.4

340 hp3436 ccGasolineRWDDual-clutchNaturally aspiratedCoupe2014-2016

Comparison overview

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

Best choices

Porsche 911 (991 II) Carrera 3.0

  • Quickest 0-100 km/h
    4.6 s
  • Fastest top speed
    295 km/h
    183 mph
  • Most powerful
    370 hp
    276 kW
  • Highest torque
    450 Nm
    332 lb-ft
  • Best power-to-weight
    259 hp/t
    193 kW/t
    3.9 kg/hp
  • Lowest highway consumption
    6.3 L/100 km
    37.3 mpg US
    44.8 mpg UK
  • Lowest CO2 emissions
    190 g/km
  • Best overall score
    65/100
  • Best performance score
    77/100
  • Best economy score
    85/100

Porsche Cayman (981C) GTS 3.4

  • Lightest
    1,375 kg
    3,031 lb
  • Lowest combined fuel consumption
    8.2 L/100 km
    28.7 mpg US
    34.4 mpg UK
  • Lowest city consumption
    11.4 L/100 km
    20.6 mpg US
    24.8 mpg UK
  • Best estimated range
    780 km
    485 mi
  • Largest trunk
    425 L
  • Best practicality score
    42/100

Specification comparison

Specification comparison
ModelPorsche911 (991 II)Carrera 3.0PorscheCayman (981C)GTS 3.4
Power
370hp276kW
340hp254kW
Torque
450Nm332lb-ft
380Nm280lb-ft
Curb weight
1,430kg3,153lb
1,375kg3,031lb
Gross weight
1,875kg4,134lb
1,695kg3,737lb
Top speed
295 km/h
183 mph
283 km/h
176 mph
To 99% top speed
63.9s99% target: 292 km/h / 181 mph
Calculated
65.0s99% target: 280 km/h / 174 mph
Calculated
0-100 km/h
4.6s
4.8s
0-200 km/h
13.8s
Calculated
15.1s
Calculated
0-60 mph
4.4s
Calculated
4.6s
Calculated
Fuel consumption
8.3L/100 km28.3mpg US34.0mpg UK
8.2L/100 km28.7mpg US34.4mpg UK
Fuel consumption city
11.7L/100 km20.1mpg US24.1mpg UK
11.4L/100 km20.6mpg US24.8mpg UK
Fuel consumption highway
6.3L/100 km37.3mpg US44.8mpg UK
6.3L/100 km37.3mpg US44.8mpg UK
Quarter mile
12.5s
Calculated
12.8s
Calculated
Power-to-weight
259hp/t193kW/t117hp/1000 lb
Calculated
247hp/t184kW/t112hp/1000 lb
Calculated
Torque-to-weight
315Nm/t211lb-ft/ton
Calculated
276Nm/t185lb-ft/ton
Calculated
Estimated range
771km479mi
Calculated
780km485mi
Calculated
Displacement
2,981cc182cu in
3,436cc210cu in
Length
4,499mm177in
4,404mm173in
Width
1,808mm71in
1,801mm71in
Height
1,294mm51in
1,284mm51in
Wheelbase
2,450mm96in
2,475mm97in
Trunk volume
145L
425L
Doors
2
2
Seats
4
2
Fuel tank
64L
64L
CO2 emissions
190g/km
190g/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 3.0Porsche Cayman (981C) GTS 3.4PowerTorque
  • Porsche 911 (991 II) Carrera 3.0: Power / Torque
  • Porsche Cayman (981C) GTS 3.4: Power / Torque
Dyno simulation data table
VehiclePeak power RPMPeak torque RPMMax engine speed
Porsche911 (991 II)Carrera 3.06,500 rpm1,700-5,000 rpm6,750 rpm
PorscheCayman (981C)GTS 3.47,400 rpm4,750-5,800 rpm7,650 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
MetricPorsche911 (991 II)Carrera 3.0PorscheCayman (981C)GTS 3.4
Acceleration checkpoints
0-60 mph
0-97 km/h
4.4 s
4.6 s
0-100 km/h
0-62 mph
4.6 s
4.8 s
0-200 km/h
0-124 mph
13.8 s
15.1 s
Top speed
295 km/h
183 mph
283 km/h
176 mph
Drag race simulation
60 ft
18 m
2.2 s
2.2 s
330 ft
101 m
5.6 s
5.7 s
1/8 mile
201 m
8.3 s
8.4 s
1000 ft
305 m
10.6 s
10.8 s
1/4 mile
402 m
12.5 s
12.8 s
Trap speed
1/4 mile
402 m
190 km/h
118 mph
185 km/h
115 mph

Power comparison

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

Chart data table
VehicleValue
Porsche911 (991 II)Carrera 3.0
370 hp
276 kW
PorscheCayman (981C)GTS 3.4
340 hp
254 kW

Porsche 911 (991 II) Carrera 3.0 has 30 hp more than Porsche Cayman (981C) GTS 3.4.

The biggest power difference is between Porsche Cayman (981C) GTS 3.4 and Porsche 911 (991 II) Carrera 3.0: 30 hp (22 kW).

Torque comparison

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

Chart data table
VehicleValue
Porsche911 (991 II)Carrera 3.0
450 Nm
332 lb-ft
PorscheCayman (981C)GTS 3.4
380 Nm
280 lb-ft

Curb weight comparison

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

Chart data table
VehicleValue
Porsche911 (991 II)Carrera 3.0
1,430 kg
3,153 lb
PorscheCayman (981C)GTS 3.4
1,375 kg
3,031 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 3.0
295 km/h
183 mph
PorscheCayman (981C)GTS 3.4
283 km/h
176 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 3.04.6 s
PorscheCayman (981C)GTS 3.44.8 s

The biggest 0-100 km/h difference is between Porsche 911 (991 II) Carrera 3.0 and Porsche Cayman (981C) GTS 3.4: 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 3.0
8.3 L/100 km
28.3 mpg US
34.0 mpg UK
PorscheCayman (981C)GTS 3.4
8.2 L/100 km
28.7 mpg US
34.4 mpg UK

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 3.0
259 hp/t
193 kW/t
3.9 kg/hp
PorscheCayman (981C)GTS 3.4
247 hp/t
184 kW/t
4.0 kg/hp

Estimated range comparison

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

Chart data table
VehicleValue
Porsche911 (991 II)Carrera 3.0
771 km
479 mi
PorscheCayman (981C)GTS 3.4
780 km
485 mi

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
VehiclePowerAccelerationTop speed
Porsche911 (991 II)Carrera 3.0
370 hp
276 kW
4.6 s
295 km/h
183 mph
PorscheCayman (981C)GTS 3.4
340 hp
254 kW
4.8 s
283 km/h
176 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 3.0
Power
370 hp
276 kW
0-100 km/h4.6 s
Top speed
295 km/h
183 mph
Doors/seats
2 doors
4 seats
Trunk
145 L
5.1 cu ft
Length
4,499 mm
177.1 in
Height
1,294 mm
50.9 in
PorscheCayman (981C)GTS 3.4
Power
340 hp
254 kW
0-100 km/h4.8 s
Top speed
283 km/h
176 mph
Doors/seats
2 doors
2 seats
Trunk
425 L
15.0 cu ft
Length
4,404 mm
173.4 in
Height
1,284 mm
50.6 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 3.0
Power
370 hp
276 kW
0-100 km/h4.6 s
Top speed
295 km/h
183 mph
8.3 L/100 km
28.3 mpg US
34.0 mpg UK
PorscheCayman (981C)GTS 3.4
Power
340 hp
254 kW
0-100 km/h4.8 s
Top speed
283 km/h
176 mph
8.2 L/100 km
28.7 mpg US
34.4 mpg UK

Porsche 911 (991 II) Carrera 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 3.0
8.3 L/100 km
28.3 mpg US
34.0 mpg UK
4.6 s
PorscheCayman (981C)GTS 3.4
8.2 L/100 km
28.7 mpg US
34.4 mpg UK
4.8 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 3.0
259 hp/t
193 kW/t
3.9 kg/hp
8.3 L/100 km
28.3 mpg US
34.0 mpg UK
PorscheCayman (981C)GTS 3.4
247 hp/t
184 kW/t
4.0 kg/hp
8.2 L/100 km
28.7 mpg US
34.4 mpg UK

Detailed score breakdown

Detailed score breakdown
VehiclePorsche911 (991 II)Carrera 3.0PorscheCayman (981C)GTS 3.4
Power
370 hp
276 kW
340 hp
254 kW
Torque
450 Nm
332 lb-ft
380 Nm
280 lb-ft
Acceleration
4.6 s
4.8 s
Top speed
295 km/h
183 mph
283 km/h
176 mph
Lightness
1,430 kg
3,153 lb
1,375 kg
3,031 lb
Fuel consumption
8.3 L/100 km
28.3 mpg US
34.0 mpg UK
8.2 L/100 km
28.7 mpg US
34.4 mpg UK
Practicality
Doors/seats
2 doors
4 seats
Trunk
145 L
5.1 cu ft
Length
4,499 mm
177.1 in
Height
1,294 mm
50.9 in
Doors/seats
2 doors
2 seats
Trunk
425 L
15.0 cu ft
Length
4,404 mm
173.4 in
Height
1,284 mm
50.6 in
Range score
771 km
479 mi
780 km
485 mi
CO2 score
190 g/km
190 g/km
Trunk score
145 L
5.1 cu ft
425 L
15.0 cu ft
Power-to-weight score
259 hp/t
193 kW/t
3.9 kg/hp
247 hp/t
184 kW/t
4.0 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 3.0Porsche Cayman (981C) GTS 3.4
Consumption8.3 L/100 km28.3 mpg US34 mpg UK8.2 L/100 km28.7 mpg US34.4 mpg UK
Cost / 100 km14.53 LC100 km14.35 LC100 km
Cost / 100 mi23.38 LC100 mi23.09 LC100 mi
Annual fuel used1,245 L329 US gal274 UK gal1,230 L325 US gal271 UK gal
Annual fuel cost2,179 LC/year2,153 LC/year

Head-to-head comparisons

Porsche 911 (991 II) Carrera 3.0

  • Has 30 hp more
  • Has 70 Nm more
  • Is 0.2 s quicker from 0-100 km/h
  • Has 12 km/h (7 mph) higher top speed
  • Has 11 hp/t better power-to-weight

Pros

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

Cons

  • Highest combined fuel consumption
  • Heaviest
  • Smallest trunk
  • Highest CO2 emissions

Porsche Cayman (981C) GTS 3.4

  • Is 55 kg lighter
  • Uses 0.1 L/100 km less fuel
  • Has 9 km (6 mi) more estimated range
  • Has 280 L more trunk volume

Pros

  • Lightest
  • Lowest combined fuel consumption
  • Best estimated range
  • Largest trunk

Cons

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

Choose cars to compare

Brand
Model
Generation
Engine or modification
Porsche 911 (991 II) Carrera 3.0
Porsche Cayman (981C) GTS 3.4
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