Car comparison

Porsche 911 (991) Carrera 3.4vsPorsche 718 Cayman (982) S 2.5

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

New comparison

Porsche 911 (991)

Carrera 3.4

350 hp3436 ccGasolineRWDDual-clutchNaturally aspiratedCoupe2011-2015
VS

Porsche 718 Cayman (982)

S 2.5

350 hp2497 ccGasolineRWDDual-clutchTurbochargedCoupe2020-present

Comparison overview

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

Best choices

Porsche 911 (991) Carrera 3.4

  • Quickest 0-100 km/h
    4.4 s
  • Fastest top speed
    287 km/h
    178 mph
  • Most powerful
    350 hp
    261 kW
  • Lowest combined fuel consumption
    8.2 L/100 km
    28.7 mpg US
    34.4 mpg UK
  • Lowest city consumption
    11.3 L/100 km
    20.8 mpg US
    25.0 mpg UK
  • Lowest highway consumption
    6.6 L/100 km
    35.6 mpg US
    42.8 mpg UK
  • Lowest CO2 emissions
    191 g/km
  • Best estimated range
    780 km
    485 mi
  • Largest trunk
    340 L
  • Best overall score
    66/100
  • Best economy score
    85/100
  • Best practicality score
    48/100

Porsche 718 Cayman (982) S 2.5

  • Highest torque
    420 Nm
    310 lb-ft
  • Lightest
    1,385 kg
    3,053 lb
  • Best power-to-weight
    253 hp/t
    188 kW/t
    4.0 kg/hp
  • Best performance score
    75/100

Specification comparison

Specification comparison
ModelPorsche911 (991)Carrera 3.4Porsche718 Cayman (982)S 2.5
Power
350hp261kW
350hp261kW
Torque
390Nm288lb-ft
420Nm310lb-ft
Curb weight
1,420kg3,131lb
1,385kg3,053lb
Gross weight
1,815kg4,001lb
1,695kg3,737lb
Top speed
287 km/h
178 mph
285 km/h
177 mph
To 99% top speed
60.0s99% target: 284 km/h / 177 mph
Calculated
73.7s99% target: 282 km/h / 175 mph
Calculated
0-100 km/h
4.4s
4.4s
0-200 km/h
13.6s
Calculated
15.0s
0-60 mph
4.2s
Calculated
4.2s
Calculated
Fuel consumption
8.2L/100 km28.7mpg US34.4mpg UK
8.8L/100 km26.7mpg US32.1mpg UK
Fuel consumption city
11.3L/100 km20.8mpg US25.0mpg UK
12.3L/100 km19.1mpg US23.0mpg UK
Fuel consumption highway
6.6L/100 km35.6mpg US42.8mpg UK
7L/100 km33.6mpg US40.4mpg UK
Quarter mile
12.3s
Calculated
12.5s
Calculated
Power-to-weight
246hp/t184kW/t112hp/1000 lb
Calculated
253hp/t188kW/t115hp/1000 lb
Calculated
Torque-to-weight
275Nm/t184lb-ft/ton
Calculated
303Nm/t203lb-ft/ton
Calculated
Estimated range
780km485mi
Calculated
727km452mi
Calculated
Displacement
3,436cc210cu in
2,497cc152cu in
Length
4,491mm177in
4,379mm172in
Width
1,808mm71in
1,801mm71in
Height
1,303mm51in
1,284mm51in
Wheelbase
2,450mm96in
2,475mm97in
Front track
1,532mm60in
1,515mm60in
Rear track
1,518mm60in
1,540mm61in
Trunk volume
340L
275L
Doors
2
2
Seats
4
2
Fuel tank
64L
64L
CO2 emissions
191g/km
200g/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) Carrera 3.4Porsche 718 Cayman (982) S 2.5PowerTorque
  • Porsche 911 (991) Carrera 3.4: Power / Torque
  • Porsche 718 Cayman (982) S 2.5: Power / Torque
Dyno simulation data table
VehiclePeak power RPMPeak torque RPMMax engine speed
Porsche911 (991)Carrera 3.47,400 rpm5,600 rpm7,650 rpm
Porsche718 Cayman (982)S 2.56,500 rpm2,100-4,500 rpm7,500 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
MetricPorsche911 (991)Carrera 3.4Porsche718 Cayman (982)S 2.5
Acceleration checkpoints
0-60 mph
0-97 km/h
4.2 s
4.2 s
0-100 km/h
0-62 mph
4.4 s
4.4 s
0-200 km/h
0-124 mph
13.6 s
15.0 s
Top speed
287 km/h
178 mph
285 km/h
177 mph
Drag race simulation
60 ft
18 m
2.1 s
2.0 s
330 ft
101 m
5.5 s
5.4 s
1/8 mile
201 m
8.1 s
8.1 s
1000 ft
305 m
10.4 s
10.5 s
1/4 mile
402 m
12.3 s
12.5 s
Trap speed
1/4 mile
402 m
191 km/h
119 mph
184 km/h
114 mph

Power comparison

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

Chart data table
VehicleValue
Porsche911 (991)Carrera 3.4
350 hp
261 kW
Porsche718 Cayman (982)S 2.5
350 hp
261 kW

Torque comparison

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

Chart data table
VehicleValue
Porsche911 (991)Carrera 3.4
390 Nm
288 lb-ft
Porsche718 Cayman (982)S 2.5
420 Nm
310 lb-ft

Curb weight comparison

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

Chart data table
VehicleValue
Porsche911 (991)Carrera 3.4
1,420 kg
3,131 lb
Porsche718 Cayman (982)S 2.5
1,385 kg
3,053 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)Carrera 3.4
287 km/h
178 mph
Porsche718 Cayman (982)S 2.5
285 km/h
177 mph

0-100 km/h comparison

Bar comparison chart for 0-100 km/h. Lower is better · seconds

Chart data table
VehicleValue
Porsche911 (991)Carrera 3.44.4 s
Porsche718 Cayman (982)S 2.54.4 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)Carrera 3.4
8.2 L/100 km
28.7 mpg US
34.4 mpg UK
Porsche718 Cayman (982)S 2.5
8.8 L/100 km
26.7 mpg US
32.1 mpg UK

The biggest fuel consumption difference is between Porsche 911 (991) Carrera 3.4 and Porsche 718 Cayman (982) S 2.5: 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)Carrera 3.4
246 hp/t
184 kW/t
4.1 kg/hp
Porsche718 Cayman (982)S 2.5
253 hp/t
188 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)Carrera 3.4
780 km
485 mi
Porsche718 Cayman (982)S 2.5
727 km
452 mi

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
VehiclePowerAccelerationTop speed
Porsche911 (991)Carrera 3.4
350 hp
261 kW
4.4 s
287 km/h
178 mph
Porsche718 Cayman (982)S 2.5
350 hp
261 kW
4.4 s
285 km/h
177 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)Carrera 3.4
Power
350 hp
261 kW
0-100 km/h4.4 s
Top speed
287 km/h
178 mph
Doors/seats
2 doors
4 seats
Trunk
340 L
12.0 cu ft
Length
4,491 mm
176.8 in
Height
1,303 mm
51.3 in
Porsche718 Cayman (982)S 2.5
Power
350 hp
261 kW
0-100 km/h4.4 s
Top speed
285 km/h
177 mph
Doors/seats
2 doors
2 seats
Trunk
275 L
9.7 cu ft
Length
4,379 mm
172.4 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)Carrera 3.4
Power
350 hp
261 kW
0-100 km/h4.4 s
Top speed
287 km/h
178 mph
8.2 L/100 km
28.7 mpg US
34.4 mpg UK
Porsche718 Cayman (982)S 2.5
Power
350 hp
261 kW
0-100 km/h4.4 s
Top speed
285 km/h
177 mph
8.8 L/100 km
26.7 mpg US
32.1 mpg UK

Porsche 911 (991) Carrera 3.4 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)Carrera 3.4
8.2 L/100 km
28.7 mpg US
34.4 mpg UK
4.4 s
Porsche718 Cayman (982)S 2.5
8.8 L/100 km
26.7 mpg US
32.1 mpg UK
4.4 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)Carrera 3.4
246 hp/t
184 kW/t
4.1 kg/hp
8.2 L/100 km
28.7 mpg US
34.4 mpg UK
Porsche718 Cayman (982)S 2.5
253 hp/t
188 kW/t
4.0 kg/hp
8.8 L/100 km
26.7 mpg US
32.1 mpg UK

Detailed score breakdown

Detailed score breakdown
VehiclePorsche911 (991)Carrera 3.4Porsche718 Cayman (982)S 2.5
Power
350 hp
261 kW
350 hp
261 kW
Torque
390 Nm
288 lb-ft
420 Nm
310 lb-ft
Acceleration
4.4 s
4.4 s
Top speed
287 km/h
178 mph
285 km/h
177 mph
Lightness
1,420 kg
3,131 lb
1,385 kg
3,053 lb
Fuel consumption
8.2 L/100 km
28.7 mpg US
34.4 mpg UK
8.8 L/100 km
26.7 mpg US
32.1 mpg UK
Practicality
Doors/seats
2 doors
4 seats
Trunk
340 L
12.0 cu ft
Length
4,491 mm
176.8 in
Height
1,303 mm
51.3 in
Doors/seats
2 doors
2 seats
Trunk
275 L
9.7 cu ft
Length
4,379 mm
172.4 in
Height
1,284 mm
50.6 in
Range score
780 km
485 mi
727 km
452 mi
CO2 score
191 g/km
200 g/km
Trunk score
340 L
12.0 cu ft
275 L
9.7 cu ft
Power-to-weight score
246 hp/t
184 kW/t
4.1 kg/hp
253 hp/t
188 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) Carrera 3.4Porsche 718 Cayman (982) S 2.5
Consumption8.2 L/100 km28.7 mpg US34.4 mpg UK8.8 L/100 km26.7 mpg US32.1 mpg UK
Cost / 100 km14.35 LC100 km15.40 LC100 km
Cost / 100 mi23.09 LC100 mi24.78 LC100 mi
Annual fuel used1,230 L325 US gal271 UK gal1,320 L349 US gal290 UK gal
Annual fuel cost2,153 LC/year2,310 LC/year

Head-to-head comparisons

Porsche 911 (991) Carrera 3.4

  • Has 2 km/h (1 mph) higher top speed
  • Uses 0.6 L/100 km less fuel
  • Has 53 km (33 mi) more estimated range
  • Has 65 L more trunk volume
  • Emits 9 g/km less CO2

Pros

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

Cons

  • Heaviest

Porsche 718 Cayman (982) S 2.5

  • Has 30 Nm more
  • Is 35 kg lighter
  • Has 6 hp/t better power-to-weight

Pros

  • Highest torque
  • Lightest
  • Best power-to-weight ratio

Cons

  • Highest combined fuel consumption
  • Lowest top speed
  • Smallest trunk
  • Highest CO2 emissions

Choose cars to compare

Brand
Model
Generation
Engine or modification
Porsche 911 (991) Carrera 3.4
Porsche 718 Cayman (982) S 2.5
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