Car comparison

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

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

New comparison

Porsche 718 Boxster (982)

S 2.5

350 hp2497 ccGasolineRWDManualTurbochargedCabriolet / convertible2020-present
VS

Porsche 911 Cabriolet (991)

Carrera 3.4

350 hp3436 ccGasolineRWDDual-clutchNaturally aspiratedCabriolet / convertible2011-2015

Comparison overview

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

Best choices

Porsche 911 Cabriolet (991) Carrera 3.4

  • Lowest combined fuel consumption
    8.4 L/100 km
    28.0 mpg US
    33.6 mpg UK
  • Lowest city consumption
    11.5 L/100 km
    20.5 mpg US
    24.6 mpg UK
  • Lowest highway consumption
    6.7 L/100 km
    35.1 mpg US
    42.2 mpg UK
  • Lowest CO2 emissions
    195 g/km
  • Best estimated range
    762 km
    473 mi
  • Largest trunk
    290 L
  • Best overall score
    64/100
  • Best economy score
    84/100
  • Best practicality score
    44/100

Porsche 718 Boxster (982) S 2.5

  • Quickest 0-100 km/h
    4.6 s
  • Fastest top speed
    285 km/h
    177 mph
  • Most powerful
    350 hp
    261 kW
  • Highest torque
    420 Nm
    310 lb-ft
  • Lightest
    1,355 kg
    2,987 lb
  • Best power-to-weight
    258 hp/t
    193 kW/t
    3.9 kg/hp
  • Best performance score
    74/100

Specification comparison

Specification comparison
ModelPorsche718 Boxster (982)S 2.5Porsche911 Cabriolet (991)Carrera 3.4
Power
350hp261kW
350hp261kW
Torque
420Nm310lb-ft
390Nm288lb-ft
Curb weight
1,355kg2,987lb
1,490kg3,285lb
Gross weight
1,665kg3,671lb
1,870kg4,123lb
Top speed
285 km/h
177 mph
284 km/h
176 mph
To 99% top speed
71.7s99% target: 282 km/h / 175 mph
Calculated
63.2s99% target: 281 km/h / 175 mph
Calculated
0-100 km/h
4.6s
4.6s
0-200 km/h
15.2s
14.5s
Calculated
0-60 mph
4.4s
Calculated
4.4s
Calculated
Fuel consumption
9.6L/100 km24.5mpg US29.4mpg UK
8.4L/100 km28mpg US33.6mpg UK
Fuel consumption city
12.9L/100 km18.2mpg US21.9mpg UK
11.5L/100 km20.5mpg US24.6mpg UK
Fuel consumption highway
7.6L/100 km30.9mpg US37.2mpg UK
6.7L/100 km35.1mpg US42.2mpg UK
Quarter mile
12.7s
Calculated
12.6s
Calculated
Power-to-weight
258hp/t193kW/t117hp/1000 lb
Calculated
235hp/t175kW/t107hp/1000 lb
Calculated
Torque-to-weight
310Nm/t207lb-ft/ton
Calculated
262Nm/t175lb-ft/ton
Calculated
Estimated range
667km414mi
Calculated
762km473mi
Calculated
Displacement
2,497cc152cu in
3,436cc210cu in
Length
4,379mm172in
4,491mm177in
Width
1,801mm71in
1,808mm71in
Height
1,280mm50in
1,299mm51in
Wheelbase
2,475mm97in
2,450mm96in
Front track
1,515mm60in
1,532mm60in
Rear track
1,540mm61in
1,518mm60in
Trunk volume
125L
290L
Doors
2
2
Seats
2
4
Fuel tank
64L
64L
CO2 emissions
218g/km
195g/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 718 Boxster (982) S 2.5Porsche 911 Cabriolet (991) Carrera 3.4PowerTorque
  • Porsche 718 Boxster (982) S 2.5: Power / Torque
  • Porsche 911 Cabriolet (991) Carrera 3.4: Power / Torque
Dyno simulation data table
VehiclePeak power RPMPeak torque RPMMax engine speed
Porsche718 Boxster (982)S 2.56,500 rpm2,100-4,500 rpm7,500 rpm
Porsche911 Cabriolet (991)Carrera 3.47,400 rpm5,600 rpm7,650 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
MetricPorsche718 Boxster (982)S 2.5Porsche911 Cabriolet (991)Carrera 3.4
Acceleration checkpoints
0-60 mph
0-97 km/h
4.4 s
4.4 s
0-100 km/h
0-62 mph
4.6 s
4.6 s
0-200 km/h
0-124 mph
15.2 s
14.5 s
Top speed
285 km/h
177 mph
284 km/h
176 mph
Drag race simulation
60 ft
18 m
2.1 s
2.2 s
330 ft
101 m
5.5 s
5.6 s
1/8 mile
201 m
8.3 s
8.3 s
1000 ft
305 m
10.7 s
10.6 s
1/4 mile
402 m
12.7 s
12.6 s
Trap speed
1/4 mile
402 m
184 km/h
114 mph
187 km/h
116 mph

Power comparison

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

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

Torque comparison

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

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

Curb weight comparison

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

Chart data table
VehicleValue
Porsche718 Boxster (982)S 2.5
1,355 kg
2,987 lb
Porsche911 Cabriolet (991)Carrera 3.4
1,490 kg
3,285 lb

Top speed without limiter comparison

Bar comparison chart for Top speed without limiter. Higher is better · km/h / mph

Chart data table
VehicleValue
Porsche718 Boxster (982)S 2.5
285 km/h
177 mph
Porsche911 Cabriolet (991)Carrera 3.4
284 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
Porsche718 Boxster (982)S 2.54.6 s
Porsche911 Cabriolet (991)Carrera 3.44.6 s

Fuel consumption comparison

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

Chart data table
VehicleValue
Porsche718 Boxster (982)S 2.5
9.6 L/100 km
24.5 mpg US
29.4 mpg UK
Porsche911 Cabriolet (991)Carrera 3.4
8.4 L/100 km
28.0 mpg US
33.6 mpg UK

The biggest fuel consumption difference is between Porsche 911 Cabriolet (991) Carrera 3.4 and Porsche 718 Boxster (982) S 2.5: 1.2 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
Porsche718 Boxster (982)S 2.5
258 hp/t
193 kW/t
3.9 kg/hp
Porsche911 Cabriolet (991)Carrera 3.4
235 hp/t
175 kW/t
4.3 kg/hp

Estimated range comparison

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

Chart data table
VehicleValue
Porsche718 Boxster (982)S 2.5
667 km
414 mi
Porsche911 Cabriolet (991)Carrera 3.4
762 km
473 mi

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
VehiclePowerAccelerationTop speed
Porsche718 Boxster (982)S 2.5
350 hp
261 kW
4.6 s
285 km/h
177 mph
Porsche911 Cabriolet (991)Carrera 3.4
350 hp
261 kW
4.6 s
284 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
Porsche718 Boxster (982)S 2.5
Power
350 hp
261 kW
0-100 km/h4.6 s
Top speed
285 km/h
177 mph
Doors/seats
2 doors
2 seats
Trunk
125 L
4.4 cu ft
Length
4,379 mm
172.4 in
Height
1,280 mm
50.4 in
Porsche911 Cabriolet (991)Carrera 3.4
Power
350 hp
261 kW
0-100 km/h4.6 s
Top speed
284 km/h
176 mph
Doors/seats
2 doors
4 seats
Trunk
290 L
10.2 cu ft
Length
4,491 mm
176.8 in
Height
1,299 mm
51.1 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
Porsche718 Boxster (982)S 2.5
Power
350 hp
261 kW
0-100 km/h4.6 s
Top speed
285 km/h
177 mph
9.6 L/100 km
24.5 mpg US
29.4 mpg UK
Porsche911 Cabriolet (991)Carrera 3.4
Power
350 hp
261 kW
0-100 km/h4.6 s
Top speed
284 km/h
176 mph
8.4 L/100 km
28.0 mpg US
33.6 mpg UK

Porsche 911 Cabriolet (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
Porsche718 Boxster (982)S 2.5
9.6 L/100 km
24.5 mpg US
29.4 mpg UK
4.6 s
Porsche911 Cabriolet (991)Carrera 3.4
8.4 L/100 km
28.0 mpg US
33.6 mpg UK
4.6 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
Porsche718 Boxster (982)S 2.5
258 hp/t
193 kW/t
3.9 kg/hp
9.6 L/100 km
24.5 mpg US
29.4 mpg UK
Porsche911 Cabriolet (991)Carrera 3.4
235 hp/t
175 kW/t
4.3 kg/hp
8.4 L/100 km
28.0 mpg US
33.6 mpg UK

Detailed score breakdown

Detailed score breakdown
VehiclePorsche718 Boxster (982)S 2.5Porsche911 Cabriolet (991)Carrera 3.4
Power
350 hp
261 kW
350 hp
261 kW
Torque
420 Nm
310 lb-ft
390 Nm
288 lb-ft
Acceleration
4.6 s
4.6 s
Top speed
285 km/h
177 mph
284 km/h
176 mph
Lightness
1,355 kg
2,987 lb
1,490 kg
3,285 lb
Fuel consumption
9.6 L/100 km
24.5 mpg US
29.4 mpg UK
8.4 L/100 km
28.0 mpg US
33.6 mpg UK
Practicality
Doors/seats
2 doors
2 seats
Trunk
125 L
4.4 cu ft
Length
4,379 mm
172.4 in
Height
1,280 mm
50.4 in
Doors/seats
2 doors
4 seats
Trunk
290 L
10.2 cu ft
Length
4,491 mm
176.8 in
Height
1,299 mm
51.1 in
Range score
667 km
414 mi
762 km
473 mi
CO2 score
218 g/km
195 g/km
Trunk score
125 L
4.4 cu ft
290 L
10.2 cu ft
Power-to-weight score
258 hp/t
193 kW/t
3.9 kg/hp
235 hp/t
175 kW/t
4.3 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 718 Boxster (982) S 2.5Porsche 911 Cabriolet (991) Carrera 3.4
Consumption9.6 L/100 km24.5 mpg US29.4 mpg UK8.4 L/100 km28 mpg US33.6 mpg UK
Cost / 100 km16.80 LC100 km14.70 LC100 km
Cost / 100 mi27.04 LC100 mi23.66 LC100 mi
Annual fuel used1,440 L380 US gal317 UK gal1,260 L333 US gal277 UK gal
Annual fuel cost2,520 LC/year2,205 LC/year

Head-to-head comparisons

Porsche 718 Boxster (982) S 2.5

  • Has 30 Nm more
  • Is 135 kg lighter
  • Has 1 km/h (1 mph) higher top speed
  • Has 23 hp/t better power-to-weight

Pros

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

Cons

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

Porsche 911 Cabriolet (991) Carrera 3.4

  • Uses 1.2 L/100 km less fuel
  • Has 95 km (59 mi) more estimated range
  • Has 165 L more trunk volume
  • Emits 23 g/km less CO2

Pros

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

Cons

  • Heaviest
  • Lowest top speed

Choose cars to compare

Brand
Model
Generation
Engine or modification
Porsche 718 Boxster (982) S 2.5
Porsche 911 Cabriolet (991) Carrera 3.4
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2 vehicles selected

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