Car comparison

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

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

New comparison

Porsche 911 Cabriolet (991)

Carrera 3.4

350 hp3436 ccGasolineRWDManualNaturally aspiratedCabriolet / convertible2011-2015
VS

Porsche 718 Boxster (982)

S 2.5

350 hp2497 ccGasolineRWDManualTurbochargedCabriolet / convertible2018-2020

Comparison overview

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

Best choices

Porsche 911 Cabriolet (991) Carrera 3.4

  • Fastest top speed
    286 km/h
    178 mph
  • Most powerful
    350 hp
    261 kW
  • Lowest combined fuel consumption
    9.2 L/100 km
    25.6 mpg US
    30.7 mpg UK
  • Lowest city consumption
    12.7 L/100 km
    18.5 mpg US
    22.2 mpg UK
  • Best estimated range
    696 km
    432 mi
  • Largest trunk
    290 L
  • Best overall score
    63/100
  • Best economy score
    82/100
  • Best practicality score
    44/100

Porsche 718 Boxster (982) S 2.5

  • Quickest 0-100 km/h
    4.9 s
  • 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
  • Lowest highway consumption
    7.1 L/100 km
    33.1 mpg US
    39.8 mpg UK
  • Lowest CO2 emissions
    210 g/km
  • Best performance score
    73/100

Specification comparison

Specification comparison
ModelPorsche911 Cabriolet (991)Carrera 3.4Porsche718 Boxster (982)S 2.5
Power
350hp261kW
350hp261kW
Torque
390Nm288lb-ft
420Nm310lb-ft
Curb weight
1,470kg3,241lb
1,355kg2,987lb
Gross weight
1,850kg4,079lb
1,665kg3,671lb
Top speed
286 km/h
178 mph
285 km/h
177 mph
To 99% top speed
68.9s99% target: 283 km/h / 176 mph
Calculated
65.6s99% target: 282 km/h / 175 mph
Calculated
0-100 km/h
5.0s
4.9s
0-200 km/h
15.6s
Calculated
15.2s
Calculated
0-60 mph
4.8s
Calculated
4.7s
Calculated
Fuel consumption
9.2L/100 km25.6mpg US30.7mpg UK
9.2L/100 km25.6mpg US30.7mpg UK
Fuel consumption city
12.7L/100 km18.5mpg US22.2mpg UK
12.7L/100 km18.5mpg US22.2mpg UK
Fuel consumption highway
7.2L/100 km32.7mpg US39.2mpg UK
7.1L/100 km33.1mpg US39.8mpg UK
Quarter mile
13.0s
Calculated
12.9s
Calculated
Power-to-weight
238hp/t178kW/t108hp/1000 lb
Calculated
258hp/t193kW/t117hp/1000 lb
Calculated
Torque-to-weight
265Nm/t178lb-ft/ton
Calculated
310Nm/t207lb-ft/ton
Calculated
Estimated range
696km432mi
Calculated
587km365mi
Calculated
Displacement
3,436cc210cu in
2,497cc152cu in
Length
4,491mm177in
4,379mm172in
Width
1,808mm71in
1,801mm71in
Height
1,299mm51in
1,280mm50in
Wheelbase
2,450mm96in
2,475mm97in
Front track
1,532mm60in
1,515mm60in
Rear track
1,518mm60in
1,539mm61in
Trunk volume
290L
-
Max trunk volume-
150L
Doors
2
2
Seats
4
2
Fuel tank
64L
54L
CO2 emissions
216g/km
210g/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 Cabriolet (991) Carrera 3.4Porsche 718 Boxster (982) S 2.5PowerTorque
  • Porsche 911 Cabriolet (991) Carrera 3.4: Power / Torque
  • Porsche 718 Boxster (982) S 2.5: Power / Torque
Dyno simulation data table
VehiclePeak power RPMPeak torque RPMMax engine speed
Porsche911 Cabriolet (991)Carrera 3.47,400 rpm5,600 rpm7,650 rpm
Porsche718 Boxster (982)S 2.56,500 rpm2,100-4,500 rpm6,750 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
MetricPorsche911 Cabriolet (991)Carrera 3.4Porsche718 Boxster (982)S 2.5
Acceleration checkpoints
0-60 mph
0-97 km/h
4.8 s
4.7 s
0-100 km/h
0-62 mph
5.0 s
4.9 s
0-200 km/h
0-124 mph
15.6 s
15.2 s
Top speed
286 km/h
178 mph
285 km/h
177 mph
Drag race simulation
60 ft
18 m
2.2 s
2.2 s
330 ft
101 m
5.8 s
5.7 s
1/8 mile
201 m
8.6 s
8.5 s
1000 ft
305 m
11.0 s
10.9 s
1/4 mile
402 m
13.0 s
12.9 s
Trap speed
1/4 mile
402 m
183 km/h
114 mph
185 km/h
115 mph

Power comparison

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

Chart data table
VehicleValue
Porsche911 Cabriolet (991)Carrera 3.4
350 hp
261 kW
Porsche718 Boxster (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 Cabriolet (991)Carrera 3.4
390 Nm
288 lb-ft
Porsche718 Boxster (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 Cabriolet (991)Carrera 3.4
1,470 kg
3,241 lb
Porsche718 Boxster (982)S 2.5
1,355 kg
2,987 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 Cabriolet (991)Carrera 3.4
286 km/h
178 mph
Porsche718 Boxster (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 Cabriolet (991)Carrera 3.45.0 s
Porsche718 Boxster (982)S 2.54.9 s

The biggest 0-100 km/h difference is between Porsche 718 Boxster (982) S 2.5 and Porsche 911 Cabriolet (991) Carrera 3.4: 0.1 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 Cabriolet (991)Carrera 3.4
9.2 L/100 km
25.6 mpg US
30.7 mpg UK
Porsche718 Boxster (982)S 2.5
9.2 L/100 km
25.6 mpg US
30.7 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 Cabriolet (991)Carrera 3.4
238 hp/t
178 kW/t
4.2 kg/hp
Porsche718 Boxster (982)S 2.5
258 hp/t
193 kW/t
3.9 kg/hp

Estimated range comparison

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

Chart data table
VehicleValue
Porsche911 Cabriolet (991)Carrera 3.4
696 km
432 mi
Porsche718 Boxster (982)S 2.5
587 km
365 mi

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
VehiclePowerAccelerationTop speed
Porsche911 Cabriolet (991)Carrera 3.4
350 hp
261 kW
5.0 s
286 km/h
178 mph
Porsche718 Boxster (982)S 2.5
350 hp
261 kW
4.9 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 Cabriolet (991)Carrera 3.4
Power
350 hp
261 kW
0-100 km/h5.0 s
Top speed
286 km/h
178 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
Porsche718 Boxster (982)S 2.5
Power
350 hp
261 kW
0-100 km/h4.9 s
Top speed
285 km/h
177 mph
Doors/seats
2 doors
2 seats
Trunk
150 L
5.3 cu ft
Length
4,379 mm
172.4 in
Height
1,280 mm
50.4 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 Cabriolet (991)Carrera 3.4
Power
350 hp
261 kW
0-100 km/h5.0 s
Top speed
286 km/h
178 mph
9.2 L/100 km
25.6 mpg US
30.7 mpg UK
Porsche718 Boxster (982)S 2.5
Power
350 hp
261 kW
0-100 km/h4.9 s
Top speed
285 km/h
177 mph
9.2 L/100 km
25.6 mpg US
30.7 mpg UK

Porsche 718 Boxster (982) S 2.5 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 Cabriolet (991)Carrera 3.4
9.2 L/100 km
25.6 mpg US
30.7 mpg UK
5.0 s
Porsche718 Boxster (982)S 2.5
9.2 L/100 km
25.6 mpg US
30.7 mpg UK
4.9 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 Cabriolet (991)Carrera 3.4
238 hp/t
178 kW/t
4.2 kg/hp
9.2 L/100 km
25.6 mpg US
30.7 mpg UK
Porsche718 Boxster (982)S 2.5
258 hp/t
193 kW/t
3.9 kg/hp
9.2 L/100 km
25.6 mpg US
30.7 mpg UK

Detailed score breakdown

Detailed score breakdown
VehiclePorsche911 Cabriolet (991)Carrera 3.4Porsche718 Boxster (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
5.0 s
4.9 s
Top speed
286 km/h
178 mph
285 km/h
177 mph
Lightness
1,470 kg
3,241 lb
1,355 kg
2,987 lb
Fuel consumption
9.2 L/100 km
25.6 mpg US
30.7 mpg UK
9.2 L/100 km
25.6 mpg US
30.7 mpg UK
Practicality
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
Doors/seats
2 doors
2 seats
Trunk
150 L
5.3 cu ft
Length
4,379 mm
172.4 in
Height
1,280 mm
50.4 in
Range score
696 km
432 mi
587 km
365 mi
CO2 score
216 g/km
210 g/km
Trunk score
290 L
10.2 cu ft
150 L
5.3 cu ft
Power-to-weight score
238 hp/t
178 kW/t
4.2 kg/hp
258 hp/t
193 kW/t
3.9 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 Cabriolet (991) Carrera 3.4Porsche 718 Boxster (982) S 2.5
Consumption9.2 L/100 km25.6 mpg US30.7 mpg UK9.2 L/100 km25.6 mpg US30.7 mpg UK
Cost / 100 km16.10 LC100 km16.10 LC100 km
Cost / 100 mi25.91 LC100 mi25.91 LC100 mi
Annual fuel used1,380 L365 US gal304 UK gal1,380 L365 US gal304 UK gal
Annual fuel cost2,415 LC/year2,415 LC/year

Head-to-head comparisons

Porsche 911 Cabriolet (991) Carrera 3.4

  • Has 1 km/h (1 mph) higher top speed
  • Has 109 km (68 mi) more estimated range
  • Has 140 L more trunk volume

Pros

  • Highest top speed
  • Most powerful
  • Lowest combined fuel consumption
  • Best estimated range
  • Largest trunk

Cons

  • Slowest 0-100 km/h
  • Heaviest
  • Highest CO2 emissions

Porsche 718 Boxster (982) S 2.5

  • Has 30 Nm more
  • Is 115 kg lighter
  • Is 0.1 s quicker from 0-100 km/h
  • Has 20 hp/t better power-to-weight
  • Emits 6 g/km less CO2

Pros

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

Cons

  • Lowest top speed
  • Smallest trunk

Choose cars to compare

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