Car comparison

Porsche 911 Cabriolet (991) Turbo 3.8vsBentley Continental GTC II V8 S 4.0

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

New comparison

Porsche 911 Cabriolet (991)

Turbo 3.8

520 hp3800 ccGasolineAWDDual-clutchTwin-turboCabriolet / convertible2013-2016
VS

Bentley Continental GTC II

V8 S 4.0

521 hp3993 ccGasolineAWDAutomaticTwin-turboCabriolet / convertible2014-2015

Comparison overview

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

Best choices

Porsche 911 Cabriolet (991) Turbo 3.8

  • Quickest 0-100 km/h
    3.5 s
  • Fastest top speed
    315 km/h
    196 mph
  • Lightest
    1,665 kg
    3,671 lb
  • Best power-to-weight
    312 hp/t
    233 kW/t
    3.2 kg/hp
  • Lowest combined fuel consumption
    9.9 L/100 km
    23.8 mpg US
    28.5 mpg UK
  • Lowest city consumption
    13.4 L/100 km
    17.6 mpg US
    21.1 mpg UK
  • Lowest highway consumption
    7.8 L/100 km
    30.2 mpg US
    36.2 mpg UK
  • Lowest CO2 emissions
    231 g/km
  • Best overall score
    76/100
  • Best performance score
    91/100
  • Best economy score
    80/100

Specification comparison

Specification comparison
ModelPorsche911 Cabriolet (991)Turbo 3.8BentleyContinental GTC IIV8 S 4.0
Power
520hp388kW
521hp389kW
Torque
660Nm487lb-ft
680Nm502lb-ft
Curb weight
1,665kg3,671lb
2,470kg5,445lb
Gross weight
2,045kg4,508lb
2,900kg6,393lb
Top speed
315 km/h
196 mph
308 km/h
191 mph
To 99% top speed
51.1s99% target: 312 km/h / 194 mph
Calculated
92.0s99% target: 305 km/h / 189 mph
Calculated
0-100 km/h
3.5s
4.7s
0-200 km/h
10.0s
Calculated
15.4s
Calculated
0-60 mph
3.3s
Calculated
4.5s
Calculated
Fuel consumption
9.9L/100 km23.8mpg US28.5mpg UK
10.9L/100 km21.6mpg US25.9mpg UK
Fuel consumption city
13.4L/100 km17.6mpg US21.1mpg UK
15.8L/100 km14.9mpg US17.9mpg UK
Fuel consumption highway
7.8L/100 km30.2mpg US36.2mpg UK
8L/100 km29.4mpg US35.3mpg UK
Quarter mile
11.2s
Calculated
12.8s
Calculated
Power-to-weight
312hp/t233kW/t142hp/1000 lb
Calculated
211hp/t157kW/t96hp/1000 lb
Calculated
Torque-to-weight
396Nm/t265lb-ft/ton
Calculated
275Nm/t184lb-ft/ton
Calculated
Estimated range
687km427mi
Calculated
826km513mi
Calculated
Displacement
3,800cc232cu in
3,993cc244cu in
Length
4,506mm177in
4,806mm189in
Width
1,880mm74in
1,944mm77in
Height
1,292mm51in
1,403mm55in
Wheelbase
2,450mm96in
2,746mm108in
Front track
1,541mm61in
1,664mm66in
Rear track
1,590mm63in
1,655mm65in
Trunk volume
275L
-
Doors
2
2
Seats
4
4
Fuel tank
68L
90L
CO2 emissions
231g/km
254g/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) Turbo 3.8Bentley Continental GTC II V8 S 4.0PowerTorque
  • Porsche 911 Cabriolet (991) Turbo 3.8: Power / Torque
  • Bentley Continental GTC II V8 S 4.0: Power / Torque
Dyno simulation data table
VehiclePeak power RPMPeak torque RPMMax engine speed
Porsche911 Cabriolet (991)Turbo 3.86,000-6,500 rpm1,950-5,000 rpm6,750 rpm
BentleyContinental GTC IIV8 S 4.06,000 rpm1,700 rpm6,250 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
MetricPorsche911 Cabriolet (991)Turbo 3.8BentleyContinental GTC IIV8 S 4.0
Acceleration checkpoints
0-60 mph
0-97 km/h
3.3 s
4.5 s
0-100 km/h
0-62 mph
3.5 s
4.7 s
0-200 km/h
0-124 mph
10.0 s
15.4 s
Top speed
315 km/h
196 mph
308 km/h
191 mph
Drag race simulation
60 ft
18 m
1.9 s
2.1 s
330 ft
101 m
5.0 s
5.5 s
1/8 mile
201 m
7.4 s
8.4 s
1000 ft
305 m
9.4 s
10.8 s
1/4 mile
402 m
11.2 s
12.8 s
Trap speed
1/4 mile
402 m
212 km/h
132 mph
182 km/h
113 mph

Power comparison

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

Chart data table
VehicleValue
Porsche911 Cabriolet (991)Turbo 3.8
520 hp
388 kW
BentleyContinental GTC IIV8 S 4.0
521 hp
389 kW

Bentley Continental GTC II V8 S 4.0 has 1 hp more than Porsche 911 Cabriolet (991) Turbo 3.8.

The biggest power difference is between Porsche 911 Cabriolet (991) Turbo 3.8 and Bentley Continental GTC II V8 S 4.0: 1 hp (1 kW).

Torque comparison

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

Chart data table
VehicleValue
Porsche911 Cabriolet (991)Turbo 3.8
660 Nm
487 lb-ft
BentleyContinental GTC IIV8 S 4.0
680 Nm
502 lb-ft

Curb weight comparison

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

Chart data table
VehicleValue
Porsche911 Cabriolet (991)Turbo 3.8
1,665 kg
3,671 lb
BentleyContinental GTC IIV8 S 4.0
2,470 kg
5,445 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)Turbo 3.8
315 km/h
196 mph
BentleyContinental GTC IIV8 S 4.0
308 km/h
191 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)Turbo 3.83.5 s
BentleyContinental GTC IIV8 S 4.04.7 s

Although Bentley Continental GTC II V8 S 4.0 has more power, Porsche 911 Cabriolet (991) Turbo 3.8 is quicker from 0-100 km/h.

The biggest 0-100 km/h difference is between Porsche 911 Cabriolet (991) Turbo 3.8 and Bentley Continental GTC II V8 S 4.0: 1.2 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 Cabriolet (991)Turbo 3.8
9.9 L/100 km
23.8 mpg US
28.5 mpg UK
BentleyContinental GTC IIV8 S 4.0
10.9 L/100 km
21.6 mpg US
25.9 mpg UK

The biggest fuel consumption difference is between Porsche 911 Cabriolet (991) Turbo 3.8 and Bentley Continental GTC II V8 S 4.0: 1.0 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 Cabriolet (991)Turbo 3.8
312 hp/t
233 kW/t
3.2 kg/hp
BentleyContinental GTC IIV8 S 4.0
211 hp/t
157 kW/t
4.7 kg/hp

Estimated range comparison

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

Chart data table
VehicleValue
Porsche911 Cabriolet (991)Turbo 3.8
687 km
427 mi
BentleyContinental GTC IIV8 S 4.0
826 km
513 mi

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
VehiclePowerAccelerationTop speed
Porsche911 Cabriolet (991)Turbo 3.8
520 hp
388 kW
3.5 s
315 km/h
196 mph
BentleyContinental GTC IIV8 S 4.0
521 hp
389 kW
4.7 s
308 km/h
191 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)Turbo 3.8
Power
520 hp
388 kW
0-100 km/h3.5 s
Top speed
315 km/h
196 mph
Doors/seats
2 doors
4 seats
Trunk
275 L
9.7 cu ft
Length
4,506 mm
177.4 in
Height
1,292 mm
50.9 in
BentleyContinental GTC IIV8 S 4.0
Power
521 hp
389 kW
0-100 km/h4.7 s
Top speed
308 km/h
191 mph
Doors/seats
2 doors
4 seats
Trunk-
Length
4,806 mm
189.2 in
Height
1,403 mm
55.2 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)Turbo 3.8
Power
520 hp
388 kW
0-100 km/h3.5 s
Top speed
315 km/h
196 mph
9.9 L/100 km
23.8 mpg US
28.5 mpg UK
BentleyContinental GTC IIV8 S 4.0
Power
521 hp
389 kW
0-100 km/h4.7 s
Top speed
308 km/h
191 mph
10.9 L/100 km
21.6 mpg US
25.9 mpg UK

Porsche 911 Cabriolet (991) Turbo 3.8 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)Turbo 3.8
9.9 L/100 km
23.8 mpg US
28.5 mpg UK
3.5 s
BentleyContinental GTC IIV8 S 4.0
10.9 L/100 km
21.6 mpg US
25.9 mpg UK
4.7 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)Turbo 3.8
312 hp/t
233 kW/t
3.2 kg/hp
9.9 L/100 km
23.8 mpg US
28.5 mpg UK
BentleyContinental GTC IIV8 S 4.0
211 hp/t
157 kW/t
4.7 kg/hp
10.9 L/100 km
21.6 mpg US
25.9 mpg UK

Detailed score breakdown

Detailed score breakdown
VehiclePorsche911 Cabriolet (991)Turbo 3.8BentleyContinental GTC IIV8 S 4.0
Power
520 hp
388 kW
521 hp
389 kW
Torque
660 Nm
487 lb-ft
680 Nm
502 lb-ft
Acceleration
3.5 s
4.7 s
Top speed
315 km/h
196 mph
308 km/h
191 mph
Lightness
1,665 kg
3,671 lb
2,470 kg
5,445 lb
Fuel consumption
9.9 L/100 km
23.8 mpg US
28.5 mpg UK
10.9 L/100 km
21.6 mpg US
25.9 mpg UK
Practicality
Doors/seats
2 doors
4 seats
Trunk
275 L
9.7 cu ft
Length
4,506 mm
177.4 in
Height
1,292 mm
50.9 in
Doors/seats
2 doors
4 seats
Trunk-
Length
4,806 mm
189.2 in
Height
1,403 mm
55.2 in
Range score
687 km
427 mi
826 km
513 mi
CO2 score
231 g/km
254 g/km
Trunk score
275 L
9.7 cu ft
-
Power-to-weight score
312 hp/t
233 kW/t
3.2 kg/hp
211 hp/t
157 kW/t
4.7 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) Turbo 3.8Bentley Continental GTC II V8 S 4.0
Consumption9.9 L/100 km23.8 mpg US28.5 mpg UK10.9 L/100 km21.6 mpg US25.9 mpg UK
Cost / 100 km17.33 LC100 km19.08 LC100 km
Cost / 100 mi27.88 LC100 mi30.70 LC100 mi
Annual fuel used1,485 L392 US gal327 UK gal1,635 L432 US gal360 UK gal
Annual fuel cost2,599 LC/year2,861 LC/year

Head-to-head comparisons

Porsche 911 Cabriolet (991) Turbo 3.8

  • Is 805 kg lighter
  • Is 1.2 s quicker from 0-100 km/h
  • Has 7 km/h (4 mph) higher top speed
  • Uses 1.0 L/100 km less fuel
  • Has 101 hp/t better power-to-weight
  • Emits 23 g/km less CO2

Pros

  • Quickest 0-100 km/h in this comparison
  • Highest top speed
  • Lightest
  • Lowest combined fuel consumption
  • Best power-to-weight ratio

Cons

  • Lowest power

Bentley Continental GTC II V8 S 4.0

  • Has 1 hp more
  • Has 20 Nm more
  • Has 139 km (86 mi) more estimated range

Pros

  • Most powerful
  • Highest torque
  • Best estimated range

Cons

  • Slowest 0-100 km/h
  • Highest combined fuel consumption
  • Heaviest
  • Lowest top speed
  • Highest CO2 emissions

Choose cars to compare

Brand
Model
Generation
Engine or modification
Porsche 911 Cabriolet (991) Turbo 3.8
Bentley Continental GTC II V8 S 4.0
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