Car comparison

Porsche 911 (991 II) GT2 RS 3.8vsPorsche 911 Cabriolet (992) Turbo 3.8

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

New comparison

Porsche 911 (991 II)

GT2 RS 3.8

700 hp3800 ccGasolineRWDDual-clutchTwin-turboCoupe2017-2019
VS

Porsche 911 Cabriolet (992)

Turbo 3.8

580 hp3745 ccGasolineAWDDual-clutchTwin-turboCabriolet / convertible2020-2024

Comparison overview

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

Best choices

Porsche 911 (991 II) GT2 RS 3.8

  • Quickest 0-100 km/h
    2.8 s
  • Fastest top speed
    340 km/h
    211 mph
  • Most powerful
    700 hp
    522 kW
  • Highest torque
    750 Nm
    553 lb-ft
  • Lightest
    1,470 kg
    3,241 lb
  • Best power-to-weight
    476 hp/t
    355 kW/t
    2.1 kg/hp
  • Lowest highway consumption
    8.2 L/100 km
    28.7 mpg US
    34.4 mpg UK
  • Best performance score
    95/100

Porsche 911 Cabriolet (992) Turbo 3.8

  • Lowest combined fuel consumption
    11.3 L/100 km
    20.8 mpg US
    25.0 mpg UK
  • Lowest city consumption
    15.2 L/100 km
    15.5 mpg US
    18.6 mpg UK
  • Best estimated range
    593 km
    368 mi
  • Largest trunk
    163 L
  • Best overall score
    76/100
  • Best economy score
    77/100
  • Best practicality score
    39/100

Specification comparison

Specification comparison
ModelPorsche911 (991 II)GT2 RS 3.8Porsche911 Cabriolet (992)Turbo 3.8
Power
700hp522kW
580hp433kW
Torque
750Nm553lb-ft
750Nm553lb-ft
Curb weight
1,470kg3,241lb
1,710kg3,770lb
Gross weight
1,830kg4,034lb
2,100kg4,630lb
Top speed
340 km/h
211 mph
Unrestricted
330 km/h205 mph
Restricted
320 km/h199 mph
Calculated
To 99% top speed
56.2s99% target: 337 km/h / 209 mph
Calculated
82.8s99% target: 327 km/h / 203 mph
Calculated
0-100 km/h
2.8s
2.9s
0-200 km/h
8.3s
10.1s
0-60 mph
2.7s
Calculated
2.7s
Calculated
Fuel consumption
11.8L/100 km19.9mpg US23.9mpg UK
11.3L/100 km20.8mpg US25.0mpg UK
Fuel consumption city
18.1L/100 km13mpg US15.6mpg UK
15.2L/100 km15.5mpg US18.6mpg UK
Fuel consumption highway
8.2L/100 km28.7mpg US34.4mpg UK
8.9L/100 km26.4mpg US31.7mpg UK
Quarter mile
10.3s
Calculated
10.8s
Calculated
Power-to-weight
476hp/t355kW/t216hp/1000 lb
Calculated
339hp/t253kW/t154hp/1000 lb
Calculated
Torque-to-weight
510Nm/t341lb-ft/ton
Calculated
439Nm/t293lb-ft/ton
Calculated
Estimated range
542km337mi
Calculated
593km368mi
Calculated
Displacement
3,800cc232cu in
3,745cc229cu in
Length
4,549mm179in
4,535mm179in
Width
1,880mm74in
1,900mm75in
Height
1,297mm51in
1,302mm51in
Wheelbase
2,453mm97in
2,450mm96in
Front track
1,588mm63in
1,583mm62in
Rear track
1,557mm61in
1,600mm63in
Trunk volume
115L
163L
Doors
2
2
Seats
2
4
Fuel tank
64L
67L
CO2 emissions
269g/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) GT2 RS 3.8Porsche 911 Cabriolet (992) Turbo 3.8PowerTorque
  • Porsche 911 (991 II) GT2 RS 3.8: Power / Torque
  • Porsche 911 Cabriolet (992) Turbo 3.8: Power / Torque
Dyno simulation data table
VehiclePeak power RPMPeak torque RPMMax engine speed
Porsche911 (991 II)GT2 RS 3.87,000 rpm2,500-4,500 rpm7,250 rpm
Porsche911 Cabriolet (992)Turbo 3.86,500 rpm2,250-4,500 rpm7,200 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
MetricPorsche911 (991 II)GT2 RS 3.8Porsche911 Cabriolet (992)Turbo 3.8
Acceleration checkpoints
0-60 mph
0-97 km/h
2.7 s
2.7 s
0-100 km/h
0-62 mph
2.8 s
2.9 s
0-200 km/h
0-124 mph
8.3 s
10.1 s
0-200 mph
0-322 km/h
33.3 s
62.1 s
Top speed
340 km/h
211 mph
Unrestricted
330 km/h205 mph
Restricted
320 km/h199 mph
Likely limited
Drag race simulation
60 ft
18 m
1.7 s
1.6 s
330 ft
101 m
4.5 s
4.5 s
1/8 mile
201 m
6.8 s
6.9 s
1000 ft
305 m
8.7 s
9.0 s
1/4 mile
402 m
10.3 s
10.8 s
Trap speed
1/4 mile
402 m
224 km/h
139 mph
206 km/h
128 mph

Power comparison

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

Chart data table
VehicleValue
Porsche911 (991 II)GT2 RS 3.8
700 hp
522 kW
Porsche911 Cabriolet (992)Turbo 3.8
580 hp
433 kW

Porsche 911 (991 II) GT2 RS 3.8 has 120 hp more than Porsche 911 Cabriolet (992) Turbo 3.8.

The biggest power difference is between Porsche 911 Cabriolet (992) Turbo 3.8 and Porsche 911 (991 II) GT2 RS 3.8: 120 hp (89 kW).

Torque comparison

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

Chart data table
VehicleValue
Porsche911 (991 II)GT2 RS 3.8
750 Nm
553 lb-ft
Porsche911 Cabriolet (992)Turbo 3.8
750 Nm
553 lb-ft

Curb weight comparison

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

Chart data table
VehicleValue
Porsche911 (991 II)GT2 RS 3.8
1,470 kg
3,241 lb
Porsche911 Cabriolet (992)Turbo 3.8
1,710 kg
3,770 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)GT2 RS 3.8
340 km/h
211 mph
Porsche911 Cabriolet (992)Turbo 3.8
Unrestricted
330 km/h205 mph
Restricted
320 km/h199 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)GT2 RS 3.82.8 s
Porsche911 Cabriolet (992)Turbo 3.82.9 s

The biggest 0-100 km/h difference is between Porsche 911 (991 II) GT2 RS 3.8 and Porsche 911 Cabriolet (992) Turbo 3.8: 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 (991 II)GT2 RS 3.8
11.8 L/100 km
19.9 mpg US
23.9 mpg UK
Porsche911 Cabriolet (992)Turbo 3.8
11.3 L/100 km
20.8 mpg US
25.0 mpg UK

The biggest fuel consumption difference is between Porsche 911 Cabriolet (992) Turbo 3.8 and Porsche 911 (991 II) GT2 RS 3.8: 0.5 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 II)GT2 RS 3.8
476 hp/t
355 kW/t
2.1 kg/hp
Porsche911 Cabriolet (992)Turbo 3.8
339 hp/t
253 kW/t
2.9 kg/hp

Estimated range comparison

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

Chart data table
VehicleValue
Porsche911 (991 II)GT2 RS 3.8
542 km
337 mi
Porsche911 Cabriolet (992)Turbo 3.8
593 km
368 mi

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
VehiclePowerAccelerationTop speed
Porsche911 (991 II)GT2 RS 3.8
700 hp
522 kW
2.8 s
340 km/h
211 mph
Porsche911 Cabriolet (992)Turbo 3.8
580 hp
433 kW
2.9 s
Unrestricted
330 km/h205 mph
Restricted
320 km/h199 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)GT2 RS 3.8
Power
700 hp
522 kW
0-100 km/h2.8 s
Top speed
340 km/h
211 mph
Doors/seats
2 doors
2 seats
Trunk
115 L
4.1 cu ft
Length
4,549 mm
179.1 in
Height
1,297 mm
51.1 in
Porsche911 Cabriolet (992)Turbo 3.8
Power
580 hp
433 kW
0-100 km/h2.9 s
Top speed
Unrestricted
330 km/h205 mph
Restricted
320 km/h199 mph
Doors/seats
2 doors
4 seats
Trunk
163 L
5.8 cu ft
Length
4,535 mm
178.5 in
Height
1,302 mm
51.3 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)GT2 RS 3.8
Power
700 hp
522 kW
0-100 km/h2.8 s
Top speed
340 km/h
211 mph
11.8 L/100 km
19.9 mpg US
23.9 mpg UK
Porsche911 Cabriolet (992)Turbo 3.8
Power
580 hp
433 kW
0-100 km/h2.9 s
Top speed
Unrestricted
330 km/h205 mph
Restricted
320 km/h199 mph
11.3 L/100 km
20.8 mpg US
25.0 mpg UK

Porsche 911 Cabriolet (992) 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 (991 II)GT2 RS 3.8
11.8 L/100 km
19.9 mpg US
23.9 mpg UK
2.8 s
Porsche911 Cabriolet (992)Turbo 3.8
11.3 L/100 km
20.8 mpg US
25.0 mpg UK
2.9 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 (991 II)GT2 RS 3.8
476 hp/t
355 kW/t
2.1 kg/hp
11.8 L/100 km
19.9 mpg US
23.9 mpg UK
Porsche911 Cabriolet (992)Turbo 3.8
339 hp/t
253 kW/t
2.9 kg/hp
11.3 L/100 km
20.8 mpg US
25.0 mpg UK

Detailed score breakdown

Detailed score breakdown
VehiclePorsche911 (991 II)GT2 RS 3.8Porsche911 Cabriolet (992)Turbo 3.8
Power
700 hp
522 kW
580 hp
433 kW
Torque
750 Nm
553 lb-ft
750 Nm
553 lb-ft
Acceleration
2.8 s
2.9 s
Top speed
340 km/h
211 mph
Unrestricted
330 km/h205 mph
Restricted
320 km/h199 mph
Lightness
1,470 kg
3,241 lb
1,710 kg
3,770 lb
Fuel consumption
11.8 L/100 km
19.9 mpg US
23.9 mpg UK
11.3 L/100 km
20.8 mpg US
25.0 mpg UK
Practicality
Doors/seats
2 doors
2 seats
Trunk
115 L
4.1 cu ft
Length
4,549 mm
179.1 in
Height
1,297 mm
51.1 in
Doors/seats
2 doors
4 seats
Trunk
163 L
5.8 cu ft
Length
4,535 mm
178.5 in
Height
1,302 mm
51.3 in
Range score
542 km
337 mi
593 km
368 mi
CO2 score
269 g/km
-
Trunk score
115 L
4.1 cu ft
163 L
5.8 cu ft
Power-to-weight score
476 hp/t
355 kW/t
2.1 kg/hp
339 hp/t
253 kW/t
2.9 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 (991 II) GT2 RS 3.8Porsche 911 Cabriolet (992) Turbo 3.8
Consumption11.8 L/100 km19.9 mpg US23.9 mpg UK11.3 L/100 km20.8 mpg US25 mpg UK
Cost / 100 km20.65 LC100 km19.78 LC100 km
Cost / 100 mi33.23 LC100 mi31.82 LC100 mi
Annual fuel used1,770 L468 US gal389 UK gal1,695 L448 US gal373 UK gal
Annual fuel cost3,098 LC/year2,966 LC/year

Head-to-head comparisons

Porsche 911 (991 II) GT2 RS 3.8

  • Has 120 hp more
  • Is 240 kg lighter
  • Is 0.1 s quicker from 0-100 km/h
  • Has 10 km/h (6 mph) higher top speed
  • Has 137 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

Porsche 911 Cabriolet (992) Turbo 3.8

  • Uses 0.5 L/100 km less fuel
  • Has 51 km (31 mi) more estimated range
  • Has 48 L more trunk volume

Pros

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

Cons

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

Choose cars to compare

Brand
Model
Generation
Engine or modification
Porsche 911 (991 II) GT2 RS 3.8
Porsche 911 Cabriolet (992) Turbo 3.8
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