Car comparison

Porsche 911 Cabriolet (992) Turbo 3.8vsBMW M8 Convertible (F91) · Facelift 2022 Competition 4.4 V8

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

New comparison

Porsche 911 Cabriolet (992)

Turbo 3.8

580 hp3745 ccGasolineAWDDual-clutchTwin-turboCabriolet / convertible2020-2024
VS

BMW M8 Convertible (F91) · Facelift 2022

Competition 4.4 V8

625 hp4395 ccGasolineAWDAutomaticTwin-turboCabriolet / convertible2022-present

Comparison overview

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

Best choices

Porsche 911 Cabriolet (992) Turbo 3.8

  • Quickest 0-100 km/h
    2.9 s
  • Fastest top speed
    330 km/h
    205 mph Unrestricted
    320 km/h
    199 mph Restricted
  • Highest torque
    750 Nm
    553 lb-ft
  • Lightest
    1,710 kg
    3,770 lb
  • Best power-to-weight
    339 hp/t
    253 kW/t
    2.9 kg/hp
  • 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 overall score
    76/100
  • Best performance score
    94/100
  • Best economy score
    77/100

Specification comparison

Specification comparison
ModelPorsche911 Cabriolet (992)Turbo 3.8BMWM8 Convertible (F91)Facelift 2022Competition 4.4 V8
Power
580hp433kW
625hp466kW
Torque
750Nm553lb-ft
750Nm553lb-ft
Curb weight
1,710kg3,770lb
2,025kg4,464lb
Gross weight
2,100kg4,630lb
2,440kg5,379lb
Top speed
Unrestricted
330 km/h205 mph
Restricted
320 km/h199 mph
Calculated
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Calculated
To 99% top speed
82.8s99% target: 327 km/h / 203 mph
Calculated
39.7s99% target: 257 km/h / 160 mph
Calculated
0-100 km/h
2.9s
3.3s
0-200 km/h
10.1s
11.2s
Calculated
0-60 mph
2.7s
Calculated
3.1s
Calculated
Fuel consumption
11.3L/100 km20.8mpg US25.0mpg UK
11.4L/100 km20.6mpg US24.8mpg UK
Fuel consumption city
15.2L/100 km15.5mpg US18.6mpg UK
16.9L/100 km13.9mpg US16.7mpg UK
Fuel consumption highway
8.9L/100 km26.4mpg US31.7mpg UK
8.2L/100 km28.7mpg US34.4mpg UK
Quarter mile
10.8s
Calculated
11.2s
Calculated
Power-to-weight
339hp/t253kW/t154hp/1000 lb
Calculated
309hp/t230kW/t140hp/1000 lb
Calculated
Torque-to-weight
439Nm/t293lb-ft/ton
Calculated
370Nm/t248lb-ft/ton
Calculated
Estimated range
593km368mi
Calculated
596km371mi
Calculated
Displacement
3,745cc229cu in
4,395cc268cu in
Length
4,535mm179in
4,867mm192in
Width
1,900mm75in
1,907mm75in
Height
1,302mm51in
1,353mm53in
Wheelbase
2,450mm96in
2,827mm111in
Front track
1,583mm62in
1,627mm64in
Rear track
1,600mm63in
1,632mm64in
Trunk volume
163L
350L
Doors
2
2
Seats
4
4
Fuel tank
67L
68L

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 (992) Turbo 3.8BMW M8 Convertible (F91) Facelift 2022 Competition 4.4 V8PowerTorque
  • Porsche 911 Cabriolet (992) Turbo 3.8: Power / Torque
  • BMW M8 Convertible (F91) Facelift 2022 Competition 4.4 V8: Power / Torque
Dyno simulation data table
VehiclePeak power RPMPeak torque RPMMax engine speed
Porsche911 Cabriolet (992)Turbo 3.86,500 rpm2,250-4,500 rpm7,200 rpm
BMWM8 Convertible (F91)Facelift 2022Competition 4.4 V86,000 rpm1,800-5,860 rpm6,250 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
MetricPorsche911 Cabriolet (992)Turbo 3.8BMWM8 Convertible (F91)Facelift 2022Competition 4.4 V8
Acceleration checkpoints
0-60 mph
0-97 km/h
2.7 s
3.1 s
0-100 km/h
0-62 mph
2.9 s
3.3 s
0-200 km/h
0-124 mph
10.1 s
11.2 s
0-200 mph
0-322 km/h
62.1 s
-
Top speed
Unrestricted
330 km/h205 mph
Restricted
320 km/h199 mph
Likely limited
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Limited
Drag race simulation
60 ft
18 m
1.6 s
1.8 s
330 ft
101 m
4.5 s
4.8 s
1/8 mile
201 m
6.9 s
7.3 s
1000 ft
305 m
9.0 s
9.4 s
1/4 mile
402 m
10.8 s
11.2 s
Trap speed
1/4 mile
402 m
206 km/h
128 mph
200 km/h
124 mph

Power comparison

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

Chart data table
VehicleValue
Porsche911 Cabriolet (992)Turbo 3.8
580 hp
433 kW
BMWM8 Convertible (F91)Facelift 2022Competition 4.4 V8
625 hp
466 kW

BMW M8 Convertible (F91) Facelift 2022 Competition 4.4 V8 has 45 hp more than Porsche 911 Cabriolet (992) Turbo 3.8.

The biggest power difference is between Porsche 911 Cabriolet (992) Turbo 3.8 and BMW M8 Convertible (F91) Facelift 2022 Competition 4.4 V8: 45 hp (34 kW).

Torque comparison

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

Chart data table
VehicleValue
Porsche911 Cabriolet (992)Turbo 3.8
750 Nm
553 lb-ft
BMWM8 Convertible (F91)Facelift 2022Competition 4.4 V8
750 Nm
553 lb-ft

Curb weight comparison

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

Chart data table
VehicleValue
Porsche911 Cabriolet (992)Turbo 3.8
1,710 kg
3,770 lb
BMWM8 Convertible (F91)Facelift 2022Competition 4.4 V8
2,025 kg
4,464 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 (992)Turbo 3.8
Unrestricted
330 km/h205 mph
Restricted
320 km/h199 mph
BMWM8 Convertible (F91)Facelift 2022Competition 4.4 V8
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph

0-100 km/h comparison

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

Chart data table
VehicleValue
Porsche911 Cabriolet (992)Turbo 3.82.9 s
BMWM8 Convertible (F91)Facelift 2022Competition 4.4 V83.3 s

Although BMW M8 Convertible (F91) Facelift 2022 Competition 4.4 V8 has more power, Porsche 911 Cabriolet (992) Turbo 3.8 is quicker from 0-100 km/h.

The biggest 0-100 km/h difference is between Porsche 911 Cabriolet (992) Turbo 3.8 and BMW M8 Convertible (F91) Facelift 2022 Competition 4.4 V8: 0.4 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 Cabriolet (992)Turbo 3.8
11.3 L/100 km
20.8 mpg US
25.0 mpg UK
BMWM8 Convertible (F91)Facelift 2022Competition 4.4 V8
11.4 L/100 km
20.6 mpg US
24.8 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 (992)Turbo 3.8
339 hp/t
253 kW/t
2.9 kg/hp
BMWM8 Convertible (F91)Facelift 2022Competition 4.4 V8
309 hp/t
230 kW/t
3.2 kg/hp

Estimated range comparison

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

Chart data table
VehicleValue
Porsche911 Cabriolet (992)Turbo 3.8
593 km
368 mi
BMWM8 Convertible (F91)Facelift 2022Competition 4.4 V8
596 km
371 mi

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
VehiclePowerAccelerationTop speed
Porsche911 Cabriolet (992)Turbo 3.8
580 hp
433 kW
2.9 s
Unrestricted
330 km/h205 mph
Restricted
320 km/h199 mph
BMWM8 Convertible (F91)Facelift 2022Competition 4.4 V8
625 hp
466 kW
3.3 s
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 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 (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
BMWM8 Convertible (F91)Facelift 2022Competition 4.4 V8
Power
625 hp
466 kW
0-100 km/h3.3 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Doors/seats
2 doors
4 seats
Trunk
350 L
12.4 cu ft
Length
4,867 mm
191.6 in
Height
1,353 mm
53.3 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 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
BMWM8 Convertible (F91)Facelift 2022Competition 4.4 V8
Power
625 hp
466 kW
0-100 km/h3.3 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
11.4 L/100 km
20.6 mpg US
24.8 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 Cabriolet (992)Turbo 3.8
11.3 L/100 km
20.8 mpg US
25.0 mpg UK
2.9 s
BMWM8 Convertible (F91)Facelift 2022Competition 4.4 V8
11.4 L/100 km
20.6 mpg US
24.8 mpg UK
3.3 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 (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
BMWM8 Convertible (F91)Facelift 2022Competition 4.4 V8
309 hp/t
230 kW/t
3.2 kg/hp
11.4 L/100 km
20.6 mpg US
24.8 mpg UK

Detailed score breakdown

Detailed score breakdown
VehiclePorsche911 Cabriolet (992)Turbo 3.8BMWM8 Convertible (F91)Facelift 2022Competition 4.4 V8
Power
580 hp
433 kW
625 hp
466 kW
Torque
750 Nm
553 lb-ft
750 Nm
553 lb-ft
Acceleration
2.9 s
3.3 s
Top speed
Unrestricted
330 km/h205 mph
Restricted
320 km/h199 mph
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Lightness
1,710 kg
3,770 lb
2,025 kg
4,464 lb
Fuel consumption
11.3 L/100 km
20.8 mpg US
25.0 mpg UK
11.4 L/100 km
20.6 mpg US
24.8 mpg UK
Practicality
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
Doors/seats
2 doors
4 seats
Trunk
350 L
12.4 cu ft
Length
4,867 mm
191.6 in
Height
1,353 mm
53.3 in
Range score
593 km
368 mi
596 km
371 mi
Trunk score
163 L
5.8 cu ft
350 L
12.4 cu ft
Power-to-weight score
339 hp/t
253 kW/t
2.9 kg/hp
309 hp/t
230 kW/t
3.2 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 (992) Turbo 3.8BMW M8 Convertible (F91) Facelift 2022 Competition 4.4 V8
Consumption11.3 L/100 km20.8 mpg US25 mpg UK11.4 L/100 km20.6 mpg US24.8 mpg UK
Cost / 100 km19.78 LC100 km19.95 LC100 km
Cost / 100 mi31.82 LC100 mi32.11 LC100 mi
Annual fuel used1,695 L448 US gal373 UK gal1,710 L452 US gal376 UK gal
Annual fuel cost2,966 LC/year2,993 LC/year

Head-to-head comparisons

Porsche 911 Cabriolet (992) Turbo 3.8

  • Is 315 kg lighter
  • Is 0.4 s quicker from 0-100 km/h
  • Has 70 km/h (43 mph) higher top speed
  • Uses 0.1 L/100 km less fuel
  • Has 31 hp/t better power-to-weight

Pros

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

Cons

  • Lowest power
  • Smallest trunk

Choose cars to compare

Brand
Model
Generation
Engine or modification
Porsche 911 Cabriolet (992) Turbo 3.8
BMW M8 Convertible (F91) Competition 4.4 V8
Compare selected cars
2 vehicles selected

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