Car comparison

BMW M8 Convertible (F91) 4.4 V8vsMercedes-Benz S-class Cabriolet (A217) AMG S 65 V12

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

New comparison

BMW M8 Convertible (F91)

4.4 V8

600 hp4395 ccGasolineAWDAutomaticTurbochargedCabriolet / convertible2019-2022
VS

Mercedes-Benz S-class Cabriolet (A217)

AMG S 65 V12

630 hp5980 ccGasolineRWDAutomaticTwin-turboCabriolet / convertible2015-2017

Comparison overview

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

Best choices

BMW M8 Convertible (F91) 4.4 V8

  • Quickest 0-100 km/h
    3.4 s
  • Fastest top speed
    260 km/h
    162 mph Unrestricted
    250 km/h
    155 mph Restricted
  • Lightest
    2,010 kg
    4,431 lb
  • Best power-to-weight
    299 hp/t
    223 kW/t
    3.4 kg/hp
  • Lowest combined fuel consumption
    10.8 L/100 km
    21.8 mpg US
    26.2 mpg UK
  • Lowest city consumption
    15.2 L/100 km
    15.5 mpg US
    18.6 mpg UK
  • Lowest highway consumption
    8.2 L/100 km
    28.7 mpg US
    34.4 mpg UK
  • Lowest CO2 emissions
    246 g/km
  • Largest trunk
    350 L
  • Best overall score
    75/100
  • Best performance score
    87/100
  • Best economy score
    78/100
  • Best practicality score
    48/100

Specification comparison

Specification comparison
ModelBMWM8 Convertible (F91)4.4 V8Mercedes-BenzS-class Cabriolet (A217)AMG S 65 V12
Power
600hp447kW
630hp470kW
Torque
750Nm553lb-ft
1,000Nm738lb-ft
Curb weight
2,010kg4,431lb
2,180kg4,806lb
Gross weight
2,440kg5,379lb
2,625kg5,787lb
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Calculated
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Calculated
To 99% top speed
39.2s99% target: 257 km/h / 160 mph
Calculated
52.7s99% target: 257 km/h / 160 mph
Calculated
0-100 km/h
3.4s
4.1s
0-200 km/h
11.3s
14.4s
Calculated
0-60 mph
3.2s
Calculated
3.9s
Calculated
Fuel consumption
10.8L/100 km21.8mpg US26.2mpg UK
12L/100 km19.6mpg US23.5mpg UK
Fuel consumption city
15.2L/100 km15.5mpg US18.6mpg UK
17.1L/100 km13.8mpg US16.5mpg UK
Fuel consumption highway
8.2L/100 km28.7mpg US34.4mpg UK
8.9L/100 km26.4mpg US31.7mpg UK
Quarter mile
11.3s
Calculated
12.2s
Calculated
Power-to-weight
299hp/t223kW/t135hp/1000 lb
Calculated
289hp/t216kW/t131hp/1000 lb
Calculated
Torque-to-weight
373Nm/t250lb-ft/ton
Calculated
459Nm/t307lb-ft/ton
Calculated
Estimated range
630km391mi
Calculated
667km414mi
Calculated
Displacement
4,395cc268cu in
5,980cc365cu in
Length
4,867mm192in
5,027mm198in
Width
1,907mm75in
1,899mm75in
Height
1,353mm53in
1,417mm56in
Wheelbase
2,827mm111in
2,945mm116in
Front track
1,627mm64in
1,625mm64in
Rear track
1,632mm64in
1,649mm65in
Trunk volume-
350L
Max trunk volume
350L
-
Doors
2
2
Seats
4
4
Fuel tank
68L
80L
CO2 emissions
246g/km
272g/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.

BMW M8 Convertible (F91) 4.4 V8Mercedes-Benz S-class Cabriolet (A217) AMG S 65 V12PowerTorque
  • BMW M8 Convertible (F91) 4.4 V8: Power / Torque
  • Mercedes-Benz S-class Cabriolet (A217) AMG S 65 V12: Power / Torque
Dyno simulation data table
VehiclePeak power RPMPeak torque RPMMax engine speed
BMWM8 Convertible (F91)4.4 V86,000 rpm1,800-5,600 rpm6,250 rpm
Mercedes-BenzS-class Cabriolet (A217)AMG S 65 V124,800-5,400 rpm2,300-4,300 rpm5,650 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
MetricBMWM8 Convertible (F91)4.4 V8Mercedes-BenzS-class Cabriolet (A217)AMG S 65 V12
Acceleration checkpoints
0-60 mph
0-97 km/h
3.2 s
3.9 s
0-100 km/h
0-62 mph
3.4 s
4.1 s
0-200 km/h
0-124 mph
11.3 s
14.4 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Likely limited
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Likely limited
Drag race simulation
60 ft
18 m
1.9 s
2.0 s
330 ft
101 m
4.9 s
5.3 s
1/8 mile
201 m
7.4 s
7.9 s
1000 ft
305 m
9.5 s
10.2 s
1/4 mile
402 m
11.3 s
12.2 s
Trap speed
1/4 mile
402 m
200 km/h
124 mph
187 km/h
116 mph

Power comparison

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

Chart data table
VehicleValue
BMWM8 Convertible (F91)4.4 V8
600 hp
447 kW
Mercedes-BenzS-class Cabriolet (A217)AMG S 65 V12
630 hp
470 kW

Mercedes-Benz S-class Cabriolet (A217) AMG S 65 V12 has 30 hp more than BMW M8 Convertible (F91) 4.4 V8.

The biggest power difference is between BMW M8 Convertible (F91) 4.4 V8 and Mercedes-Benz S-class Cabriolet (A217) AMG S 65 V12: 30 hp (22 kW).

Torque comparison

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

Chart data table
VehicleValue
BMWM8 Convertible (F91)4.4 V8
750 Nm
553 lb-ft
Mercedes-BenzS-class Cabriolet (A217)AMG S 65 V12
1,000 Nm
738 lb-ft

Curb weight comparison

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

Chart data table
VehicleValue
BMWM8 Convertible (F91)4.4 V8
2,010 kg
4,431 lb
Mercedes-BenzS-class Cabriolet (A217)AMG S 65 V12
2,180 kg
4,806 lb

Top speed without limiter comparison

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

Chart data table
VehicleValue
BMWM8 Convertible (F91)4.4 V8
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Mercedes-BenzS-class Cabriolet (A217)AMG S 65 V12
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
BMWM8 Convertible (F91)4.4 V83.4 s
Mercedes-BenzS-class Cabriolet (A217)AMG S 65 V124.1 s

Although Mercedes-Benz S-class Cabriolet (A217) AMG S 65 V12 has more power, BMW M8 Convertible (F91) 4.4 V8 is quicker from 0-100 km/h.

The biggest 0-100 km/h difference is between BMW M8 Convertible (F91) 4.4 V8 and Mercedes-Benz S-class Cabriolet (A217) AMG S 65 V12: 0.7 s.

Fuel consumption comparison

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

Chart data table
VehicleValue
BMWM8 Convertible (F91)4.4 V8
10.8 L/100 km
21.8 mpg US
26.2 mpg UK
Mercedes-BenzS-class Cabriolet (A217)AMG S 65 V12
12.0 L/100 km
19.6 mpg US
23.5 mpg UK

The biggest fuel consumption difference is between BMW M8 Convertible (F91) 4.4 V8 and Mercedes-Benz S-class Cabriolet (A217) AMG S 65 V12: 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
BMWM8 Convertible (F91)4.4 V8
299 hp/t
223 kW/t
3.3 kg/hp
Mercedes-BenzS-class Cabriolet (A217)AMG S 65 V12
289 hp/t
216 kW/t
3.5 kg/hp

Estimated range comparison

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

Chart data table
VehicleValue
BMWM8 Convertible (F91)4.4 V8
630 km
391 mi
Mercedes-BenzS-class Cabriolet (A217)AMG S 65 V12
667 km
414 mi

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
VehiclePowerAccelerationTop speed
BMWM8 Convertible (F91)4.4 V8
600 hp
447 kW
3.4 s
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Mercedes-BenzS-class Cabriolet (A217)AMG S 65 V12
630 hp
470 kW
4.1 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
BMWM8 Convertible (F91)4.4 V8
Power
600 hp
447 kW
0-100 km/h3.4 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
Mercedes-BenzS-class Cabriolet (A217)AMG S 65 V12
Power
630 hp
470 kW
0-100 km/h4.1 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
5,027 mm
197.9 in
Height
1,417 mm
55.8 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
BMWM8 Convertible (F91)4.4 V8
Power
600 hp
447 kW
0-100 km/h3.4 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
10.8 L/100 km
21.8 mpg US
26.2 mpg UK
Mercedes-BenzS-class Cabriolet (A217)AMG S 65 V12
Power
630 hp
470 kW
0-100 km/h4.1 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
12.0 L/100 km
19.6 mpg US
23.5 mpg UK

BMW M8 Convertible (F91) 4.4 V8 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
BMWM8 Convertible (F91)4.4 V8
10.8 L/100 km
21.8 mpg US
26.2 mpg UK
3.4 s
Mercedes-BenzS-class Cabriolet (A217)AMG S 65 V12
12.0 L/100 km
19.6 mpg US
23.5 mpg UK
4.1 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
BMWM8 Convertible (F91)4.4 V8
299 hp/t
223 kW/t
3.4 kg/hp
10.8 L/100 km
21.8 mpg US
26.2 mpg UK
Mercedes-BenzS-class Cabriolet (A217)AMG S 65 V12
289 hp/t
216 kW/t
3.5 kg/hp
12.0 L/100 km
19.6 mpg US
23.5 mpg UK

Detailed score breakdown

Detailed score breakdown
VehicleBMWM8 Convertible (F91)4.4 V8Mercedes-BenzS-class Cabriolet (A217)AMG S 65 V12
Power
600 hp
447 kW
630 hp
470 kW
Torque
750 Nm
553 lb-ft
1,000 Nm
738 lb-ft
Acceleration
3.4 s
4.1 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Lightness
2,010 kg
4,431 lb
2,180 kg
4,806 lb
Fuel consumption
10.8 L/100 km
21.8 mpg US
26.2 mpg UK
12.0 L/100 km
19.6 mpg US
23.5 mpg UK
Practicality
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
Doors/seats
2 doors
4 seats
Trunk
350 L
12.4 cu ft
Length
5,027 mm
197.9 in
Height
1,417 mm
55.8 in
Range score
630 km
391 mi
667 km
414 mi
CO2 score
246 g/km
272 g/km
Trunk score
350 L
12.4 cu ft
350 L
12.4 cu ft
Power-to-weight score
299 hp/t
223 kW/t
3.4 kg/hp
289 hp/t
216 kW/t
3.5 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
VehicleBMW M8 Convertible (F91) 4.4 V8Mercedes-Benz S-class Cabriolet (A217) AMG S 65 V12
Consumption10.8 L/100 km21.8 mpg US26.2 mpg UK12 L/100 km19.6 mpg US23.5 mpg UK
Cost / 100 km18.90 LC100 km21.00 LC100 km
Cost / 100 mi30.42 LC100 mi33.80 LC100 mi
Annual fuel used1,620 L428 US gal356 UK gal1,800 L476 US gal396 UK gal
Annual fuel cost2,835 LC/year3,150 LC/year

Head-to-head comparisons

BMW M8 Convertible (F91) 4.4 V8

  • Is 170 kg lighter
  • Is 0.7 s quicker from 0-100 km/h
  • Uses 1.2 L/100 km less fuel
  • Has 10 hp/t better power-to-weight
  • Emits 26 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
  • Largest trunk

Cons

  • Lowest power

Choose cars to compare

Brand
Model
Generation
Engine or modification
BMW M8 Convertible (F91) 4.4 V8
Mercedes-Benz S-class Cabriolet (A217) AMG S 65 V12
Compare selected cars
2 vehicles selected

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