Car comparison

BMW M8 Convertible (F91) 4.4 V8vsMercedes-Benz S-class Cabriolet (A217) · Facelift 2017 AMG S 63

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) · Facelift 2017

AMG S 63

612 hp3982 ccGasolineAWDAutomaticTwin-turboCabriolet / convertible2017-2020

Comparison overview

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

Best choices

Mercedes-Benz S-class Cabriolet (A217) Facelift 2017 AMG S 63

  • Most powerful
    612 hp
    456 kW
  • Highest torque
    900 Nm
    664 lb-ft
  • Lowest combined fuel consumption
    10.1 L/100 km
    23.3 mpg US
    28.0 mpg UK
  • Lowest city consumption
    13.6 L/100 km
    17.3 mpg US
    20.8 mpg UK
  • Lowest highway consumption
    8.0 L/100 km
    29.4 mpg US
    35.3 mpg UK
  • Lowest CO2 emissions
    229 g/km
  • Best estimated range
    792 km
    492 mi
  • Best economy score
    80/100

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
  • Best overall score
    75/100
  • Best performance score
    87/100
  • Best practicality score
    48/100

Specification comparison

Specification comparison
ModelBMWM8 Convertible (F91)4.4 V8Mercedes-BenzS-class Cabriolet (A217)Facelift 2017AMG S 63
Power
600hp447kW
612hp456kW
Torque
750Nm553lb-ft
900Nm664lb-ft
Curb weight
2,010kg4,431lb
2,110kg4,652lb
Gross weight
2,440kg5,379lb
2,635kg5,809lb
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
43.6s99% target: 257 km/h / 160 mph
Calculated
0-100 km/h
3.4s
3.5s
0-200 km/h
11.3s
12.1s
Calculated
0-60 mph
3.2s
Calculated
3.3s
Calculated
Fuel consumption
10.8L/100 km21.8mpg US26.2mpg UK
10.1L/100 km23.3mpg US28.0mpg UK
Fuel consumption city
15.2L/100 km15.5mpg US18.6mpg UK
13.6L/100 km17.3mpg US20.8mpg UK
Fuel consumption highway
8.2L/100 km28.7mpg US34.4mpg UK
8L/100 km29.4mpg US35.3mpg UK
Quarter mile
11.3s
Calculated
11.5s
Calculated
Power-to-weight
299hp/t223kW/t135hp/1000 lb
Calculated
290hp/t216kW/t132hp/1000 lb
Calculated
Torque-to-weight
373Nm/t250lb-ft/ton
Calculated
427Nm/t285lb-ft/ton
Calculated
Estimated range
630km391mi
Calculated
792km492mi
Calculated
Displacement
4,395cc268cu in
3,982cc243cu in
Length
4,867mm192in
5,051mm199in
Width
1,907mm75in
-
Height
1,353mm53in
-
Wheelbase
2,827mm111in
2,945mm116in
Front track
1,627mm64in
1,660mm65in
Rear track
1,632mm64in
1,645mm65in
Max trunk volume
350L
-
Doors
2
2
Seats
4
4
Fuel tank
68L
80L
CO2 emissions
246g/km
229g/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) Facelift 2017 AMG S 63PowerTorque
  • BMW M8 Convertible (F91) 4.4 V8: Power / Torque
  • Mercedes-Benz S-class Cabriolet (A217) Facelift 2017 AMG S 63: 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)Facelift 2017AMG S 635,500-6,000 rpm2,750-4,500 rpm6,250 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)Facelift 2017AMG S 63
Acceleration checkpoints
0-60 mph
0-97 km/h
3.2 s
3.3 s
0-100 km/h
0-62 mph
3.4 s
3.5 s
0-200 km/h
0-124 mph
11.3 s
12.1 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
1.9 s
330 ft
101 m
4.9 s
4.9 s
1/8 mile
201 m
7.4 s
7.5 s
1000 ft
305 m
9.5 s
9.6 s
1/4 mile
402 m
11.3 s
11.5 s
Trap speed
1/4 mile
402 m
200 km/h
124 mph
196 km/h
122 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)Facelift 2017AMG S 63
612 hp
456 kW

Mercedes-Benz S-class Cabriolet (A217) Facelift 2017 AMG S 63 has 12 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) Facelift 2017 AMG S 63: 12 hp (9 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)Facelift 2017AMG S 63
900 Nm
664 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)Facelift 2017AMG S 63
2,110 kg
4,652 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)Facelift 2017AMG S 63
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)Facelift 2017AMG S 633.5 s

Although Mercedes-Benz S-class Cabriolet (A217) Facelift 2017 AMG S 63 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) Facelift 2017 AMG S 63: 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
BMWM8 Convertible (F91)4.4 V8
10.8 L/100 km
21.8 mpg US
26.2 mpg UK
Mercedes-BenzS-class Cabriolet (A217)Facelift 2017AMG S 63
10.1 L/100 km
23.3 mpg US
28.0 mpg UK

The biggest fuel consumption difference is between Mercedes-Benz S-class Cabriolet (A217) Facelift 2017 AMG S 63 and BMW M8 Convertible (F91) 4.4 V8: 0.7 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)Facelift 2017AMG S 63
290 hp/t
216 kW/t
3.4 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)Facelift 2017AMG S 63
792 km
492 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)Facelift 2017AMG S 63
612 hp
456 kW
3.5 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)Facelift 2017AMG S 63
Power
612 hp
456 kW
0-100 km/h3.5 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Doors/seats
2 doors
4 seats
Trunk-
Length
5,051 mm
198.9 in
Height-

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)Facelift 2017AMG S 63
Power
612 hp
456 kW
0-100 km/h3.5 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
10.1 L/100 km
23.3 mpg US
28.0 mpg UK

Mercedes-Benz S-class Cabriolet (A217) Facelift 2017 AMG S 63 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)Facelift 2017AMG S 63
10.1 L/100 km
23.3 mpg US
28.0 mpg UK
3.5 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)Facelift 2017AMG S 63
290 hp/t
216 kW/t
3.4 kg/hp
10.1 L/100 km
23.3 mpg US
28.0 mpg UK

Detailed score breakdown

Detailed score breakdown
VehicleBMWM8 Convertible (F91)4.4 V8Mercedes-BenzS-class Cabriolet (A217)Facelift 2017AMG S 63
Power
600 hp
447 kW
612 hp
456 kW
Torque
750 Nm
553 lb-ft
900 Nm
664 lb-ft
Acceleration
3.4 s
3.5 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
2,110 kg
4,652 lb
Fuel consumption
10.8 L/100 km
21.8 mpg US
26.2 mpg UK
10.1 L/100 km
23.3 mpg US
28.0 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-
Length
5,051 mm
198.9 in
Height-
Range score
630 km
391 mi
792 km
492 mi
CO2 score
246 g/km
229 g/km
Trunk score
350 L
12.4 cu ft
-
Power-to-weight score
299 hp/t
223 kW/t
3.4 kg/hp
290 hp/t
216 kW/t
3.4 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) Facelift 2017 AMG S 63
Consumption10.8 L/100 km21.8 mpg US26.2 mpg UK10.1 L/100 km23.3 mpg US28 mpg UK
Cost / 100 km18.90 LC100 km17.68 LC100 km
Cost / 100 mi30.42 LC100 mi28.45 LC100 mi
Annual fuel used1,620 L428 US gal356 UK gal1,515 L400 US gal333 UK gal
Annual fuel cost2,835 LC/year2,651 LC/year

Head-to-head comparisons

BMW M8 Convertible (F91) 4.4 V8

  • Is 100 kg lighter
  • Is 0.1 s quicker from 0-100 km/h
  • Has 8 hp/t better power-to-weight

Pros

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

Cons

  • Lowest power
  • Highest combined fuel consumption
  • Highest CO2 emissions

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 63
Compare selected cars
2 vehicles selected

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