Car comparison

BMW M8 Convertible (F91) · Facelift 2022 Competition 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) · Facelift 2022

Competition 4.4 V8

625 hp4395 ccGasolineAWDAutomaticTwin-turboCabriolet / convertible2022-present

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.

BMW M8 Convertible (F91) Facelift 2022 Competition 4.4 V8

Quickest 0-100 km/h
3.3 s
Fastest top speed
260 km/h
162 mph Unrestricted
250 km/h
155 mph Restricted
Most powerful
625 hp
466 kW
Lightest
2,025 kg
4,464 lb
Best power-to-weight
309 hp/t
230 kW/t
3.2 kg/hp
Best overall score
74/100
Best performance score
87/100
Best practicality score
47/100

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

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
Best estimated range
792 km
492 mi
Best economy score
80/100

Specification comparison

Specification comparison
Model	BMWM8 Convertible (F91)Facelift 2022Competition 4.4 V8	Mercedes-BenzS-class Cabriolet (A217)Facelift 2017AMG S 63
Power	625hp466kW	612hp456kW
Torque	750Nm553lb-ft	900Nm664lb-ft
Curb weight	2,025kg4,464lb	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	39.7s99% target: 257 km/h / 160 mph Calculated	43.6s99% target: 257 km/h / 160 mph Calculated
0-100 km/h	3.3s	3.5s
0-200 km/h	11.2s Calculated	12.1s Calculated
0-60 mph	3.1s Calculated	3.3s Calculated
Fuel consumption	11.4L/100 km20.6mpg US24.8mpg UK	10.1L/100 km23.3mpg US28.0mpg UK
Fuel consumption city	16.9L/100 km13.9mpg US16.7mpg 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	11.2s Calculated	11.5s Calculated
Power-to-weight	309hp/t230kW/t140hp/1000 lb Calculated	290hp/t216kW/t132hp/1000 lb Calculated
Torque-to-weight	370Nm/t248lb-ft/ton Calculated	427Nm/t285lb-ft/ton Calculated
Estimated range	596km371mi 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
Trunk volume	350L	-
Doors	2	2
Seats	4	4
Fuel tank	68L	80L
CO2 emissions	-	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) Facelift 2022 Competition 4.4 V8Mercedes-Benz S-class Cabriolet (A217) Facelift 2017 AMG S 63PowerTorque

Dyno simulation data table
Vehicle	Peak power RPM	Peak torque RPM	Max engine speed
BMWM8 Convertible (F91)Facelift 2022Competition 4.4 V8	6,000 rpm	1,800-5,860 rpm	6,250 rpm
Mercedes-BenzS-class Cabriolet (A217)Facelift 2017AMG S 63	5,500-6,000 rpm	2,750-4,500 rpm	6,250 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
Metric	BMWM8 Convertible (F91)Facelift 2022Competition 4.4 V8	Mercedes-BenzS-class Cabriolet (A217)Facelift 2017AMG S 63
	Acceleration checkpoints
0-60 mph 0-97 km/h	3.1 s	3.3 s
0-100 km/h 0-62 mph	3.3 s	3.5 s
0-200 km/h 0-124 mph	11.2 s	12.1 s
Top speed	Unrestricted 260 km/h162 mph Restricted 250 km/h155 mph Limited	Unrestricted 260 km/h162 mph Restricted 250 km/h155 mph Likely limited
	Drag race simulation
60 ft 18 m	1.8 s	1.9 s
330 ft 101 m	4.8 s	4.9 s
1/8 mile 201 m	7.3 s	7.5 s
1000 ft 305 m	9.4 s	9.6 s
1/4 mile 402 m	11.2 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
Vehicle	Value
BMWM8 Convertible (F91)Facelift 2022Competition 4.4 V8	625 hp 466 kW
Mercedes-BenzS-class Cabriolet (A217)Facelift 2017AMG S 63	612 hp 456 kW

BMW M8 Convertible (F91) Facelift 2022 Competition 4.4 V8 has 13 hp more than Mercedes-Benz S-class Cabriolet (A217) Facelift 2017 AMG S 63.

The biggest power difference is between Mercedes-Benz S-class Cabriolet (A217) Facelift 2017 AMG S 63 and BMW M8 Convertible (F91) Facelift 2022 Competition 4.4 V8: 13 hp (10 kW).

Torque comparison

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

Chart data table
Vehicle	Value
BMWM8 Convertible (F91)Facelift 2022Competition 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
Vehicle	Value
BMWM8 Convertible (F91)Facelift 2022Competition 4.4 V8	2,025 kg 4,464 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
Vehicle	Value
BMWM8 Convertible (F91)Facelift 2022Competition 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
Vehicle	Value
BMWM8 Convertible (F91)Facelift 2022Competition 4.4 V8	3.3 s
Mercedes-BenzS-class Cabriolet (A217)Facelift 2017AMG S 63	3.5 s

The biggest 0-100 km/h difference is between BMW M8 Convertible (F91) Facelift 2022 Competition 4.4 V8 and Mercedes-Benz S-class Cabriolet (A217) Facelift 2017 AMG S 63: 0.2 s.

Fuel consumption comparison

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

Chart data table
Vehicle	Value
BMWM8 Convertible (F91)Facelift 2022Competition 4.4 V8	11.4 L/100 km 20.6 mpg US 24.8 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) Facelift 2022 Competition 4.4 V8: 1.3 L/100 km.

Power-to-weight comparison

Bar comparison chart for Power-to-weight. Higher is better · hp/t / kW/t

Chart data table
Vehicle	Value
BMWM8 Convertible (F91)Facelift 2022Competition 4.4 V8	309 hp/t 230 kW/t 3.2 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
Vehicle	Value
BMWM8 Convertible (F91)Facelift 2022Competition 4.4 V8	596 km 371 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
Vehicle	Power	Acceleration	Top speed
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
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.

Vehicle

Performance score

Practicality score

BMWM8 Convertible (F91)Facelift 2022Competition 4.4 V8

Power	625 hp 466 kW
0-100 km/h	3.3 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

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

Power	612 hp 456 kW
0-100 km/h	3.5 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.

Vehicle

Performance score

Fuel economy score

BMWM8 Convertible (F91)Facelift 2022Competition 4.4 V8

Power	625 hp 466 kW
0-100 km/h	3.3 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

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

Power	612 hp 456 kW
0-100 km/h	3.5 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
Vehicle	Fuel consumption, L/100 km	0-100 km/h, 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
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
Vehicle	Power-to-weight, hp/t	Fuel consumption, L/100 km
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
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

Vehicle

BMWM8 Convertible (F91)Facelift 2022Competition 4.4 V8

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

Power

625 hp

466 kW

612 hp

456 kW

Torque

750 Nm

553 lb-ft

900 Nm

664 lb-ft

Acceleration

3.3 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

2,025 kg

4,464 lb

2,110 kg

4,652 lb

Fuel consumption

11.4 L/100 km

20.6 mpg US

24.8 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

596 km

371 mi

792 km

492 mi

CO2 score

229 g/km

Trunk score

350 L

12.4 cu ft

Power-to-weight score

309 hp/t

230 kW/t

3.2 kg/hp

290 hp/t

216 kW/t

3.4 kg/hp

Overall

Fixed score

Fuel cost and annual usage

Estimate running costs from combined consumption, your annual distance, and the fuel price in your local currency.

Average annual distanceDistance unitFuel price in your local currencyPrice unit

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
Vehicle	BMW M8 Convertible (F91) Facelift 2022 Competition 4.4 V8	Mercedes-Benz S-class Cabriolet (A217) Facelift 2017 AMG S 63
Consumption	11.4 L/100 km20.6 mpg US24.8 mpg UK	10.1 L/100 km23.3 mpg US28 mpg UK
Cost / 100 km	19.95 LC100 km	17.68 LC100 km
Cost / 100 mi	32.11 LC100 mi	28.45 LC100 mi
Annual fuel used	1,710 L452 US gal376 UK gal	1,515 L400 US gal333 UK gal
Annual fuel cost	2,993 LC/year	2,651 LC/year