Car comparison

BMW M4 Convertible (F83) Competition 3.0vsBMW 6 Series Convertible (F12) 650i

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

New comparison

BMW M4 Convertible (F83)

Competition 3.0

450 hp2979 ccGasolineRWDManualTurbochargedCabriolet / convertible2016-2020

BMW 6 Series Convertible (F12)

650i

450 hp4395 ccGasolineRWDAutomaticTurbochargedCabriolet / convertible2012-2015

Comparison overview

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

BMW M4 Convertible (F83) Competition 3.0

Quickest 0-100 km/h
4.5 s
Fastest top speed
260 km/h
162 mph Unrestricted
250 km/h
155 mph Restricted
Most powerful
450 hp
336 kW
Lightest
1,765 kg
3,891 lb
Best power-to-weight
255 hp/t
190 kW/t
3.9 kg/hp
Lowest combined fuel consumption
9.1 L/100 km
25.8 mpg US
31.0 mpg UK
Lowest city consumption
12.4 L/100 km
19.0 mpg US
22.8 mpg UK
Lowest CO2 emissions
213 g/km
Best economy score
82/100

BMW 6 Series Convertible (F12) 650i

Highest torque
650 Nm
479 lb-ft
Lowest highway consumption
7.1 L/100 km
33.1 mpg US
39.8 mpg UK
Best estimated range
761 km
473 mi
Largest trunk
300 L
Best overall score
68/100
Best performance score
79/100
Best practicality score
45/100

Specification comparison

Specification comparison
Model	BMWM4 Convertible (F83)Competition 3.0	BMW6 Series Convertible (F12)650i
Power	450hp336kW	450hp336kW
Torque	550Nm406lb-ft	650Nm479lb-ft
Curb weight	1,765kg3,891lb	1,940kg4,277lb
Gross weight	2,250kg4,960lb	2,420kg5,335lb
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	59.6s99% target: 257 km/h / 160 mph Calculated	62.2s99% target: 257 km/h / 160 mph Calculated
0-100 km/h	4.5s	4.6s
0-200 km/h	16.0s Calculated	16.6s Calculated
0-60 mph	4.3s Calculated	4.4s Calculated
Fuel consumption	9.1L/100 km25.8mpg US31.0mpg UK	9.2L/100 km25.6mpg US30.7mpg UK
Fuel consumption city	12.4L/100 km19mpg US22.8mpg UK	12.8L/100 km18.4mpg US22.1mpg UK
Fuel consumption highway	7.2L/100 km32.7mpg US39.2mpg UK	7.1L/100 km33.1mpg US39.8mpg UK
Quarter mile	12.6s Calculated	12.7s Calculated
Power-to-weight	255hp/t190kW/t116hp/1000 lb Calculated	232hp/t173kW/t105hp/1000 lb Calculated
Torque-to-weight	312Nm/t209lb-ft/ton Calculated	335Nm/t224lb-ft/ton Calculated
Estimated range	659km410mi Calculated	761km473mi Calculated
Displacement	2,979cc182cu in	4,395cc268cu in
Length	4,671mm184in	4,894mm193in
Width	1,870mm74in	1,894mm75in
Height	1,392mm55in	1,365mm54in
Wheelbase	2,812mm111in	2,855mm112in
Front track	1,579mm62in	1,600mm63in
Rear track	1,604mm63in	1,665mm66in
Ground clearance	119mm5in	123mm5in
Trunk volume	220L	300L
Max trunk volume	370L	350L
Doors	2	2
Seats	4	4
Fuel tank	60L	70L
CO2 emissions	213g/km	214g/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 M4 Convertible (F83) Competition 3.0BMW 6 Series Convertible (F12) 650iPowerTorque

Dyno simulation data table
Vehicle	Peak power RPM	Peak torque RPM	Max engine speed
BMWM4 Convertible (F83)Competition 3.0	7,000 rpm	1,850-5,500 rpm	7,250 rpm
BMW6 Series Convertible (F12)650i	5,500 rpm	2,000-4,500 rpm	5,750 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
Metric	BMWM4 Convertible (F83)Competition 3.0	BMW6 Series Convertible (F12)650i
	Acceleration checkpoints
0-60 mph 0-97 km/h	4.3 s	4.4 s
0-100 km/h 0-62 mph	4.5 s	4.6 s
0-200 km/h 0-124 mph	16.0 s	16.6 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	2.1 s	2.1 s
330 ft 101 m	5.5 s	5.5 s
1/8 mile 201 m	8.2 s	8.3 s
1000 ft 305 m	10.6 s	10.7 s
1/4 mile 402 m	12.6 s	12.7 s
Trap speed 1/4 mile 402 m	181 km/h 113 mph	179 km/h 111 mph

Power comparison

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

Chart data table
Vehicle	Value
BMWM4 Convertible (F83)Competition 3.0	450 hp 336 kW
BMW6 Series Convertible (F12)650i	450 hp 336 kW

Torque comparison

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

Chart data table
Vehicle	Value
BMWM4 Convertible (F83)Competition 3.0	550 Nm 406 lb-ft
BMW6 Series Convertible (F12)650i	650 Nm 479 lb-ft

Curb weight comparison

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

Chart data table
Vehicle	Value
BMWM4 Convertible (F83)Competition 3.0	1,765 kg 3,891 lb
BMW6 Series Convertible (F12)650i	1,940 kg 4,277 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
BMWM4 Convertible (F83)Competition 3.0	Unrestricted 260 km/h162 mph Restricted 250 km/h155 mph
BMW6 Series Convertible (F12)650i	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
BMWM4 Convertible (F83)Competition 3.0	4.5 s
BMW6 Series Convertible (F12)650i	4.6 s

The biggest 0-100 km/h difference is between BMW M4 Convertible (F83) Competition 3.0 and BMW 6 Series Convertible (F12) 650i: 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
Vehicle	Value
BMWM4 Convertible (F83)Competition 3.0	9.1 L/100 km 25.8 mpg US 31.0 mpg UK
BMW6 Series Convertible (F12)650i	9.2 L/100 km 25.6 mpg US 30.7 mpg UK

Power-to-weight comparison

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

Chart data table
Vehicle	Value
BMWM4 Convertible (F83)Competition 3.0	255 hp/t 190 kW/t 3.9 kg/hp
BMW6 Series Convertible (F12)650i	232 hp/t 173 kW/t 4.3 kg/hp

Estimated range comparison

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

Chart data table
Vehicle	Value
BMWM4 Convertible (F83)Competition 3.0	659 km 410 mi
BMW6 Series Convertible (F12)650i	761 km 473 mi

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
Vehicle	Power	Acceleration	Top speed
BMWM4 Convertible (F83)Competition 3.0	450 hp 336 kW	4.5 s	Unrestricted 260 km/h162 mph Restricted 250 km/h155 mph
BMW6 Series Convertible (F12)650i	450 hp 336 kW	4.6 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

BMWM4 Convertible (F83)Competition 3.0

Power	450 hp 336 kW
0-100 km/h	4.5 s
Top speed Unrestricted 260 km/h162 mph Restricted 250 km/h155 mph

Doors/seats	2 doors 4 seats
Trunk	220 L 7.8 cu ft
Length	4,671 mm 183.9 in
Height	1,392 mm 54.8 in

BMW6 Series Convertible (F12)650i

Power	450 hp 336 kW
0-100 km/h	4.6 s
Top speed Unrestricted 260 km/h162 mph Restricted 250 km/h155 mph

Doors/seats	2 doors 4 seats
Trunk	300 L 10.6 cu ft
Length	4,894 mm 192.7 in
Height	1,365 mm 53.7 in

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

BMWM4 Convertible (F83)Competition 3.0

Power	450 hp 336 kW
0-100 km/h	4.5 s
Top speed Unrestricted 260 km/h162 mph Restricted 250 km/h155 mph

9.1 L/100 km

25.8 mpg US

31.0 mpg UK

BMW6 Series Convertible (F12)650i

Power	450 hp 336 kW
0-100 km/h	4.6 s
Top speed Unrestricted 260 km/h162 mph Restricted 250 km/h155 mph

9.2 L/100 km

25.6 mpg US

30.7 mpg UK

BMW 6 Series Convertible (F12) 650i 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
BMWM4 Convertible (F83)Competition 3.0	9.1 L/100 km 25.8 mpg US 31.0 mpg UK	4.5 s
BMW6 Series Convertible (F12)650i	9.2 L/100 km 25.6 mpg US 30.7 mpg UK	4.6 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
BMWM4 Convertible (F83)Competition 3.0	255 hp/t 190 kW/t 3.9 kg/hp	9.1 L/100 km 25.8 mpg US 31.0 mpg UK
BMW6 Series Convertible (F12)650i	232 hp/t 173 kW/t 4.3 kg/hp	9.2 L/100 km 25.6 mpg US 30.7 mpg UK

Detailed score breakdown

Vehicle

BMWM4 Convertible (F83)Competition 3.0

BMW6 Series Convertible (F12)650i

Power

450 hp

336 kW

450 hp

336 kW

Torque

550 Nm

406 lb-ft

650 Nm

479 lb-ft

Acceleration

4.5 s

4.6 s

Top speed

Unrestricted

260 km/h162 mph

Restricted

250 km/h155 mph

Unrestricted

260 km/h162 mph

Restricted

250 km/h155 mph

Lightness

1,765 kg

3,891 lb

1,940 kg

4,277 lb

Fuel consumption

9.1 L/100 km

25.8 mpg US

31.0 mpg UK

9.2 L/100 km

25.6 mpg US

30.7 mpg UK

Practicality

Doors/seats	2 doors 4 seats
Trunk	220 L 7.8 cu ft
Length	4,671 mm 183.9 in
Height	1,392 mm 54.8 in

Doors/seats	2 doors 4 seats
Trunk	300 L 10.6 cu ft
Length	4,894 mm 192.7 in
Height	1,365 mm 53.7 in

Range score

659 km

410 mi

761 km

473 mi

CO2 score

213 g/km

214 g/km

Trunk score

220 L

7.8 cu ft

300 L

10.6 cu ft

Power-to-weight score

255 hp/t

190 kW/t

3.9 kg/hp

232 hp/t

173 kW/t

4.3 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 M4 Convertible (F83) Competition 3.0	BMW 6 Series Convertible (F12) 650i
Consumption	9.1 L/100 km25.8 mpg US31 mpg UK	9.2 L/100 km25.6 mpg US30.7 mpg UK
Cost / 100 km	15.92 LC100 km	16.10 LC100 km
Cost / 100 mi	25.63 LC100 mi	25.91 LC100 mi
Annual fuel used	1,365 L361 US gal300 UK gal	1,380 L365 US gal304 UK gal
Annual fuel cost	2,389 LC/year	2,415 LC/year