Car comparison

BMW 6 Series Convertible (F12) 650ivsBMW 6 Series (E24) · Facelift 1982 M 635CSi

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

New comparison

BMW 6 Series Convertible (F12)

650i

407 hp4395 ccGasolineRWDAutomaticTurbochargedCabriolet / convertible2011-2012

BMW 6 Series (E24) · Facelift 1982

M 635CSi

286 hp3453 ccGasolineRWDManualNaturally aspiratedCoupe1984-1987

Comparison overview

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

BMW 6 Series Convertible (F12) 650i

Quickest 0-100 km/h
5.0 s
Fastest top speed
260 km/h
162 mph Unrestricted
250 km/h
155 mph Restricted
Most powerful
407 hp
304 kW
Highest torque
600 Nm
443 lb-ft
Best power-to-weight
210 hp/t
156 kW/t
4.8 kg/hp
Lowest combined fuel consumption
10.7 L/100 km
22.0 mpg US
26.4 mpg UK
Lowest city consumption
15.5 L/100 km
15.2 mpg US
18.2 mpg UK
Best estimated range
654 km
407 mi
Best overall score
65/100
Best performance score
74/100
Best economy score
78/100

BMW 6 Series (E24) Facelift 1982 M 635CSi

Lightest
1,500 kg
3,307 lb
Lowest highway consumption
7.8 L/100 km
30.2 mpg US
36.2 mpg UK
Largest trunk
335 L
Best practicality score
49/100

Specification comparison

Specification comparison
Model	BMW6 Series Convertible (F12)650i	BMW6 Series (E24)Facelift 1982M 635CSi
Power	407hp304kW	286hp213kW
Torque	600Nm443lb-ft	340Nm251lb-ft
Curb weight	1,940kg4,277lb	1,500kg3,307lb
Gross weight	2,390kg5,269lb	1,850kg4,079lb
Top speed	Unrestricted 260 km/h162 mph Restricted 250 km/h155 mph Calculated	255 km/h 158 mph
To 99% top speed	70.2s99% target: 257 km/h / 160 mph Calculated	91.2s99% target: 252 km/h / 157 mph Calculated
0-100 km/h	5.0s	6.4s
0-200 km/h	18.3s Calculated	24.6s Calculated
0-60 mph	4.7s Calculated	6.1s Calculated
Fuel consumption	10.7L/100 km22mpg US26.4mpg UK	11.3L/100 km20.8mpg US25.0mpg UK
Fuel consumption city	15.5L/100 km15.2mpg US18.2mpg UK	16.5L/100 km14.3mpg US17.1mpg UK
Fuel consumption highway	7.9L/100 km29.8mpg US35.8mpg UK	7.8L/100 km30.2mpg US36.2mpg UK
Quarter mile	13.2s Calculated	14.5s Calculated
Power-to-weight	210hp/t156kW/t95hp/1000 lb Calculated	191hp/t142kW/t86hp/1000 lb Calculated
Torque-to-weight	309Nm/t207lb-ft/ton Calculated	227Nm/t152lb-ft/ton Calculated
Estimated range	654km407mi Calculated	619km385mi Calculated
Displacement	4,395cc268cu in	3,453cc211cu in
Length	4,894mm193in	4,755mm187in
Width	1,894mm75in	1,725mm68in
Height	1,365mm54in	1,355mm53in
Wheelbase	2,855mm112in	2,625mm103in
Front track	1,600mm63in	1,430mm56in
Rear track	1,665mm66in	1,464mm58in
Ground clearance	123mm5in	-
Trunk volume	300L	335L
Max trunk volume	350L	-
Doors	2	2
Seats	4	4
Fuel tank	70L	70L
CO2 emissions	249g/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 6 Series Convertible (F12) 650iBMW 6 Series (E24) Facelift 1982 M 635CSiPowerTorque

Dyno simulation data table
Vehicle	Peak power RPM	Peak torque RPM	Max engine speed
BMW6 Series Convertible (F12)650i	5,500-6,400 rpm	1,750-4,500 rpm	6,650 rpm
BMW6 Series (E24)Facelift 1982M 635CSi	6,500 rpm	4,500 rpm	6,750 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
Metric	BMW6 Series Convertible (F12)650i	BMW6 Series (E24)Facelift 1982M 635CSi
	Acceleration checkpoints
0-60 mph 0-97 km/h	4.7 s	6.1 s
0-100 km/h 0-62 mph	5.0 s	6.4 s
0-200 km/h 0-124 mph	18.3 s	24.6 s
Top speed	Unrestricted 260 km/h162 mph Restricted 250 km/h155 mph Likely limited	255 km/h 158 mph
	Drag race simulation
60 ft 18 m	2.1 s	2.4 s
330 ft 101 m	5.7 s	6.3 s
1/8 mile 201 m	8.6 s	9.5 s
1000 ft 305 m	11.1 s	12.2 s
1/4 mile 402 m	13.2 s	14.5 s
Trap speed 1/4 mile 402 m	174 km/h 108 mph	160 km/h 99 mph

Power comparison

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

Chart data table
Vehicle	Value
BMW6 Series Convertible (F12)650i	407 hp 304 kW
BMW6 Series (E24)Facelift 1982M 635CSi	286 hp 213 kW

BMW 6 Series Convertible (F12) 650i has 121 hp more than BMW 6 Series (E24) Facelift 1982 M 635CSi.

The biggest power difference is between BMW 6 Series (E24) Facelift 1982 M 635CSi and BMW 6 Series Convertible (F12) 650i: 121 hp (90 kW).

Torque comparison

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

Chart data table
Vehicle	Value
BMW6 Series Convertible (F12)650i	600 Nm 443 lb-ft
BMW6 Series (E24)Facelift 1982M 635CSi	340 Nm 251 lb-ft

Curb weight comparison

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

Chart data table
Vehicle	Value
BMW6 Series Convertible (F12)650i	1,940 kg 4,277 lb
BMW6 Series (E24)Facelift 1982M 635CSi	1,500 kg 3,307 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
BMW6 Series Convertible (F12)650i	Unrestricted 260 km/h162 mph Restricted 250 km/h155 mph
BMW6 Series (E24)Facelift 1982M 635CSi	255 km/h 158 mph

0-100 km/h comparison

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

Chart data table
Vehicle	Value
BMW6 Series Convertible (F12)650i	5.0 s
BMW6 Series (E24)Facelift 1982M 635CSi	6.4 s

The biggest 0-100 km/h difference is between BMW 6 Series Convertible (F12) 650i and BMW 6 Series (E24) Facelift 1982 M 635CSi: 1.4 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
BMW6 Series Convertible (F12)650i	10.7 L/100 km 22.0 mpg US 26.4 mpg UK
BMW6 Series (E24)Facelift 1982M 635CSi	11.3 L/100 km 20.8 mpg US 25.0 mpg UK

The biggest fuel consumption difference is between BMW 6 Series Convertible (F12) 650i and BMW 6 Series (E24) Facelift 1982 M 635CSi: 0.6 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
BMW6 Series Convertible (F12)650i	210 hp/t 156 kW/t 4.8 kg/hp
BMW6 Series (E24)Facelift 1982M 635CSi	191 hp/t 142 kW/t 5.2 kg/hp

Estimated range comparison

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

Chart data table
Vehicle	Value
BMW6 Series Convertible (F12)650i	654 km 407 mi
BMW6 Series (E24)Facelift 1982M 635CSi	619 km 385 mi

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
Vehicle	Power	Acceleration	Top speed
BMW6 Series Convertible (F12)650i	407 hp 304 kW	5.0 s	Unrestricted 260 km/h162 mph Restricted 250 km/h155 mph
BMW6 Series (E24)Facelift 1982M 635CSi	286 hp 213 kW	6.4 s	255 km/h 158 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

BMW6 Series Convertible (F12)650i

Power	407 hp 304 kW
0-100 km/h	5.0 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

BMW6 Series (E24)Facelift 1982M 635CSi

Power	286 hp 213 kW
0-100 km/h	6.4 s
Top speed 255 km/h 158 mph

Doors/seats	2 doors 4 seats
Trunk	335 L 11.8 cu ft
Length	4,755 mm 187.2 in
Height	1,355 mm 53.3 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

BMW6 Series Convertible (F12)650i

Power	407 hp 304 kW
0-100 km/h	5.0 s
Top speed Unrestricted 260 km/h162 mph Restricted 250 km/h155 mph

10.7 L/100 km

22.0 mpg US

26.4 mpg UK

BMW6 Series (E24)Facelift 1982M 635CSi

Power	286 hp 213 kW
0-100 km/h	6.4 s
Top speed 255 km/h 158 mph

11.3 L/100 km

20.8 mpg US

25.0 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
BMW6 Series Convertible (F12)650i	10.7 L/100 km 22.0 mpg US 26.4 mpg UK	5.0 s
BMW6 Series (E24)Facelift 1982M 635CSi	11.3 L/100 km 20.8 mpg US 25.0 mpg UK	6.4 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
BMW6 Series Convertible (F12)650i	210 hp/t 156 kW/t 4.8 kg/hp	10.7 L/100 km 22.0 mpg US 26.4 mpg UK
BMW6 Series (E24)Facelift 1982M 635CSi	191 hp/t 142 kW/t 5.2 kg/hp	11.3 L/100 km 20.8 mpg US 25.0 mpg UK

Detailed score breakdown

Vehicle

BMW6 Series Convertible (F12)650i

BMW6 Series (E24)Facelift 1982M 635CSi

Power

407 hp

304 kW

286 hp

213 kW

Torque

600 Nm

443 lb-ft

340 Nm

251 lb-ft

Acceleration

5.0 s

6.4 s

Top speed

Unrestricted

260 km/h162 mph

Restricted

250 km/h155 mph

255 km/h

158 mph

Lightness

1,940 kg

4,277 lb

1,500 kg

3,307 lb

Fuel consumption

10.7 L/100 km

22.0 mpg US

26.4 mpg UK

11.3 L/100 km

20.8 mpg US

25.0 mpg UK

Practicality

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

Doors/seats	2 doors 4 seats
Trunk	335 L 11.8 cu ft
Length	4,755 mm 187.2 in
Height	1,355 mm 53.3 in

Range score

654 km

407 mi

619 km

385 mi

CO2 score

249 g/km

Trunk score

300 L

10.6 cu ft

335 L

11.8 cu ft

Power-to-weight score

210 hp/t

156 kW/t

4.8 kg/hp

191 hp/t

142 kW/t

5.2 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 6 Series Convertible (F12) 650i	BMW 6 Series (E24) Facelift 1982 M 635CSi
Consumption	10.7 L/100 km22 mpg US26.4 mpg UK	11.3 L/100 km20.8 mpg US25 mpg UK
Cost / 100 km	18.72 LC100 km	19.78 LC100 km
Cost / 100 mi	30.13 LC100 mi	31.82 LC100 mi
Annual fuel used	1,605 L424 US gal353 UK gal	1,695 L448 US gal373 UK gal
Annual fuel cost	2,809 LC/year	2,966 LC/year