Car comparison

BMW 8 Series Gran Coupe (G16) 840dvsBMW 6 Series Coupe (F13) 640i

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

New comparison

BMW 8 Series Gran Coupe (G16)

840d

320 hp2993 ccDieselAWDAutomaticTurbochargedCoupe2019-2020

BMW 6 Series Coupe (F13)

640i

320 hp2979 ccGasolineAWDAutomaticTurbochargedCoupe2013-2015

Comparison overview

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

BMW 8 Series Gran Coupe (G16) 840d

Quickest 0-100 km/h
5.1 s
Fastest top speed
260 km/h
162 mph Unrestricted
250 km/h
155 mph Restricted
Most powerful
320 hp
239 kW
Highest torque
680 Nm
502 lb-ft
Lowest combined fuel consumption
6.3 L/100 km
37.3 mpg US
44.8 mpg UK
Lowest city consumption
7.4 L/100 km
31.8 mpg US
38.2 mpg UK
Lowest highway consumption
5.7 L/100 km
41.3 mpg US
49.6 mpg UK
Lowest CO2 emissions
166 g/km
Best estimated range
1,079 km
671 mi
Best overall score
70/100
Best performance score
72/100
Best economy score
90/100
Best practicality score
67/100

BMW 6 Series Coupe (F13) 640i

Lightest
1,765 kg
3,891 lb
Best power-to-weight
181 hp/t
135 kW/t
5.5 kg/hp
Largest trunk
460 L

Specification comparison

Specification comparison
Model	BMW8 Series Gran Coupe (G16)840d	BMW6 Series Coupe (F13)640i
Power	320hp239kW	320hp239kW
Torque	680Nm502lb-ft	450Nm332lb-ft
Curb weight	1,925kg4,244lb	1,765kg3,891lb
Gross weight	2,560kg5,644lb	2,255kg4,971lb
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	75.5s99% target: 257 km/h / 160 mph Calculated	73.6s99% target: 257 km/h / 160 mph Calculated
0-100 km/h	5.1s	5.2s
0-200 km/h	19.2s Calculated	19.1s Calculated
0-60 mph	4.8s Calculated	4.9s Calculated
Fuel consumption	6.3L/100 km37.3mpg US44.8mpg UK	8.2L/100 km28.7mpg US34.4mpg UK
Fuel consumption city	7.4L/100 km31.8mpg US38.2mpg UK	11.2L/100 km21mpg US25.2mpg UK
Fuel consumption highway	5.7L/100 km41.3mpg US49.6mpg UK	6.5L/100 km36.2mpg US43.5mpg UK
Quarter mile	13.3s Calculated	13.4s Calculated
Power-to-weight	166hp/t124kW/t75hp/1000 lb Calculated	181hp/t135kW/t82hp/1000 lb Calculated
Torque-to-weight	353Nm/t236lb-ft/ton Calculated	255Nm/t171lb-ft/ton Calculated
Estimated range	1,079km671mi Calculated	854km530mi Calculated
Displacement	2,993cc183cu in	2,979cc182cu in
Length	5,082mm200in	4,894mm193in
Width	1,932mm76in	1,894mm75in
Height	1,407mm55in	1,369mm54in
Wheelbase	3,023mm119in	2,855mm112in
Front track	1,627mm64in	1,600mm63in
Rear track	1,671mm66in	1,665mm66in
Ground clearance	-	124mm5in
Trunk volume	-	460L
Max trunk volume	440L	-
Doors	4	2
Seats	5	4
Fuel tank	68L	70L
CO2 emissions	166g/km	191g/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 8 Series Gran Coupe (G16) 840dBMW 6 Series Coupe (F13) 640iPowerTorque

Dyno simulation data table
Vehicle	Peak power RPM	Peak torque RPM	Max engine speed
BMW8 Series Gran Coupe (G16)840d	4,400 rpm	1,750-2,250 rpm	4,650 rpm
BMW6 Series Coupe (F13)640i	5,800-6,000 rpm	1,300-4,500 rpm	6,250 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
Metric	BMW8 Series Gran Coupe (G16)840d	BMW6 Series Coupe (F13)640i
	Acceleration checkpoints
0-60 mph 0-97 km/h	4.8 s	4.9 s
0-100 km/h 0-62 mph	5.1 s	5.2 s
0-200 km/h 0-124 mph	19.2 s	19.1 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	2.1 s	2.2 s
330 ft 101 m	5.7 s	5.8 s
1/8 mile 201 m	8.6 s	8.7 s
1000 ft 305 m	11.2 s	11.2 s
1/4 mile 402 m	13.3 s	13.4 s
Trap speed 1/4 mile 402 m	172 km/h 107 mph	172 km/h 107 mph

Power comparison

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

Chart data table
Vehicle	Value
BMW8 Series Gran Coupe (G16)840d	320 hp 239 kW
BMW6 Series Coupe (F13)640i	320 hp 239 kW

Torque comparison

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

Chart data table
Vehicle	Value
BMW8 Series Gran Coupe (G16)840d	680 Nm 502 lb-ft
BMW6 Series Coupe (F13)640i	450 Nm 332 lb-ft

Curb weight comparison

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

Chart data table
Vehicle	Value
BMW8 Series Gran Coupe (G16)840d	1,925 kg 4,244 lb
BMW6 Series Coupe (F13)640i	1,765 kg 3,891 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
BMW8 Series Gran Coupe (G16)840d	Unrestricted 260 km/h162 mph Restricted 250 km/h155 mph
BMW6 Series Coupe (F13)640i	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
BMW8 Series Gran Coupe (G16)840d	5.1 s
BMW6 Series Coupe (F13)640i	5.2 s

The biggest 0-100 km/h difference is between BMW 8 Series Gran Coupe (G16) 840d and BMW 6 Series Coupe (F13) 640i: 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
BMW8 Series Gran Coupe (G16)840d	6.3 L/100 km 37.3 mpg US 44.8 mpg UK
BMW6 Series Coupe (F13)640i	8.2 L/100 km 28.7 mpg US 34.4 mpg UK

The biggest fuel consumption difference is between BMW 8 Series Gran Coupe (G16) 840d and BMW 6 Series Coupe (F13) 640i: 1.9 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
BMW8 Series Gran Coupe (G16)840d	166 hp/t 124 kW/t 6.0 kg/hp
BMW6 Series Coupe (F13)640i	181 hp/t 135 kW/t 5.5 kg/hp

Estimated range comparison

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

Chart data table
Vehicle	Value
BMW8 Series Gran Coupe (G16)840d	1,079 km 671 mi
BMW6 Series Coupe (F13)640i	854 km 530 mi

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
Vehicle	Power	Acceleration	Top speed
BMW8 Series Gran Coupe (G16)840d	320 hp 239 kW	5.1 s	Unrestricted 260 km/h162 mph Restricted 250 km/h155 mph
BMW6 Series Coupe (F13)640i	320 hp 239 kW	5.2 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

BMW8 Series Gran Coupe (G16)840d

Power	320 hp 239 kW
0-100 km/h	5.1 s
Top speed Unrestricted 260 km/h162 mph Restricted 250 km/h155 mph

Doors/seats	4 doors 5 seats
Trunk	440 L 15.5 cu ft
Length	5,082 mm 200.1 in
Height	1,407 mm 55.4 in

BMW6 Series Coupe (F13)640i

Power	320 hp 239 kW
0-100 km/h	5.2 s
Top speed Unrestricted 260 km/h162 mph Restricted 250 km/h155 mph

Doors/seats	2 doors 4 seats
Trunk	460 L 16.2 cu ft
Length	4,894 mm 192.7 in
Height	1,369 mm 53.9 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

BMW8 Series Gran Coupe (G16)840d

Power	320 hp 239 kW
0-100 km/h	5.1 s
Top speed Unrestricted 260 km/h162 mph Restricted 250 km/h155 mph

6.3 L/100 km

37.3 mpg US

44.8 mpg UK

BMW6 Series Coupe (F13)640i

Power	320 hp 239 kW
0-100 km/h	5.2 s
Top speed Unrestricted 260 km/h162 mph Restricted 250 km/h155 mph

8.2 L/100 km

28.7 mpg US

34.4 mpg UK

BMW 8 Series Gran Coupe (G16) 840d 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
BMW8 Series Gran Coupe (G16)840d	6.3 L/100 km 37.3 mpg US 44.8 mpg UK	5.1 s
BMW6 Series Coupe (F13)640i	8.2 L/100 km 28.7 mpg US 34.4 mpg UK	5.2 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
BMW8 Series Gran Coupe (G16)840d	166 hp/t 124 kW/t 6.0 kg/hp	6.3 L/100 km 37.3 mpg US 44.8 mpg UK
BMW6 Series Coupe (F13)640i	181 hp/t 135 kW/t 5.5 kg/hp	8.2 L/100 km 28.7 mpg US 34.4 mpg UK

Detailed score breakdown

Vehicle

BMW8 Series Gran Coupe (G16)840d

BMW6 Series Coupe (F13)640i

Power

320 hp

239 kW

320 hp

239 kW

Torque

680 Nm

502 lb-ft

450 Nm

332 lb-ft

Acceleration

5.1 s

5.2 s

Top speed

Unrestricted

260 km/h162 mph

Restricted

250 km/h155 mph

Unrestricted

260 km/h162 mph

Restricted

250 km/h155 mph

Lightness

1,925 kg

4,244 lb

1,765 kg

3,891 lb

Fuel consumption

6.3 L/100 km

37.3 mpg US

44.8 mpg UK

8.2 L/100 km

28.7 mpg US

34.4 mpg UK

Practicality

Doors/seats	4 doors 5 seats
Trunk	440 L 15.5 cu ft
Length	5,082 mm 200.1 in
Height	1,407 mm 55.4 in

Doors/seats	2 doors 4 seats
Trunk	460 L 16.2 cu ft
Length	4,894 mm 192.7 in
Height	1,369 mm 53.9 in

Range score

1,079 km

671 mi

854 km

530 mi

CO2 score

166 g/km

191 g/km

Trunk score

440 L

15.5 cu ft

460 L

16.2 cu ft

Power-to-weight score

166 hp/t

124 kW/t

6.0 kg/hp

181 hp/t

135 kW/t

5.5 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 8 Series Gran Coupe (G16) 840d	BMW 6 Series Coupe (F13) 640i
Consumption	6.3 L/100 km37.3 mpg US44.8 mpg UK	8.2 L/100 km28.7 mpg US34.4 mpg UK
Cost / 100 km	11.03 LC100 km	14.35 LC100 km
Cost / 100 mi	17.74 LC100 mi	23.09 LC100 mi
Annual fuel used	945 L250 US gal208 UK gal	1,230 L325 US gal271 UK gal
Annual fuel cost	1,654 LC/year	2,153 LC/year