Car comparison

BMW 8 Series Gran Coupe (G16) 840ivsBMW 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)

840i

340 hp2998 ccGasolineRWDAutomaticTurbochargedCoupe2019-2020
VS

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.

Best choices

BMW 8 Series Gran Coupe (G16) 840i

  • Quickest 0-100 km/h
    5.2 s
  • Fastest top speed
    265 km/h
    165 mph Unrestricted
    250 km/h
    155 mph Restricted
  • Most powerful
    340 hp
    254 kW
  • Highest torque
    500 Nm
    369 lb-ft
  • Best power-to-weight
    189 hp/t
    141 kW/t
    5.3 kg/hp
  • Lowest combined fuel consumption
    7.5 L/100 km
    31.4 mpg US
    37.7 mpg UK
  • Lowest city consumption
    9.3 L/100 km
    25.3 mpg US
    30.4 mpg UK
  • Lowest highway consumption
    6.5 L/100 km
    36.2 mpg US
    43.5 mpg UK
  • Lowest CO2 emissions
    170 g/km
  • Best estimated range
    907 km
    563 mi
  • Best overall score
    69/100
  • Best performance score
    70/100
  • Best economy score
    87/100
  • Best practicality score
    67/100

Specification comparison

Specification comparison
ModelBMW8 Series Gran Coupe (G16)840iBMW6 Series Coupe (F13)640i
Power
340hp254kW
320hp239kW
Torque
500Nm369lb-ft
450Nm332lb-ft
Curb weight
1,800kg3,968lb
1,765kg3,891lb
Gross weight
2,435kg5,368lb
2,255kg4,971lb
Top speed
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
Calculated
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Calculated
To 99% top speed
75.6s99% target: 262 km/h / 163 mph
Calculated
73.6s99% target: 257 km/h / 160 mph
Calculated
0-100 km/h
5.2s
5.2s
0-200 km/h
18.7s
Calculated
19.1s
Calculated
0-60 mph
4.9s
Calculated
4.9s
Calculated
Fuel consumption
7.5L/100 km31.4mpg US37.7mpg UK
8.2L/100 km28.7mpg US34.4mpg UK
Fuel consumption city
9.3L/100 km25.3mpg US30.4mpg UK
11.2L/100 km21mpg US25.2mpg UK
Fuel consumption highway
6.5L/100 km36.2mpg US43.5mpg UK
6.5L/100 km36.2mpg US43.5mpg UK
Quarter mile
13.3s
Calculated
13.4s
Calculated
Power-to-weight
189hp/t141kW/t86hp/1000 lb
Calculated
181hp/t135kW/t82hp/1000 lb
Calculated
Torque-to-weight
278Nm/t186lb-ft/ton
Calculated
255Nm/t171lb-ft/ton
Calculated
Estimated range
907km563mi
Calculated
854km530mi
Calculated
Displacement
2,998cc183cu 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
170g/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) 840iBMW 6 Series Coupe (F13) 640iPowerTorque
  • BMW 8 Series Gran Coupe (G16) 840i: Power / Torque
  • BMW 6 Series Coupe (F13) 640i: Power / Torque
Dyno simulation data table
VehiclePeak power RPMPeak torque RPMMax engine speed
BMW8 Series Gran Coupe (G16)840i5,000-6,500 rpm1,600-4,500 rpm6,750 rpm
BMW6 Series Coupe (F13)640i5,800-6,000 rpm1,300-4,500 rpm6,250 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
MetricBMW8 Series Gran Coupe (G16)840iBMW6 Series Coupe (F13)640i
Acceleration checkpoints
0-60 mph
0-97 km/h
4.9 s
4.9 s
0-100 km/h
0-62 mph
5.2 s
5.2 s
0-200 km/h
0-124 mph
18.7 s
19.1 s
Top speed
Unrestricted
265 km/h165 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
2.2 s
2.2 s
330 ft
101 m
5.8 s
5.8 s
1/8 mile
201 m
8.7 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
173 km/h
107 mph
172 km/h
107 mph

Power comparison

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

Chart data table
VehicleValue
BMW8 Series Gran Coupe (G16)840i
340 hp
254 kW
BMW6 Series Coupe (F13)640i
320 hp
239 kW

BMW 8 Series Gran Coupe (G16) 840i has 20 hp more than BMW 6 Series Coupe (F13) 640i.

The biggest power difference is between BMW 6 Series Coupe (F13) 640i and BMW 8 Series Gran Coupe (G16) 840i: 20 hp (15 kW).

Torque comparison

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

Chart data table
VehicleValue
BMW8 Series Gran Coupe (G16)840i
500 Nm
369 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
VehicleValue
BMW8 Series Gran Coupe (G16)840i
1,800 kg
3,968 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
VehicleValue
BMW8 Series Gran Coupe (G16)840i
Unrestricted
265 km/h165 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
VehicleValue
BMW8 Series Gran Coupe (G16)840i5.2 s
BMW6 Series Coupe (F13)640i5.2 s

Fuel consumption comparison

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

Chart data table
VehicleValue
BMW8 Series Gran Coupe (G16)840i
7.5 L/100 km
31.4 mpg US
37.7 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) 840i and BMW 6 Series Coupe (F13) 640i: 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
BMW8 Series Gran Coupe (G16)840i
189 hp/t
141 kW/t
5.3 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
VehicleValue
BMW8 Series Gran Coupe (G16)840i
907 km
563 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
VehiclePowerAccelerationTop speed
BMW8 Series Gran Coupe (G16)840i
340 hp
254 kW
5.2 s
Unrestricted
265 km/h165 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.

Chart data table
VehiclePerformance scorePracticality score
BMW8 Series Gran Coupe (G16)840i
Power
340 hp
254 kW
0-100 km/h5.2 s
Top speed
Unrestricted
265 km/h165 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/h5.2 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.

Performance vs fuel economy data table
VehiclePerformance scoreFuel economy score
BMW8 Series Gran Coupe (G16)840i
Power
340 hp
254 kW
0-100 km/h5.2 s
Top speed
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
7.5 L/100 km
31.4 mpg US
37.7 mpg UK
BMW6 Series Coupe (F13)640i
Power
320 hp
239 kW
0-100 km/h5.2 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) 840i 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
BMW8 Series Gran Coupe (G16)840i
7.5 L/100 km
31.4 mpg US
37.7 mpg UK
5.2 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
VehiclePower-to-weight, hp/tFuel consumption, L/100 km
BMW8 Series Gran Coupe (G16)840i
189 hp/t
141 kW/t
5.3 kg/hp
7.5 L/100 km
31.4 mpg US
37.7 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

Detailed score breakdown
VehicleBMW8 Series Gran Coupe (G16)840iBMW6 Series Coupe (F13)640i
Power
340 hp
254 kW
320 hp
239 kW
Torque
500 Nm
369 lb-ft
450 Nm
332 lb-ft
Acceleration
5.2 s
5.2 s
Top speed
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Lightness
1,800 kg
3,968 lb
1,765 kg
3,891 lb
Fuel consumption
7.5 L/100 km
31.4 mpg US
37.7 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
907 km
563 mi
854 km
530 mi
CO2 score
170 g/km
191 g/km
Trunk score
440 L
15.5 cu ft
460 L
16.2 cu ft
Power-to-weight score
189 hp/t
141 kW/t
5.3 kg/hp
181 hp/t
135 kW/t
5.5 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 8 Series Gran Coupe (G16) 840iBMW 6 Series Coupe (F13) 640i
Consumption7.5 L/100 km31.4 mpg US37.7 mpg UK8.2 L/100 km28.7 mpg US34.4 mpg UK
Cost / 100 km13.13 LC100 km14.35 LC100 km
Cost / 100 mi21.12 LC100 mi23.09 LC100 mi
Annual fuel used1,125 L297 US gal247 UK gal1,230 L325 US gal271 UK gal
Annual fuel cost1,969 LC/year2,153 LC/year

Head-to-head comparisons

BMW 8 Series Gran Coupe (G16) 840i

  • Has 20 hp more
  • Has 50 Nm more
  • Has 5 km/h (3 mph) higher top speed
  • Uses 0.7 L/100 km less fuel
  • Has 8 hp/t better power-to-weight
  • Has 53 km (33 mi) more estimated range
  • Emits 21 g/km less CO2

Pros

  • Quickest 0-100 km/h in this comparison
  • Highest top speed
  • Most powerful
  • Highest torque
  • Lowest combined fuel consumption
  • Best power-to-weight ratio
  • Best estimated range

Cons

  • Heaviest
  • Smallest trunk

BMW 6 Series Coupe (F13) 640i

  • Is 35 kg lighter
  • Has 20 L more trunk volume

Pros

  • Lightest
  • Largest trunk

Cons

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

Choose cars to compare

Brand
Model
Generation
Engine or modification
BMW 8 Series Gran Coupe (G16) 840i
BMW 6 Series Coupe (F13) 640i
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BMW 8 Series Gran Coupe (G16) 840i vs BMW 6 Series Coupe (F13) 640i - car comparison - FastVsFaster