Car comparison

BMW 6 Series Coupe (F13) 640ivsBMW 4 Series Coupe (F32) 428i

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

New comparison

BMW 6 Series Coupe (F13)

640i

320 hp2979 ccGasolineAWDAutomaticTurbochargedCoupe2013-2015
VS

BMW 4 Series Coupe (F32)

428i

245 hp1997 ccGasolineRWDAutomaticTurbochargedCoupe2013-2016

Comparison overview

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

Best choices

BMW 6 Series Coupe (F13) 640i

  • Quickest 0-100 km/h
    5.2 s
  • Fastest top speed
    260 km/h
    162 mph Unrestricted
    250 km/h
    155 mph Restricted
  • Most powerful
    320 hp
    239 kW
  • Highest torque
    450 Nm
    332 lb-ft
  • Best power-to-weight
    181 hp/t
    135 kW/t
    5.5 kg/hp
  • Largest trunk
    460 L
  • Best overall score
    64/100
  • Best performance score
    68/100
  • Best practicality score
    54/100

BMW 4 Series Coupe (F32) 428i

  • Lightest
    1,470 kg
    3,241 lb
  • Lowest combined fuel consumption
    6.4 L/100 km
    36.8 mpg US
    44.1 mpg UK
  • Lowest city consumption
    8.3 L/100 km
    28.3 mpg US
    34.0 mpg UK
  • Lowest highway consumption
    5.3 L/100 km
    44.4 mpg US
    53.3 mpg UK
  • Best estimated range
    938 km
    583 mi
  • Best economy score
    90/100

Specification comparison

Specification comparison
ModelBMW6 Series Coupe (F13)640iBMW4 Series Coupe (F32)428i
Power
320hp239kW
245hp183kW
Torque
450Nm332lb-ft
350Nm258lb-ft
Curb weight
1,765kg3,891lb
1,470kg3,241lb
Gross weight
2,255kg4,971lb
1,990kg4,387lb
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
73.6s99% target: 257 km/h / 160 mph
Calculated
79.2s99% target: 257 km/h / 160 mph
Calculated
0-100 km/h
5.2s
5.8s
0-200 km/h
19.1s
Calculated
21.0s
Calculated
0-60 mph
4.9s
Calculated
5.5s
Calculated
Fuel consumption
8.2L/100 km28.7mpg US34.4mpg UK
6.4L/100 km36.8mpg US44.1mpg UK
Fuel consumption city
11.2L/100 km21mpg US25.2mpg UK
8.3L/100 km28.3mpg US34.0mpg UK
Fuel consumption highway
6.5L/100 km36.2mpg US43.5mpg UK
5.3L/100 km44.4mpg US53.3mpg UK
Quarter mile
13.4s
Calculated
13.9s
Calculated
Power-to-weight
181hp/t135kW/t82hp/1000 lb
Calculated
167hp/t124kW/t76hp/1000 lb
Calculated
Torque-to-weight
255Nm/t171lb-ft/ton
Calculated
238Nm/t159lb-ft/ton
Calculated
Estimated range
854km530mi
Calculated
938km583mi
Calculated
Displacement
2,979cc182cu in
1,997cc122cu in
Length
4,894mm193in
4,638mm183in
Width
1,894mm75in
1,825mm72in
Height
1,369mm54in
1,377mm54in
Wheelbase
2,855mm112in
2,810mm111in
Front track
1,600mm63in
1,545mm61in
Rear track
1,665mm66in
1,594mm63in
Ground clearance
124mm5in
130mm5in
Trunk volume
460L
445L
Doors
2
2
Seats
4
4
Fuel tank
70L
60L
CO2 emissions
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 6 Series Coupe (F13) 640iBMW 4 Series Coupe (F32) 428iPowerTorque
  • BMW 6 Series Coupe (F13) 640i: Power / Torque
  • BMW 4 Series Coupe (F32) 428i: Power / Torque
Dyno simulation data table
VehiclePeak power RPMPeak torque RPMMax engine speed
BMW6 Series Coupe (F13)640i5,800-6,000 rpm1,300-4,500 rpm6,250 rpm
BMW4 Series Coupe (F32)428i5,000-6,500 rpm1,250-4,800 rpm6,750 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
MetricBMW6 Series Coupe (F13)640iBMW4 Series Coupe (F32)428i
Acceleration checkpoints
0-60 mph
0-97 km/h
4.9 s
5.5 s
0-100 km/h
0-62 mph
5.2 s
5.8 s
0-200 km/h
0-124 mph
19.1 s
21.0 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
Limited
Drag race simulation
60 ft
18 m
2.2 s
2.3 s
330 ft
101 m
5.8 s
6.1 s
1/8 mile
201 m
8.7 s
9.1 s
1000 ft
305 m
11.2 s
11.7 s
1/4 mile
402 m
13.4 s
13.9 s
Trap speed
1/4 mile
402 m
172 km/h
107 mph
167 km/h
104 mph

Power comparison

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

Chart data table
VehicleValue
BMW6 Series Coupe (F13)640i
320 hp
239 kW
BMW4 Series Coupe (F32)428i
245 hp
183 kW

BMW 6 Series Coupe (F13) 640i has 75 hp more than BMW 4 Series Coupe (F32) 428i.

The biggest power difference is between BMW 4 Series Coupe (F32) 428i and BMW 6 Series Coupe (F13) 640i: 75 hp (56 kW).

Torque comparison

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

Chart data table
VehicleValue
BMW6 Series Coupe (F13)640i
450 Nm
332 lb-ft
BMW4 Series Coupe (F32)428i
350 Nm
258 lb-ft

Curb weight comparison

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

Chart data table
VehicleValue
BMW6 Series Coupe (F13)640i
1,765 kg
3,891 lb
BMW4 Series Coupe (F32)428i
1,470 kg
3,241 lb

Top speed without limiter comparison

Bar comparison chart for Top speed without limiter. Higher is better · km/h / mph

Chart data table
VehicleValue
BMW6 Series Coupe (F13)640i
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
BMW4 Series Coupe (F32)428i
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
BMW6 Series Coupe (F13)640i5.2 s
BMW4 Series Coupe (F32)428i5.8 s

The biggest 0-100 km/h difference is between BMW 6 Series Coupe (F13) 640i and BMW 4 Series Coupe (F32) 428i: 0.6 s.

Fuel consumption comparison

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

Chart data table
VehicleValue
BMW6 Series Coupe (F13)640i
8.2 L/100 km
28.7 mpg US
34.4 mpg UK
BMW4 Series Coupe (F32)428i
6.4 L/100 km
36.8 mpg US
44.1 mpg UK

The biggest fuel consumption difference is between BMW 4 Series Coupe (F32) 428i and BMW 6 Series Coupe (F13) 640i: 1.8 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
BMW6 Series Coupe (F13)640i
181 hp/t
135 kW/t
5.5 kg/hp
BMW4 Series Coupe (F32)428i
167 hp/t
124 kW/t
6.0 kg/hp

Estimated range comparison

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

Chart data table
VehicleValue
BMW6 Series Coupe (F13)640i
854 km
530 mi
BMW4 Series Coupe (F32)428i
938 km
583 mi

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
VehiclePowerAccelerationTop speed
BMW6 Series Coupe (F13)640i
320 hp
239 kW
5.2 s
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
BMW4 Series Coupe (F32)428i
245 hp
183 kW
5.8 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
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
BMW4 Series Coupe (F32)428i
Power
245 hp
183 kW
0-100 km/h5.8 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Doors/seats
2 doors
4 seats
Trunk
445 L
15.7 cu ft
Length
4,638 mm
182.6 in
Height
1,377 mm
54.2 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
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
BMW4 Series Coupe (F32)428i
Power
245 hp
183 kW
0-100 km/h5.8 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
6.4 L/100 km
36.8 mpg US
44.1 mpg UK

BMW 6 Series Coupe (F13) 640i 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
BMW6 Series Coupe (F13)640i
8.2 L/100 km
28.7 mpg US
34.4 mpg UK
5.2 s
BMW4 Series Coupe (F32)428i
6.4 L/100 km
36.8 mpg US
44.1 mpg UK
5.8 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
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
BMW4 Series Coupe (F32)428i
167 hp/t
124 kW/t
6.0 kg/hp
6.4 L/100 km
36.8 mpg US
44.1 mpg UK

Detailed score breakdown

Detailed score breakdown
VehicleBMW6 Series Coupe (F13)640iBMW4 Series Coupe (F32)428i
Power
320 hp
239 kW
245 hp
183 kW
Torque
450 Nm
332 lb-ft
350 Nm
258 lb-ft
Acceleration
5.2 s
5.8 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
1,470 kg
3,241 lb
Fuel consumption
8.2 L/100 km
28.7 mpg US
34.4 mpg UK
6.4 L/100 km
36.8 mpg US
44.1 mpg UK
Practicality
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
Doors/seats
2 doors
4 seats
Trunk
445 L
15.7 cu ft
Length
4,638 mm
182.6 in
Height
1,377 mm
54.2 in
Range score
854 km
530 mi
938 km
583 mi
CO2 score
191 g/km
-
Trunk score
460 L
16.2 cu ft
445 L
15.7 cu ft
Power-to-weight score
181 hp/t
135 kW/t
5.5 kg/hp
167 hp/t
124 kW/t
6.0 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 6 Series Coupe (F13) 640iBMW 4 Series Coupe (F32) 428i
Consumption8.2 L/100 km28.7 mpg US34.4 mpg UK6.4 L/100 km36.8 mpg US44.1 mpg UK
Cost / 100 km14.35 LC100 km11.20 LC100 km
Cost / 100 mi23.09 LC100 mi18.02 LC100 mi
Annual fuel used1,230 L325 US gal271 UK gal960 L254 US gal211 UK gal
Annual fuel cost2,153 LC/year1,680 LC/year

Head-to-head comparisons

BMW 6 Series Coupe (F13) 640i

  • Has 75 hp more
  • Has 100 Nm more
  • Is 0.6 s quicker from 0-100 km/h
  • Has 15 hp/t better power-to-weight
  • Has 15 L more trunk volume

Pros

  • Quickest 0-100 km/h in this comparison
  • Highest top speed
  • Most powerful
  • Highest torque
  • Best power-to-weight ratio
  • Largest trunk

Cons

  • Highest combined fuel consumption
  • Heaviest

BMW 4 Series Coupe (F32) 428i

  • Is 295 kg lighter
  • Uses 1.8 L/100 km less fuel
  • Has 84 km (52 mi) more estimated range

Pros

  • Lightest
  • Lowest combined fuel consumption
  • Best estimated range

Cons

  • Slowest 0-100 km/h
  • Lowest power
  • Smallest trunk

Choose cars to compare

Brand
Model
Generation
Engine or modification
BMW 6 Series Coupe (F13) 640i
BMW 4 Series Coupe (F32) 428i
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BMW 6 Series Coupe (F13) 640i vs BMW 4 Series Coupe (F32) 428i - car comparison - FastVsFaster