Car comparison

BMW 6 Series Gran Coupe (F06) 640ivsBMW 6 Series Convertible (F12) 640i

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

New comparison

BMW 6 Series Gran Coupe (F06)

640i

320 hp2979 ccGasolineRWDAutomaticTurbochargedCoupe2012-2015
VS

BMW 6 Series Convertible (F12)

640i

320 hp2979 ccGasolineAWDAutomaticTurbochargedCabriolet / convertible2013-2015

Comparison overview

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

Best choices

BMW 6 Series Gran Coupe (F06) 640i

  • Quickest 0-100 km/h
    5.4 s
  • Fastest top speed
    265 km/h
    165 mph Unrestricted
    250 km/h
    155 mph Restricted
  • Most powerful
    320 hp
    239 kW
  • Highest torque
    450 Nm
    332 lb-ft
  • Lightest
    1,750 kg
    3,858 lb
  • Best power-to-weight
    183 hp/t
    136 kW/t
    5.5 kg/hp
  • Lowest combined fuel consumption
    7.9 L/100 km
    29.8 mpg US
    35.8 mpg UK
  • Lowest city consumption
    10.7 L/100 km
    22.0 mpg US
    26.4 mpg UK
  • Lowest highway consumption
    6.2 L/100 km
    37.9 mpg US
    45.6 mpg UK
  • Lowest CO2 emissions
    183 g/km
  • Best estimated range
    886 km
    551 mi
  • Largest trunk
    460 L
  • Best overall score
    65/100
  • Best performance score
    68/100
  • Best economy score
    86/100
  • Best practicality score
    60/100

Specification comparison

Specification comparison
ModelBMW6 Series Gran Coupe (F06)640iBMW6 Series Convertible (F12)640i
Power
320hp239kW
320hp239kW
Torque
450Nm332lb-ft
450Nm332lb-ft
Curb weight
1,750kg3,858lb
1,910kg4,211lb
Gross weight
2,360kg5,203lb
2,400kg5,291lb
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
77.8s99% target: 262 km/h / 163 mph
Calculated
80.0s99% target: 257 km/h / 160 mph
Calculated
0-100 km/h
5.4s
5.4s
0-200 km/h
19.3s
Calculated
20.3s
Calculated
0-60 mph
5.1s
Calculated
5.1s
Calculated
Fuel consumption
7.9L/100 km29.8mpg US35.8mpg UK
8.4L/100 km28mpg US33.6mpg UK
Fuel consumption city
10.7L/100 km22mpg US26.4mpg UK
11.4L/100 km20.6mpg US24.8mpg UK
Fuel consumption highway
6.2L/100 km37.9mpg US45.6mpg UK
6.6L/100 km35.6mpg US42.8mpg UK
Quarter mile
13.5s
Calculated
13.6s
Calculated
Power-to-weight
183hp/t136kW/t83hp/1000 lb
Calculated
168hp/t125kW/t76hp/1000 lb
Calculated
Torque-to-weight
257Nm/t172lb-ft/ton
Calculated
236Nm/t158lb-ft/ton
Calculated
Estimated range
886km551mi
Calculated
833km518mi
Calculated
Displacement
2,979cc182cu in
2,979cc182cu in
Length
5,007mm197in
4,894mm193in
Width
1,894mm75in
1,894mm75in
Height
1,392mm55in
1,365mm54in
Wheelbase
2,968mm117in
2,855mm112in
Front track
1,600mm63in
1,600mm63in
Rear track
1,665mm66in
1,665mm66in
Ground clearance
126mm5in
123mm5in
Trunk volume
460L
300L
Max trunk volume
1,265L
350L
Doors
4
2
Seats
4
4
Fuel tank
70L
70L
CO2 emissions
183g/km
195g/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 Gran Coupe (F06) 640iBMW 6 Series Convertible (F12) 640iPowerTorque
  • BMW 6 Series Gran Coupe (F06) 640i: Power / Torque
  • BMW 6 Series Convertible (F12) 640i: Power / Torque
Dyno simulation data table
VehiclePeak power RPMPeak torque RPMMax engine speed
BMW6 Series Gran Coupe (F06)640i5,800-6,000 rpm1,300-4,500 rpm6,250 rpm
BMW6 Series Convertible (F12)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
MetricBMW6 Series Gran Coupe (F06)640iBMW6 Series Convertible (F12)640i
Acceleration checkpoints
0-60 mph
0-97 km/h
5.1 s
5.1 s
0-100 km/h
0-62 mph
5.4 s
5.4 s
0-200 km/h
0-124 mph
19.3 s
20.3 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
5.9 s
5.8 s
1/8 mile
201 m
8.8 s
8.8 s
1000 ft
305 m
11.4 s
11.4 s
1/4 mile
402 m
13.5 s
13.6 s
Trap speed
1/4 mile
402 m
171 km/h
106 mph
169 km/h
105 mph

Power comparison

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

Chart data table
VehicleValue
BMW6 Series Gran Coupe (F06)640i
320 hp
239 kW
BMW6 Series Convertible (F12)640i
320 hp
239 kW

Torque comparison

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

Chart data table
VehicleValue
BMW6 Series Gran Coupe (F06)640i
450 Nm
332 lb-ft
BMW6 Series Convertible (F12)640i
450 Nm
332 lb-ft

Curb weight comparison

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

Chart data table
VehicleValue
BMW6 Series Gran Coupe (F06)640i
1,750 kg
3,858 lb
BMW6 Series Convertible (F12)640i
1,910 kg
4,211 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 Gran Coupe (F06)640i
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
BMW6 Series Convertible (F12)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
BMW6 Series Gran Coupe (F06)640i5.4 s
BMW6 Series Convertible (F12)640i5.4 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 Gran Coupe (F06)640i
7.9 L/100 km
29.8 mpg US
35.8 mpg UK
BMW6 Series Convertible (F12)640i
8.4 L/100 km
28.0 mpg US
33.6 mpg UK

The biggest fuel consumption difference is between BMW 6 Series Gran Coupe (F06) 640i and BMW 6 Series Convertible (F12) 640i: 0.5 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 Gran Coupe (F06)640i
183 hp/t
136 kW/t
5.5 kg/hp
BMW6 Series Convertible (F12)640i
168 hp/t
125 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 Gran Coupe (F06)640i
886 km
551 mi
BMW6 Series Convertible (F12)640i
833 km
518 mi

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
VehiclePowerAccelerationTop speed
BMW6 Series Gran Coupe (F06)640i
320 hp
239 kW
5.4 s
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
BMW6 Series Convertible (F12)640i
320 hp
239 kW
5.4 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 Gran Coupe (F06)640i
Power
320 hp
239 kW
0-100 km/h5.4 s
Top speed
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
Doors/seats
4 doors
4 seats
Trunk
460 L
16.2 cu ft
Length
5,007 mm
197.1 in
Height
1,392 mm
54.8 in
BMW6 Series Convertible (F12)640i
Power
320 hp
239 kW
0-100 km/h5.4 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.

Performance vs fuel economy data table
VehiclePerformance scoreFuel economy score
BMW6 Series Gran Coupe (F06)640i
Power
320 hp
239 kW
0-100 km/h5.4 s
Top speed
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
7.9 L/100 km
29.8 mpg US
35.8 mpg UK
BMW6 Series Convertible (F12)640i
Power
320 hp
239 kW
0-100 km/h5.4 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
8.4 L/100 km
28.0 mpg US
33.6 mpg UK

BMW 6 Series Gran Coupe (F06) 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 Gran Coupe (F06)640i
7.9 L/100 km
29.8 mpg US
35.8 mpg UK
5.4 s
BMW6 Series Convertible (F12)640i
8.4 L/100 km
28.0 mpg US
33.6 mpg UK
5.4 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
VehiclePower-to-weight, hp/tFuel consumption, L/100 km
BMW6 Series Gran Coupe (F06)640i
183 hp/t
136 kW/t
5.5 kg/hp
7.9 L/100 km
29.8 mpg US
35.8 mpg UK
BMW6 Series Convertible (F12)640i
168 hp/t
125 kW/t
6.0 kg/hp
8.4 L/100 km
28.0 mpg US
33.6 mpg UK

Detailed score breakdown

Detailed score breakdown
VehicleBMW6 Series Gran Coupe (F06)640iBMW6 Series Convertible (F12)640i
Power
320 hp
239 kW
320 hp
239 kW
Torque
450 Nm
332 lb-ft
450 Nm
332 lb-ft
Acceleration
5.4 s
5.4 s
Top speed
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Lightness
1,750 kg
3,858 lb
1,910 kg
4,211 lb
Fuel consumption
7.9 L/100 km
29.8 mpg US
35.8 mpg UK
8.4 L/100 km
28.0 mpg US
33.6 mpg UK
Practicality
Doors/seats
4 doors
4 seats
Trunk
460 L
16.2 cu ft
Length
5,007 mm
197.1 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
886 km
551 mi
833 km
518 mi
CO2 score
183 g/km
195 g/km
Trunk score
460 L
16.2 cu ft
300 L
10.6 cu ft
Power-to-weight score
183 hp/t
136 kW/t
5.5 kg/hp
168 hp/t
125 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 Gran Coupe (F06) 640iBMW 6 Series Convertible (F12) 640i
Consumption7.9 L/100 km29.8 mpg US35.8 mpg UK8.4 L/100 km28 mpg US33.6 mpg UK
Cost / 100 km13.83 LC100 km14.70 LC100 km
Cost / 100 mi22.25 LC100 mi23.66 LC100 mi
Annual fuel used1,185 L313 US gal261 UK gal1,260 L333 US gal277 UK gal
Annual fuel cost2,074 LC/year2,205 LC/year

Head-to-head comparisons

BMW 6 Series Gran Coupe (F06) 640i

  • Is 160 kg lighter
  • Has 5 km/h (3 mph) higher top speed
  • Uses 0.5 L/100 km less fuel
  • Has 15 hp/t better power-to-weight
  • Has 53 km (33 mi) more estimated range
  • Has 160 L more trunk volume
  • Emits 12 g/km less CO2

Pros

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

BMW 6 Series Convertible (F12) 640i

No measurable advantages in the available data.

Cons

  • Highest combined fuel consumption
  • Heaviest
  • Lowest top speed
  • Smallest trunk
  • Highest CO2 emissions

Choose cars to compare

Brand
Model
Generation
Engine or modification
BMW 6 Series Gran Coupe (F06) 640i
BMW 6 Series Convertible (F12) 640i
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