Car comparison

BMW 6 Series Convertible (F12) 650ivsBMW 6 Series Gran Turismo (G32) 640d

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

New comparison

BMW 6 Series Convertible (F12)

650i

407 hp4395 ccGasolineAWDAutomaticTurbochargedCabriolet / convertible2011-2012
VS

BMW 6 Series Gran Turismo (G32)

640d

320 hp2993 ccDieselAWDAutomaticTurbocharged2017-2020

Comparison overview

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

Best choices

BMW 6 Series Gran Turismo (G32) 640d

  • Highest torque
    680 Nm
    502 lb-ft
  • Lightest
    1,935 kg
    4,266 lb
  • Lowest combined fuel consumption
    6.2 L/100 km
    37.9 mpg US
    45.6 mpg UK
  • Lowest city consumption
    7.2 L/100 km
    32.7 mpg US
    39.2 mpg UK
  • Lowest highway consumption
    5.6 L/100 km
    42.0 mpg US
    50.4 mpg UK
  • Lowest CO2 emissions
    163 g/km
  • Best estimated range
    1,065 km
    661 mi
  • Largest trunk
    610 L
  • Best overall score
    74/100
  • Best economy score
    90/100
  • Best practicality score
    79/100

BMW 6 Series Convertible (F12) 650i

  • Quickest 0-100 km/h
    4.9 s
  • Fastest top speed
    260 km/h
    162 mph Unrestricted
    250 km/h
    155 mph Restricted
  • Most powerful
    407 hp
    304 kW
  • Best power-to-weight
    205 hp/t
    153 kW/t
    4.9 kg/hp
  • Best performance score
    74/100

Specification comparison

Specification comparison
ModelBMW6 Series Convertible (F12)650iBMW6 Series Gran Turismo (G32)640d
Power
407hp304kW
320hp239kW
Torque
600Nm443lb-ft
680Nm502lb-ft
Curb weight
1,985kg4,376lb
1,935kg4,266lb
Gross weight
2,465kg5,434lb
2,615kg5,765lb
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
69.6s99% target: 257 km/h / 160 mph
Calculated
73.3s99% target: 257 km/h / 160 mph
Calculated
0-100 km/h
4.9s
5.3s
0-200 km/h
18.1s
Calculated
19.3s
Calculated
0-60 mph
4.7s
Calculated
5.0s
Calculated
Fuel consumption
11.5L/100 km20.5mpg US24.6mpg UK
6.2L/100 km37.9mpg US45.6mpg UK
Fuel consumption city
16.6L/100 km14.2mpg US17.0mpg UK
7.2L/100 km32.7mpg US39.2mpg UK
Fuel consumption highway
8.5L/100 km27.7mpg US33.2mpg UK
5.6L/100 km42mpg US50.4mpg UK
Quarter mile
13.1s
Calculated
13.4s
Calculated
Power-to-weight
205hp/t153kW/t93hp/1000 lb
Calculated
165hp/t123kW/t75hp/1000 lb
Calculated
Torque-to-weight
302Nm/t202lb-ft/ton
Calculated
351Nm/t235lb-ft/ton
Calculated
Estimated range
609km378mi
Calculated
1,065km661mi
Calculated
Displacement
4,395cc268cu in
2,993cc183cu in
Length
4,894mm193in
5,091mm200in
Width
1,894mm75in
1,902mm75in
Height
1,365mm54in
1,540mm61in
Wheelbase
2,855mm112in
3,070mm121in
Front track
1,600mm63in
-
Rear track
1,665mm66in
-
Ground clearance
123mm5in
-
Trunk volume
300L
610L
Max trunk volume
350L
1,800L
Doors
2
5
Seats
4
5
Fuel tank
70L
66L
CO2 emissions
267g/km
163g/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 Gran Turismo (G32) 640dPowerTorque
  • BMW 6 Series Convertible (F12) 650i: Power / Torque
  • BMW 6 Series Gran Turismo (G32) 640d: Power / Torque
Dyno simulation data table
VehiclePeak power RPMPeak torque RPMMax engine speed
BMW6 Series Convertible (F12)650i5,500-6,400 rpm1,750-4,500 rpm6,650 rpm
BMW6 Series Gran Turismo (G32)640d4,400 rpm1,750-2,250 rpm4,650 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
MetricBMW6 Series Convertible (F12)650iBMW6 Series Gran Turismo (G32)640d
Acceleration checkpoints
0-60 mph
0-97 km/h
4.7 s
5.0 s
0-100 km/h
0-62 mph
4.9 s
5.3 s
0-200 km/h
0-124 mph
18.1 s
19.3 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
5.6 s
5.8 s
1/8 mile
201 m
8.5 s
8.8 s
1000 ft
305 m
11.0 s
11.3 s
1/4 mile
402 m
13.1 s
13.4 s
Trap speed
1/4 mile
402 m
175 km/h
109 mph
171 km/h
107 mph

Power comparison

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

Chart data table
VehicleValue
BMW6 Series Convertible (F12)650i
407 hp
304 kW
BMW6 Series Gran Turismo (G32)640d
320 hp
239 kW

BMW 6 Series Convertible (F12) 650i has 87 hp more than BMW 6 Series Gran Turismo (G32) 640d.

The biggest power difference is between BMW 6 Series Gran Turismo (G32) 640d and BMW 6 Series Convertible (F12) 650i: 87 hp (65 kW).

Torque comparison

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

Chart data table
VehicleValue
BMW6 Series Convertible (F12)650i
600 Nm
443 lb-ft
BMW6 Series Gran Turismo (G32)640d
680 Nm
502 lb-ft

Curb weight comparison

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

Chart data table
VehicleValue
BMW6 Series Convertible (F12)650i
1,985 kg
4,376 lb
BMW6 Series Gran Turismo (G32)640d
1,935 kg
4,266 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 Convertible (F12)650i
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
BMW6 Series Gran Turismo (G32)640d
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 Convertible (F12)650i4.9 s
BMW6 Series Gran Turismo (G32)640d5.3 s

The biggest 0-100 km/h difference is between BMW 6 Series Convertible (F12) 650i and BMW 6 Series Gran Turismo (G32) 640d: 0.4 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 Convertible (F12)650i
11.5 L/100 km
20.5 mpg US
24.6 mpg UK
BMW6 Series Gran Turismo (G32)640d
6.2 L/100 km
37.9 mpg US
45.6 mpg UK

The biggest fuel consumption difference is between BMW 6 Series Gran Turismo (G32) 640d and BMW 6 Series Convertible (F12) 650i: 5.3 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 Convertible (F12)650i
205 hp/t
153 kW/t
4.9 kg/hp
BMW6 Series Gran Turismo (G32)640d
165 hp/t
123 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 Convertible (F12)650i
609 km
378 mi
BMW6 Series Gran Turismo (G32)640d
1,065 km
661 mi

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
VehiclePowerAccelerationTop speed
BMW6 Series Convertible (F12)650i
407 hp
304 kW
4.9 s
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
BMW6 Series Gran Turismo (G32)640d
320 hp
239 kW
5.3 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 Convertible (F12)650i
Power
407 hp
304 kW
0-100 km/h4.9 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 Gran Turismo (G32)640d
Power
320 hp
239 kW
0-100 km/h5.3 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Doors/seats
5 doors
5 seats
Trunk
610 L
21.5 cu ft
Length
5,091 mm
200.4 in
Height
1,540 mm
60.6 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 Convertible (F12)650i
Power
407 hp
304 kW
0-100 km/h4.9 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
11.5 L/100 km
20.5 mpg US
24.6 mpg UK
BMW6 Series Gran Turismo (G32)640d
Power
320 hp
239 kW
0-100 km/h5.3 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
6.2 L/100 km
37.9 mpg US
45.6 mpg UK

BMW 6 Series Gran Turismo (G32) 640d 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 Convertible (F12)650i
11.5 L/100 km
20.5 mpg US
24.6 mpg UK
4.9 s
BMW6 Series Gran Turismo (G32)640d
6.2 L/100 km
37.9 mpg US
45.6 mpg UK
5.3 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 Convertible (F12)650i
205 hp/t
153 kW/t
4.9 kg/hp
11.5 L/100 km
20.5 mpg US
24.6 mpg UK
BMW6 Series Gran Turismo (G32)640d
165 hp/t
123 kW/t
6.0 kg/hp
6.2 L/100 km
37.9 mpg US
45.6 mpg UK

Detailed score breakdown

Detailed score breakdown
VehicleBMW6 Series Convertible (F12)650iBMW6 Series Gran Turismo (G32)640d
Power
407 hp
304 kW
320 hp
239 kW
Torque
600 Nm
443 lb-ft
680 Nm
502 lb-ft
Acceleration
4.9 s
5.3 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Lightness
1,985 kg
4,376 lb
1,935 kg
4,266 lb
Fuel consumption
11.5 L/100 km
20.5 mpg US
24.6 mpg UK
6.2 L/100 km
37.9 mpg US
45.6 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
5 doors
5 seats
Trunk
610 L
21.5 cu ft
Length
5,091 mm
200.4 in
Height
1,540 mm
60.6 in
Range score
609 km
378 mi
1,065 km
661 mi
CO2 score
267 g/km
163 g/km
Trunk score
300 L
10.6 cu ft
610 L
21.5 cu ft
Power-to-weight score
205 hp/t
153 kW/t
4.9 kg/hp
165 hp/t
123 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 Convertible (F12) 650iBMW 6 Series Gran Turismo (G32) 640d
Consumption11.5 L/100 km20.5 mpg US24.6 mpg UK6.2 L/100 km37.9 mpg US45.6 mpg UK
Cost / 100 km20.13 LC100 km10.85 LC100 km
Cost / 100 mi32.39 LC100 mi17.46 LC100 mi
Annual fuel used1,725 L456 US gal379 UK gal930 L246 US gal205 UK gal
Annual fuel cost3,019 LC/year1,628 LC/year

Head-to-head comparisons

BMW 6 Series Convertible (F12) 650i

  • Has 87 hp more
  • Is 0.4 s quicker from 0-100 km/h
  • Has 40 hp/t better power-to-weight

Pros

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

Cons

  • Highest combined fuel consumption
  • Heaviest
  • Smallest trunk
  • Highest CO2 emissions

BMW 6 Series Gran Turismo (G32) 640d

  • Has 80 Nm more
  • Is 50 kg lighter
  • Uses 5.3 L/100 km less fuel
  • Has 456 km (283 mi) more estimated range
  • Has 310 L more trunk volume
  • Emits 104 g/km less CO2

Pros

  • Highest torque
  • Lightest
  • Lowest combined fuel consumption
  • Best estimated range
  • Largest trunk

Cons

  • Slowest 0-100 km/h
  • Lowest power

Choose cars to compare

Brand
Model
Generation
Engine or modification
BMW 6 Series Convertible (F12) 650i
BMW 6 Series Gran Turismo (G32) 640d
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BMW 6 Series Convertible (F12) 650i vs BMW 6 Series Gran Turismo (G32) 640d - car comparison - FastVsFaster