Car comparison

BMW 6 Series Gran Turismo (G32) 640dvsBMW 6 Series Convertible (E64) · Facelift 2007 650i

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

New comparison

BMW 6 Series Gran Turismo (G32)

640d

320 hp2993 ccDieselAWDAutomaticTurbocharged2017-2020
VS

BMW 6 Series Convertible (E64) · Facelift 2007

650i

367 hp4799 ccGasolineRWDManualNaturally aspiratedCabriolet / convertible2007-2010

Comparison overview

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

Best choices

BMW 6 Series Gran Turismo (G32) 640d

  • Quickest 0-100 km/h
    5.3 s
  • Fastest top speed
    260 km/h
    162 mph Unrestricted
    250 km/h
    155 mph Restricted
  • Highest torque
    680 Nm
    502 lb-ft
  • 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 performance score
    72/100
  • Best economy score
    90/100
  • Best practicality score
    79/100

Specification comparison

Specification comparison
ModelBMW6 Series Gran Turismo (G32)640dBMW6 Series Convertible (E64)Facelift 2007650i
Power
320hp239kW
367hp274kW
Torque
680Nm502lb-ft
490Nm361lb-ft
Curb weight
1,935kg4,266lb
1,860kg4,101lb
Gross weight
2,615kg5,765lb
2,260kg4,982lb
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
73.3s99% target: 257 km/h / 160 mph
Calculated
76.6s99% target: 257 km/h / 160 mph
Calculated
0-100 km/h
5.3s
5.5s
0-200 km/h
19.3s
Calculated
20.1s
Calculated
0-60 mph
5.0s
Calculated
5.2s
Calculated
Fuel consumption
6.2L/100 km37.9mpg US45.6mpg UK
12.6L/100 km18.7mpg US22.4mpg UK
Fuel consumption city
7.2L/100 km32.7mpg US39.2mpg UK
19.2L/100 km12.3mpg US14.7mpg UK
Fuel consumption highway
5.6L/100 km42mpg US50.4mpg UK
8.8L/100 km26.7mpg US32.1mpg UK
Quarter mile
13.4s
Calculated
13.6s
Calculated
Power-to-weight
165hp/t123kW/t75hp/1000 lb
Calculated
197hp/t147kW/t89hp/1000 lb
Calculated
Torque-to-weight
351Nm/t235lb-ft/ton
Calculated
263Nm/t176lb-ft/ton
Calculated
Estimated range
1,065km661mi
Calculated
556km345mi
Calculated
Displacement
2,993cc183cu in
4,799cc293cu in
Length
5,091mm200in
4,820mm190in
Width
1,902mm75in
1,855mm73in
Height
1,540mm61in
1,374mm54in
Wheelbase
3,070mm121in
2,780mm109in
Front track-
1,558mm61in
Rear track-
1,596mm63in
Trunk volume
610L
300L
Max trunk volume
1,800L
350L
Doors
5
2
Seats
5
4
Fuel tank
66L
70L
CO2 emissions
163g/km
299g/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 Turismo (G32) 640dBMW 6 Series Convertible (E64) Facelift 2007 650iPowerTorque
  • BMW 6 Series Gran Turismo (G32) 640d: Power / Torque
  • BMW 6 Series Convertible (E64) Facelift 2007 650i: Power / Torque
Dyno simulation data table
VehiclePeak power RPMPeak torque RPMMax engine speed
BMW6 Series Gran Turismo (G32)640d4,400 rpm1,750-2,250 rpm4,650 rpm
BMW6 Series Convertible (E64)Facelift 2007650i6,300 rpm3,400 rpm6,550 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
MetricBMW6 Series Gran Turismo (G32)640dBMW6 Series Convertible (E64)Facelift 2007650i
Acceleration checkpoints
0-60 mph
0-97 km/h
5.0 s
5.2 s
0-100 km/h
0-62 mph
5.3 s
5.5 s
0-200 km/h
0-124 mph
19.3 s
20.1 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
2.2 s
2.2 s
330 ft
101 m
5.8 s
5.9 s
1/8 mile
201 m
8.8 s
8.9 s
1000 ft
305 m
11.3 s
11.5 s
1/4 mile
402 m
13.4 s
13.6 s
Trap speed
1/4 mile
402 m
171 km/h
107 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 Turismo (G32)640d
320 hp
239 kW
BMW6 Series Convertible (E64)Facelift 2007650i
367 hp
274 kW

BMW 6 Series Convertible (E64) Facelift 2007 650i has 47 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 (E64) Facelift 2007 650i: 47 hp (35 kW).

Torque comparison

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

Chart data table
VehicleValue
BMW6 Series Gran Turismo (G32)640d
680 Nm
502 lb-ft
BMW6 Series Convertible (E64)Facelift 2007650i
490 Nm
361 lb-ft

Curb weight comparison

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

Chart data table
VehicleValue
BMW6 Series Gran Turismo (G32)640d
1,935 kg
4,266 lb
BMW6 Series Convertible (E64)Facelift 2007650i
1,860 kg
4,101 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 Turismo (G32)640d
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
BMW6 Series Convertible (E64)Facelift 2007650i
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 Turismo (G32)640d5.3 s
BMW6 Series Convertible (E64)Facelift 2007650i5.5 s

Although BMW 6 Series Convertible (E64) Facelift 2007 650i has more power, BMW 6 Series Gran Turismo (G32) 640d is quicker from 0-100 km/h.

The biggest 0-100 km/h difference is between BMW 6 Series Gran Turismo (G32) 640d and BMW 6 Series Convertible (E64) Facelift 2007 650i: 0.2 s.

Fuel consumption comparison

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

Chart data table
VehicleValue
BMW6 Series Gran Turismo (G32)640d
6.2 L/100 km
37.9 mpg US
45.6 mpg UK
BMW6 Series Convertible (E64)Facelift 2007650i
12.6 L/100 km
18.7 mpg US
22.4 mpg UK

The biggest fuel consumption difference is between BMW 6 Series Gran Turismo (G32) 640d and BMW 6 Series Convertible (E64) Facelift 2007 650i: 6.4 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 Turismo (G32)640d
165 hp/t
123 kW/t
6.0 kg/hp
BMW6 Series Convertible (E64)Facelift 2007650i
197 hp/t
147 kW/t
5.1 kg/hp

Estimated range comparison

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

Chart data table
VehicleValue
BMW6 Series Gran Turismo (G32)640d
1,065 km
661 mi
BMW6 Series Convertible (E64)Facelift 2007650i
556 km
345 mi

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
VehiclePowerAccelerationTop speed
BMW6 Series Gran Turismo (G32)640d
320 hp
239 kW
5.3 s
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
BMW6 Series Convertible (E64)Facelift 2007650i
367 hp
274 kW
5.5 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 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
BMW6 Series Convertible (E64)Facelift 2007650i
Power
367 hp
274 kW
0-100 km/h5.5 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
4,820 mm
189.8 in
Height
1,374 mm
54.1 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 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
BMW6 Series Convertible (E64)Facelift 2007650i
Power
367 hp
274 kW
0-100 km/h5.5 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
12.6 L/100 km
18.7 mpg US
22.4 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 Gran Turismo (G32)640d
6.2 L/100 km
37.9 mpg US
45.6 mpg UK
5.3 s
BMW6 Series Convertible (E64)Facelift 2007650i
12.6 L/100 km
18.7 mpg US
22.4 mpg UK
5.5 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 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
BMW6 Series Convertible (E64)Facelift 2007650i
197 hp/t
147 kW/t
5.1 kg/hp
12.6 L/100 km
18.7 mpg US
22.4 mpg UK

Detailed score breakdown

Detailed score breakdown
VehicleBMW6 Series Gran Turismo (G32)640dBMW6 Series Convertible (E64)Facelift 2007650i
Power
320 hp
239 kW
367 hp
274 kW
Torque
680 Nm
502 lb-ft
490 Nm
361 lb-ft
Acceleration
5.3 s
5.5 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Lightness
1,935 kg
4,266 lb
1,860 kg
4,101 lb
Fuel consumption
6.2 L/100 km
37.9 mpg US
45.6 mpg UK
12.6 L/100 km
18.7 mpg US
22.4 mpg UK
Practicality
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
Doors/seats
2 doors
4 seats
Trunk
300 L
10.6 cu ft
Length
4,820 mm
189.8 in
Height
1,374 mm
54.1 in
Range score
1,065 km
661 mi
556 km
345 mi
CO2 score
163 g/km
299 g/km
Trunk score
610 L
21.5 cu ft
300 L
10.6 cu ft
Power-to-weight score
165 hp/t
123 kW/t
6.0 kg/hp
197 hp/t
147 kW/t
5.1 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 Turismo (G32) 640dBMW 6 Series Convertible (E64) Facelift 2007 650i
Consumption6.2 L/100 km37.9 mpg US45.6 mpg UK12.6 L/100 km18.7 mpg US22.4 mpg UK
Cost / 100 km10.85 LC100 km22.05 LC100 km
Cost / 100 mi17.46 LC100 mi35.49 LC100 mi
Annual fuel used930 L246 US gal205 UK gal1,890 L499 US gal416 UK gal
Annual fuel cost1,628 LC/year3,308 LC/year

Head-to-head comparisons

BMW 6 Series Gran Turismo (G32) 640d

  • Has 190 Nm more
  • Is 0.2 s quicker from 0-100 km/h
  • Uses 6.4 L/100 km less fuel
  • Has 509 km (316 mi) more estimated range
  • Has 310 L more trunk volume
  • Emits 136 g/km less CO2

Pros

  • Quickest 0-100 km/h in this comparison
  • Highest top speed
  • Highest torque
  • Lowest combined fuel consumption
  • Best estimated range
  • Largest trunk

Cons

  • Lowest power
  • Heaviest

BMW 6 Series Convertible (E64) Facelift 2007 650i

  • Has 47 hp more
  • Is 75 kg lighter
  • Has 32 hp/t better power-to-weight

Pros

  • Most powerful
  • Lightest
  • Best power-to-weight ratio

Cons

  • Slowest 0-100 km/h
  • Highest combined fuel consumption
  • Smallest trunk
  • Highest CO2 emissions

Choose cars to compare

Brand
Model
Generation
Engine or modification
BMW 6 Series Gran Turismo (G32) 640d
BMW 6 Series Convertible (E64) 650i
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