Car comparison

BMW 6 Series Gran Turismo (G32) 640ivsBMW 4 Series Convertible (F33) · Facelift 2017 440i

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

New comparison

BMW 6 Series Gran Turismo (G32)

640i

340 hp2998 ccGasolineAWDAutomaticTurbocharged2017-2020
VS

BMW 4 Series Convertible (F33) · Facelift 2017

440i

326 hp2998 ccGasolineRWDAutomaticTurbochargedCabriolet / convertible2017-2020

Comparison overview

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

Best choices

BMW 6 Series Gran Turismo (G32) 640i

  • Quickest 0-100 km/h
    5.3 s
  • Fastest top speed
    260 km/h
    162 mph Unrestricted
    250 km/h
    155 mph Restricted
  • Most powerful
    340 hp
    254 kW
  • Highest torque
    450 Nm
    332 lb-ft
  • Best power-to-weight
    185 hp/t
    138 kW/t
    5.4 kg/hp
  • Largest trunk
    610 L
  • Best overall score
    72/100
  • Best performance score
    68/100
  • Best practicality score
    79/100

BMW 4 Series Convertible (F33) Facelift 2017 440i

  • Lightest
    1,770 kg
    3,902 lb
  • Lowest combined fuel consumption
    7.2 L/100 km
    32.7 mpg US
    39.2 mpg UK
  • Lowest city consumption
    9.5 L/100 km
    24.8 mpg US
    29.7 mpg UK
  • Lowest highway consumption
    5.8 L/100 km
    40.6 mpg US
    48.7 mpg UK
  • Lowest CO2 emissions
    167 g/km
  • Best estimated range
    833 km
    518 mi
  • Best economy score
    87/100

Specification comparison

Specification comparison
ModelBMW6 Series Gran Turismo (G32)640iBMW4 Series Convertible (F33)Facelift 2017440i
Power
340hp254kW
326hp243kW
Torque
450Nm332lb-ft
450Nm332lb-ft
Curb weight
1,835kg4,045lb
1,770kg3,902lb
Gross weight
2,515kg5,545lb
2,230kg4,916lb
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
71.6s99% target: 257 km/h / 160 mph
Calculated
74.8s99% target: 257 km/h / 160 mph
Calculated
0-100 km/h
5.3s
5.4s
0-200 km/h
19.1s
Calculated
19.7s
Calculated
0-60 mph
5.0s
Calculated
5.1s
Calculated
Fuel consumption
8.2L/100 km28.7mpg US34.4mpg UK
7.2L/100 km32.7mpg US39.2mpg UK
Fuel consumption city
11.1L/100 km21.2mpg US25.4mpg UK
9.5L/100 km24.8mpg US29.7mpg UK
Fuel consumption highway
6.5L/100 km36.2mpg US43.5mpg UK
5.8L/100 km40.6mpg US48.7mpg UK
Quarter mile
13.4s
Calculated
13.5s
Calculated
Power-to-weight
185hp/t138kW/t84hp/1000 lb
Calculated
184hp/t137kW/t84hp/1000 lb
Calculated
Torque-to-weight
245Nm/t164lb-ft/ton
Calculated
254Nm/t170lb-ft/ton
Calculated
Estimated range
829km515mi
Calculated
833km518mi
Calculated
Displacement
2,998cc183cu in
2,998cc183cu in
Length
5,091mm200in
4,640mm183in
Width
1,902mm75in
1,825mm72in
Height
1,540mm61in
1,384mm54in
Wheelbase
3,070mm121in
2,810mm111in
Front track
1,615mm64in
1,544mm61in
Rear track
1,647mm65in
1,593mm63in
Ground clearance
138mm5in
130mm5in
Trunk volume
610L
370L
Max trunk volume
1,800L
-
Doors
5
2
Seats
5
4
Fuel tank
68L
60L
CO2 emissions
187g/km
167g/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) 640iBMW 4 Series Convertible (F33) Facelift 2017 440iPowerTorque
  • BMW 6 Series Gran Turismo (G32) 640i: Power / Torque
  • BMW 4 Series Convertible (F33) Facelift 2017 440i: Power / Torque
Dyno simulation data table
VehiclePeak power RPMPeak torque RPMMax engine speed
BMW6 Series Gran Turismo (G32)640i5,500-6,500 rpm1,380-5,200 rpm6,750 rpm
BMW4 Series Convertible (F33)Facelift 2017440i5,500 rpm1,380-5,000 rpm5,750 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
MetricBMW6 Series Gran Turismo (G32)640iBMW4 Series Convertible (F33)Facelift 2017440i
Acceleration checkpoints
0-60 mph
0-97 km/h
5.0 s
5.1 s
0-100 km/h
0-62 mph
5.3 s
5.4 s
0-200 km/h
0-124 mph
19.1 s
19.7 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
8.8 s
1000 ft
305 m
11.3 s
11.4 s
1/4 mile
402 m
13.4 s
13.5 s
Trap speed
1/4 mile
402 m
172 km/h
107 mph
170 km/h
106 mph

Power comparison

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

Chart data table
VehicleValue
BMW6 Series Gran Turismo (G32)640i
340 hp
254 kW
BMW4 Series Convertible (F33)Facelift 2017440i
326 hp
243 kW

BMW 6 Series Gran Turismo (G32) 640i has 14 hp more than BMW 4 Series Convertible (F33) Facelift 2017 440i.

The biggest power difference is between BMW 4 Series Convertible (F33) Facelift 2017 440i and BMW 6 Series Gran Turismo (G32) 640i: 14 hp (10 kW).

Torque comparison

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

Chart data table
VehicleValue
BMW6 Series Gran Turismo (G32)640i
450 Nm
332 lb-ft
BMW4 Series Convertible (F33)Facelift 2017440i
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 Turismo (G32)640i
1,835 kg
4,045 lb
BMW4 Series Convertible (F33)Facelift 2017440i
1,770 kg
3,902 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)640i
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
BMW4 Series Convertible (F33)Facelift 2017440i
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)640i5.3 s
BMW4 Series Convertible (F33)Facelift 2017440i5.4 s

The biggest 0-100 km/h difference is between BMW 6 Series Gran Turismo (G32) 640i and BMW 4 Series Convertible (F33) Facelift 2017 440i: 0.1 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)640i
8.2 L/100 km
28.7 mpg US
34.4 mpg UK
BMW4 Series Convertible (F33)Facelift 2017440i
7.2 L/100 km
32.7 mpg US
39.2 mpg UK

The biggest fuel consumption difference is between BMW 4 Series Convertible (F33) Facelift 2017 440i and BMW 6 Series Gran Turismo (G32) 640i: 1.0 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)640i
185 hp/t
138 kW/t
5.4 kg/hp
BMW4 Series Convertible (F33)Facelift 2017440i
184 hp/t
137 kW/t
5.4 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)640i
829 km
515 mi
BMW4 Series Convertible (F33)Facelift 2017440i
833 km
518 mi

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
VehiclePowerAccelerationTop speed
BMW6 Series Gran Turismo (G32)640i
340 hp
254 kW
5.3 s
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
BMW4 Series Convertible (F33)Facelift 2017440i
326 hp
243 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 Turismo (G32)640i
Power
340 hp
254 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
BMW4 Series Convertible (F33)Facelift 2017440i
Power
326 hp
243 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
370 L
13.1 cu ft
Length
4,640 mm
182.7 in
Height
1,384 mm
54.5 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)640i
Power
340 hp
254 kW
0-100 km/h5.3 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 Convertible (F33)Facelift 2017440i
Power
326 hp
243 kW
0-100 km/h5.4 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
7.2 L/100 km
32.7 mpg US
39.2 mpg UK

BMW 6 Series Gran Turismo (G32) 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 Turismo (G32)640i
8.2 L/100 km
28.7 mpg US
34.4 mpg UK
5.3 s
BMW4 Series Convertible (F33)Facelift 2017440i
7.2 L/100 km
32.7 mpg US
39.2 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 Turismo (G32)640i
185 hp/t
138 kW/t
5.4 kg/hp
8.2 L/100 km
28.7 mpg US
34.4 mpg UK
BMW4 Series Convertible (F33)Facelift 2017440i
184 hp/t
137 kW/t
5.4 kg/hp
7.2 L/100 km
32.7 mpg US
39.2 mpg UK

Detailed score breakdown

Detailed score breakdown
VehicleBMW6 Series Gran Turismo (G32)640iBMW4 Series Convertible (F33)Facelift 2017440i
Power
340 hp
254 kW
326 hp
243 kW
Torque
450 Nm
332 lb-ft
450 Nm
332 lb-ft
Acceleration
5.3 s
5.4 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Lightness
1,835 kg
4,045 lb
1,770 kg
3,902 lb
Fuel consumption
8.2 L/100 km
28.7 mpg US
34.4 mpg UK
7.2 L/100 km
32.7 mpg US
39.2 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
370 L
13.1 cu ft
Length
4,640 mm
182.7 in
Height
1,384 mm
54.5 in
Range score
829 km
515 mi
833 km
518 mi
CO2 score
187 g/km
167 g/km
Trunk score
610 L
21.5 cu ft
370 L
13.1 cu ft
Power-to-weight score
185 hp/t
138 kW/t
5.4 kg/hp
184 hp/t
137 kW/t
5.4 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) 640iBMW 4 Series Convertible (F33) Facelift 2017 440i
Consumption8.2 L/100 km28.7 mpg US34.4 mpg UK7.2 L/100 km32.7 mpg US39.2 mpg UK
Cost / 100 km14.35 LC100 km12.60 LC100 km
Cost / 100 mi23.09 LC100 mi20.28 LC100 mi
Annual fuel used1,230 L325 US gal271 UK gal1,080 L285 US gal238 UK gal
Annual fuel cost2,153 LC/year1,890 LC/year

Head-to-head comparisons

BMW 6 Series Gran Turismo (G32) 640i

  • Has 14 hp more
  • Is 0.1 s quicker from 0-100 km/h
  • Has 1 hp/t better power-to-weight
  • Has 240 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
  • Highest CO2 emissions

BMW 4 Series Convertible (F33) Facelift 2017 440i

  • Is 65 kg lighter
  • Uses 1.0 L/100 km less fuel
  • Has 4 km (3 mi) more estimated range
  • Emits 20 g/km less CO2

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 Gran Turismo (G32) 640i
BMW 4 Series Convertible (F33) 440i
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2 vehicles selected

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