Car comparison

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

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

New comparison

BMW 4 Series Convertible (F33) · Facelift 2017

440i

326 hp2998 ccGasolineRWDAutomaticTurbochargedCabriolet / convertible2017-2020

BMW 6 Series Gran Turismo (G32)

640i

340 hp2998 ccGasolineRWDAutomaticTurbocharged2017-2020

Comparison overview

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

BMW 4 Series Convertible (F33) Facelift 2017 440i

Quickest 0-100 km/h
5.4 s
Fastest top speed
260 km/h
162 mph Unrestricted
250 km/h
155 mph Restricted
Highest torque
450 Nm
332 lb-ft
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 economy score
87/100

BMW 6 Series Gran Turismo (G32) 640i

Most powerful
340 hp
254 kW
Best power-to-weight
192 hp/t
143 kW/t
5.2 kg/hp
Best estimated range
919 km
571 mi
Largest trunk
610 L
Best overall score
72/100
Best performance score
69/100
Best practicality score
79/100

Specification comparison

Specification comparison
Model	BMW4 Series Convertible (F33)Facelift 2017440i	BMW6 Series Gran Turismo (G32)640i
Power	326hp243kW	340hp254kW
Torque	450Nm332lb-ft	450Nm332lb-ft
Curb weight	1,770kg3,902lb	1,770kg3,902lb
Gross weight	2,230kg4,916lb	2,450kg5,401lb
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	74.8s99% target: 257 km/h / 160 mph Calculated	70.6s99% target: 257 km/h / 160 mph Calculated
0-100 km/h	5.4s	5.4s
0-200 km/h	19.7s Calculated	19.1s Calculated
0-60 mph	5.1s Calculated	5.1s Calculated
Fuel consumption	7.2L/100 km32.7mpg US39.2mpg UK	7.4L/100 km31.8mpg US38.2mpg UK
Fuel consumption city	9.5L/100 km24.8mpg US29.7mpg UK	9.8L/100 km24mpg US28.8mpg UK
Fuel consumption highway	5.8L/100 km40.6mpg US48.7mpg UK	6L/100 km39.2mpg US47.1mpg UK
Quarter mile	13.5s Calculated	13.5s Calculated
Power-to-weight	184hp/t137kW/t84hp/1000 lb Calculated	192hp/t143kW/t87hp/1000 lb Calculated
Torque-to-weight	254Nm/t170lb-ft/ton Calculated	254Nm/t170lb-ft/ton Calculated
Estimated range	833km518mi Calculated	919km571mi Calculated
Displacement	2,998cc183cu in	2,998cc183cu in
Length	4,640mm183in	5,091mm200in
Width	1,825mm72in	1,902mm75in
Height	1,384mm54in	1,538mm61in
Wheelbase	2,810mm111in	3,070mm121in
Front track	1,544mm61in	1,615mm64in
Rear track	1,593mm63in	1,649mm65in
Ground clearance	130mm5in	138mm5in
Trunk volume	370L	610L
Max trunk volume	-	1,800L
Doors	2	5
Seats	4	5
Fuel tank	60L	68L
CO2 emissions	167g/km	169g/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 4 Series Convertible (F33) Facelift 2017 440iBMW 6 Series Gran Turismo (G32) 640iPowerTorque

Dyno simulation data table
Vehicle	Peak power RPM	Peak torque RPM	Max engine speed
BMW4 Series Convertible (F33)Facelift 2017440i	5,500 rpm	1,380-5,000 rpm	5,750 rpm
BMW6 Series Gran Turismo (G32)640i	5,500-6,500 rpm	1,380-5,200 rpm	6,750 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
Metric	BMW4 Series Convertible (F33)Facelift 2017440i	BMW6 Series Gran Turismo (G32)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	19.7 s	19.1 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	2.3 s
330 ft 101 m	5.9 s	5.9 s
1/8 mile 201 m	8.8 s	8.9 s
1000 ft 305 m	11.4 s	11.4 s
1/4 mile 402 m	13.5 s	13.5 s
Trap speed 1/4 mile 402 m	170 km/h 106 mph	172 km/h 107 mph

Power comparison

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

Chart data table
Vehicle	Value
BMW4 Series Convertible (F33)Facelift 2017440i	326 hp 243 kW
BMW6 Series Gran Turismo (G32)640i	340 hp 254 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
Vehicle	Value
BMW4 Series Convertible (F33)Facelift 2017440i	450 Nm 332 lb-ft
BMW6 Series Gran Turismo (G32)640i	450 Nm 332 lb-ft

Curb weight comparison

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

Chart data table
Vehicle	Value
BMW4 Series Convertible (F33)Facelift 2017440i	1,770 kg 3,902 lb
BMW6 Series Gran Turismo (G32)640i	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
Vehicle	Value
BMW4 Series Convertible (F33)Facelift 2017440i	Unrestricted 260 km/h162 mph Restricted 250 km/h155 mph
BMW6 Series Gran Turismo (G32)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
Vehicle	Value
BMW4 Series Convertible (F33)Facelift 2017440i	5.4 s
BMW6 Series Gran Turismo (G32)640i	5.4 s

Although BMW 6 Series Gran Turismo (G32) 640i has more power, BMW 4 Series Convertible (F33) Facelift 2017 440i is quicker from 0-100 km/h.

Fuel consumption comparison

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

Chart data table
Vehicle	Value
BMW4 Series Convertible (F33)Facelift 2017440i	7.2 L/100 km 32.7 mpg US 39.2 mpg UK
BMW6 Series Gran Turismo (G32)640i	7.4 L/100 km 31.8 mpg US 38.2 mpg UK

Power-to-weight comparison

Bar comparison chart for Power-to-weight. Higher is better · hp/t / kW/t

Chart data table
Vehicle	Value
BMW4 Series Convertible (F33)Facelift 2017440i	184 hp/t 137 kW/t 5.4 kg/hp
BMW6 Series Gran Turismo (G32)640i	192 hp/t 143 kW/t 5.2 kg/hp

Estimated range comparison

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

Chart data table
Vehicle	Value
BMW4 Series Convertible (F33)Facelift 2017440i	833 km 518 mi
BMW6 Series Gran Turismo (G32)640i	919 km 571 mi

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
Vehicle	Power	Acceleration	Top speed
BMW4 Series Convertible (F33)Facelift 2017440i	326 hp 243 kW	5.4 s	Unrestricted 260 km/h162 mph Restricted 250 km/h155 mph
BMW6 Series Gran Turismo (G32)640i	340 hp 254 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.

Vehicle

Performance score

Practicality score

BMW4 Series Convertible (F33)Facelift 2017440i

Power	326 hp 243 kW
0-100 km/h	5.4 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

BMW6 Series Gran Turismo (G32)640i

Power	340 hp 254 kW
0-100 km/h	5.4 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	1,538 mm 60.6 in

Performance vs fuel economy

Cars closer to the top-right corner combine stronger performance with better fuel economy scores.

Vehicle

Performance score

Fuel economy score

BMW4 Series Convertible (F33)Facelift 2017440i

Power	326 hp 243 kW
0-100 km/h	5.4 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

BMW6 Series Gran Turismo (G32)640i

Power	340 hp 254 kW
0-100 km/h	5.4 s
Top speed Unrestricted 260 km/h162 mph Restricted 250 km/h155 mph

7.4 L/100 km

31.8 mpg US

38.2 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
Vehicle	Fuel consumption, L/100 km	0-100 km/h, s
BMW4 Series Convertible (F33)Facelift 2017440i	7.2 L/100 km 32.7 mpg US 39.2 mpg UK	5.4 s
BMW6 Series Gran Turismo (G32)640i	7.4 L/100 km 31.8 mpg US 38.2 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
Vehicle	Power-to-weight, hp/t	Fuel consumption, L/100 km
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
BMW6 Series Gran Turismo (G32)640i	192 hp/t 143 kW/t 5.2 kg/hp	7.4 L/100 km 31.8 mpg US 38.2 mpg UK

Detailed score breakdown

Vehicle

BMW4 Series Convertible (F33)Facelift 2017440i

BMW6 Series Gran Turismo (G32)640i

Power

326 hp

243 kW

340 hp

254 kW

Torque

450 Nm

332 lb-ft

450 Nm

332 lb-ft

Acceleration

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

1,770 kg

3,902 lb

1,770 kg

3,902 lb

Fuel consumption

7.2 L/100 km

32.7 mpg US

39.2 mpg UK

7.4 L/100 km

31.8 mpg US

38.2 mpg UK

Practicality

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

Doors/seats	5 doors 5 seats
Trunk	610 L 21.5 cu ft
Length	5,091 mm 200.4 in
Height	1,538 mm 60.6 in

Range score

833 km

518 mi

919 km

571 mi

CO2 score

167 g/km

169 g/km

Trunk score

370 L

13.1 cu ft

610 L

21.5 cu ft

Power-to-weight score

184 hp/t

137 kW/t

5.4 kg/hp

192 hp/t

143 kW/t

5.2 kg/hp

Overall

Fixed score

Fuel cost and annual usage

Estimate running costs from combined consumption, your annual distance, and the fuel price in your local currency.

Average annual distanceDistance unitFuel price in your local currencyPrice unit

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
Vehicle	BMW 4 Series Convertible (F33) Facelift 2017 440i	BMW 6 Series Gran Turismo (G32) 640i
Consumption	7.2 L/100 km32.7 mpg US39.2 mpg UK	7.4 L/100 km31.8 mpg US38.2 mpg UK
Cost / 100 km	12.60 LC100 km	12.95 LC100 km
Cost / 100 mi	20.28 LC100 mi	20.84 LC100 mi
Annual fuel used	1,080 L285 US gal238 UK gal	1,110 L293 US gal244 UK gal
Annual fuel cost	1,890 LC/year	1,943 LC/year