Car comparison

BMW 6 Series Convertible (F12) 640ivsBMW 4 Series Convertible (F33) · Facelift 2017 430d

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

New comparison

BMW 6 Series Convertible (F12)

640i

320 hp2979 ccGasolineAWDAutomaticTurbochargedCabriolet / convertible2013-2015
VS

BMW 4 Series Convertible (F33) · Facelift 2017

430d

258 hp2993 ccDieselRWDAutomaticTurbochargedCabriolet / convertible2017-2020

Comparison overview

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

Best choices

BMW 4 Series Convertible (F33) Facelift 2017 430d

  • Highest torque
    560 Nm
    413 lb-ft
  • Lightest
    1,770 kg
    3,902 lb
  • Lowest combined fuel consumption
    5.5 L/100 km
    42.8 mpg US
    51.4 mpg UK
  • Lowest city consumption
    6.3 L/100 km
    37.3 mpg US
    44.8 mpg UK
  • Lowest highway consumption
    5.0 L/100 km
    47.0 mpg US
    56.5 mpg UK
  • Lowest CO2 emissions
    144 g/km
  • Best estimated range
    1,036 km
    644 mi
  • Largest trunk
    370 L
  • Best economy score
    92/100
  • Best practicality score
    47/100

BMW 6 Series Convertible (F12) 640i

  • Quickest 0-100 km/h
    5.4 s
  • Fastest top speed
    260 km/h
    162 mph Unrestricted
    250 km/h
    155 mph Restricted
  • Most powerful
    320 hp
    239 kW
  • Best power-to-weight
    168 hp/t
    125 kW/t
    6.0 kg/hp
  • Best overall score
    59/100
  • Best performance score
    66/100

Specification comparison

Specification comparison
ModelBMW6 Series Convertible (F12)640iBMW4 Series Convertible (F33)Facelift 2017430d
Power
320hp239kW
258hp192kW
Torque
450Nm332lb-ft
560Nm413lb-ft
Curb weight
1,910kg4,211lb
1,770kg3,902lb
Gross weight
2,400kg5,291lb
2,220kg4,894lb
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
80.0s99% target: 257 km/h / 160 mph
Calculated
86.0s99% target: 257 km/h / 160 mph
Calculated
0-100 km/h
5.4s
5.9s
0-200 km/h
20.3s
Calculated
22.0s
Calculated
0-60 mph
5.1s
Calculated
5.6s
Calculated
Fuel consumption
8.4L/100 km28mpg US33.6mpg UK
5.5L/100 km42.8mpg US51.4mpg UK
Fuel consumption city
11.4L/100 km20.6mpg US24.8mpg UK
6.3L/100 km37.3mpg US44.8mpg UK
Fuel consumption highway
6.6L/100 km35.6mpg US42.8mpg UK
5L/100 km47mpg US56.5mpg UK
Quarter mile
13.6s
Calculated
14.0s
Calculated
Power-to-weight
168hp/t125kW/t76hp/1000 lb
Calculated
146hp/t109kW/t66hp/1000 lb
Calculated
Torque-to-weight
236Nm/t158lb-ft/ton
Calculated
316Nm/t212lb-ft/ton
Calculated
Estimated range
833km518mi
Calculated
1,036km644mi
Calculated
Displacement
2,979cc182cu in
2,993cc183cu in
Length
4,894mm193in
4,640mm183in
Width
1,894mm75in
1,825mm72in
Height
1,365mm54in
1,384mm54in
Wheelbase
2,855mm112in
2,810mm111in
Front track
1,600mm63in
1,544mm61in
Rear track
1,665mm66in
1,593mm63in
Ground clearance
123mm5in
130mm5in
Trunk volume
300L
370L
Max trunk volume
350L
-
Doors
2
2
Seats
4
4
Fuel tank
70L
57L
CO2 emissions
195g/km
144g/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) 640iBMW 4 Series Convertible (F33) Facelift 2017 430dPowerTorque
  • BMW 6 Series Convertible (F12) 640i: Power / Torque
  • BMW 4 Series Convertible (F33) Facelift 2017 430d: Power / Torque
Dyno simulation data table
VehiclePeak power RPMPeak torque RPMMax engine speed
BMW6 Series Convertible (F12)640i5,800-6,000 rpm1,300-4,500 rpm6,250 rpm
BMW4 Series Convertible (F33)Facelift 2017430d4,000 rpm1,500-3,000 rpm4,250 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
MetricBMW6 Series Convertible (F12)640iBMW4 Series Convertible (F33)Facelift 2017430d
Acceleration checkpoints
0-60 mph
0-97 km/h
5.1 s
5.6 s
0-100 km/h
0-62 mph
5.4 s
5.9 s
0-200 km/h
0-124 mph
20.3 s
22.0 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
5.8 s
6.1 s
1/8 mile
201 m
8.8 s
9.2 s
1000 ft
305 m
11.4 s
11.8 s
1/4 mile
402 m
13.6 s
14.0 s
Trap speed
1/4 mile
402 m
169 km/h
105 mph
165 km/h
102 mph

Power comparison

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

Chart data table
VehicleValue
BMW6 Series Convertible (F12)640i
320 hp
239 kW
BMW4 Series Convertible (F33)Facelift 2017430d
258 hp
192 kW

BMW 6 Series Convertible (F12) 640i has 62 hp more than BMW 4 Series Convertible (F33) Facelift 2017 430d.

The biggest power difference is between BMW 4 Series Convertible (F33) Facelift 2017 430d and BMW 6 Series Convertible (F12) 640i: 62 hp (46 kW).

Torque comparison

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

Chart data table
VehicleValue
BMW6 Series Convertible (F12)640i
450 Nm
332 lb-ft
BMW4 Series Convertible (F33)Facelift 2017430d
560 Nm
413 lb-ft

Curb weight comparison

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

Chart data table
VehicleValue
BMW6 Series Convertible (F12)640i
1,910 kg
4,211 lb
BMW4 Series Convertible (F33)Facelift 2017430d
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 Convertible (F12)640i
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
BMW4 Series Convertible (F33)Facelift 2017430d
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)640i5.4 s
BMW4 Series Convertible (F33)Facelift 2017430d5.9 s

The biggest 0-100 km/h difference is between BMW 6 Series Convertible (F12) 640i and BMW 4 Series Convertible (F33) Facelift 2017 430d: 0.5 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)640i
8.4 L/100 km
28.0 mpg US
33.6 mpg UK
BMW4 Series Convertible (F33)Facelift 2017430d
5.5 L/100 km
42.8 mpg US
51.4 mpg UK

The biggest fuel consumption difference is between BMW 4 Series Convertible (F33) Facelift 2017 430d and BMW 6 Series Convertible (F12) 640i: 2.9 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)640i
168 hp/t
125 kW/t
6.0 kg/hp
BMW4 Series Convertible (F33)Facelift 2017430d
146 hp/t
109 kW/t
6.9 kg/hp

Estimated range comparison

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

Chart data table
VehicleValue
BMW6 Series Convertible (F12)640i
833 km
518 mi
BMW4 Series Convertible (F33)Facelift 2017430d
1,036 km
644 mi

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
VehiclePowerAccelerationTop speed
BMW6 Series Convertible (F12)640i
320 hp
239 kW
5.4 s
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
BMW4 Series Convertible (F33)Facelift 2017430d
258 hp
192 kW
5.9 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)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
BMW4 Series Convertible (F33)Facelift 2017430d
Power
258 hp
192 kW
0-100 km/h5.9 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 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
BMW4 Series Convertible (F33)Facelift 2017430d
Power
258 hp
192 kW
0-100 km/h5.9 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
5.5 L/100 km
42.8 mpg US
51.4 mpg UK

BMW 4 Series Convertible (F33) Facelift 2017 430d 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)640i
8.4 L/100 km
28.0 mpg US
33.6 mpg UK
5.4 s
BMW4 Series Convertible (F33)Facelift 2017430d
5.5 L/100 km
42.8 mpg US
51.4 mpg UK
5.9 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)640i
168 hp/t
125 kW/t
6.0 kg/hp
8.4 L/100 km
28.0 mpg US
33.6 mpg UK
BMW4 Series Convertible (F33)Facelift 2017430d
146 hp/t
109 kW/t
6.9 kg/hp
5.5 L/100 km
42.8 mpg US
51.4 mpg UK

Detailed score breakdown

Detailed score breakdown
VehicleBMW6 Series Convertible (F12)640iBMW4 Series Convertible (F33)Facelift 2017430d
Power
320 hp
239 kW
258 hp
192 kW
Torque
450 Nm
332 lb-ft
560 Nm
413 lb-ft
Acceleration
5.4 s
5.9 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Lightness
1,910 kg
4,211 lb
1,770 kg
3,902 lb
Fuel consumption
8.4 L/100 km
28.0 mpg US
33.6 mpg UK
5.5 L/100 km
42.8 mpg US
51.4 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
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
833 km
518 mi
1,036 km
644 mi
CO2 score
195 g/km
144 g/km
Trunk score
300 L
10.6 cu ft
370 L
13.1 cu ft
Power-to-weight score
168 hp/t
125 kW/t
6.0 kg/hp
146 hp/t
109 kW/t
6.9 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) 640iBMW 4 Series Convertible (F33) Facelift 2017 430d
Consumption8.4 L/100 km28 mpg US33.6 mpg UK5.5 L/100 km42.8 mpg US51.4 mpg UK
Cost / 100 km14.70 LC100 km9.63 LC100 km
Cost / 100 mi23.66 LC100 mi15.49 LC100 mi
Annual fuel used1,260 L333 US gal277 UK gal825 L218 US gal181 UK gal
Annual fuel cost2,205 LC/year1,444 LC/year

Head-to-head comparisons

BMW 6 Series Convertible (F12) 640i

  • Has 62 hp more
  • Is 0.5 s quicker from 0-100 km/h
  • Has 22 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 4 Series Convertible (F33) Facelift 2017 430d

  • Has 110 Nm more
  • Is 140 kg lighter
  • Uses 2.9 L/100 km less fuel
  • Has 203 km (126 mi) more estimated range
  • Has 70 L more trunk volume
  • Emits 51 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) 640i
BMW 4 Series Convertible (F33) 430d
Compare selected cars
2 vehicles selected

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BMW 6 Series Convertible (F12) 640i vs BMW 4 Series Convertible (F33) · Facelift 2017 430d - car comparison - FastVsFaster