Car comparison

BMW 4 Series Convertible (G23) M440dvsBMW 4 Series Convertible (F33) 435i

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

New comparison

BMW 4 Series Convertible (G23)

M440d

340 hp2993 ccDieselAWDAutomaticTurbochargedCabriolet / convertible2021-2024
VS

BMW 4 Series Convertible (F33)

435i

306 hp2979 ccGasolineRWDAutomaticTurbochargedCabriolet / convertible2014-2016

Comparison overview

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

Best choices

BMW 4 Series Convertible (G23) M440d

  • Quickest 0-100 km/h
    5.0 s
  • Fastest top speed
    260 km/h
    162 mph Unrestricted
    250 km/h
    155 mph Restricted
  • Most powerful
    340 hp
    254 kW
  • Highest torque
    700 Nm
    516 lb-ft
  • Lowest combined fuel consumption
    6.6 L/100 km
    35.6 mpg US
    42.8 mpg UK
  • Best estimated range
    894 km
    555 mi
  • Largest trunk
    300 L
  • Best overall score
    65/100
  • Best performance score
    74/100
  • Best economy score
    89/100
  • Best practicality score
    45/100

Specification comparison

Specification comparison
ModelBMW4 Series Convertible (G23)M440dBMW4 Series Convertible (F33)435i
Power
340hp254kW
306hp228kW
Torque
700Nm516lb-ft
400Nm295lb-ft
Curb weight
1,980kg4,365lb
1,750kg3,858lb
Gross weight
2,480kg5,467lb
2,210kg4,872lb
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
70.3s99% target: 257 km/h / 160 mph
Calculated
78.4s99% target: 257 km/h / 160 mph
Calculated
0-100 km/h
5.0s
5.5s
0-200 km/h
18.3s
Calculated
20.3s
Calculated
0-60 mph
4.7s
Calculated
5.2s
Calculated
Fuel consumption
6.6L/100 km35.6mpg US42.8mpg UK
7.5L/100 km31.4mpg US37.7mpg UK
Fuel consumption city-
10.8L/100 km21.8mpg US26.2mpg UK
Fuel consumption highway-
5.6L/100 km42mpg US50.4mpg UK
Quarter mile
13.2s
Calculated
13.6s
Calculated
Power-to-weight
172hp/t128kW/t78hp/1000 lb
Calculated
175hp/t130kW/t79hp/1000 lb
Calculated
Torque-to-weight
354Nm/t237lb-ft/ton
Calculated
229Nm/t153lb-ft/ton
Calculated
Estimated range
894km555mi
Calculated
800km497mi
Calculated
Displacement
2,993cc183cu in
2,979cc182cu in
Length
4,768mm188in
4,638mm183in
Width
1,852mm73in
1,825mm72in
Height
1,384mm54in
1,384mm54in
Wheelbase
2,851mm112in
2,810mm111in
Front track
1,573mm62in
1,545mm61in
Rear track
1,612mm63in
1,594mm63in
Ground clearance-
130mm5in
Trunk volume
300L
220L
Max trunk volume
385L
370L
Doors
2
2
Seats
4
4
Fuel tank
59L
60L
CO2 emissions-
176g/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 (G23) M440dBMW 4 Series Convertible (F33) 435iPowerTorque
  • BMW 4 Series Convertible (G23) M440d: Power / Torque
  • BMW 4 Series Convertible (F33) 435i: Power / Torque
Dyno simulation data table
VehiclePeak power RPMPeak torque RPMMax engine speed
BMW4 Series Convertible (G23)M440d4,400 rpm1,750-2,250 rpm4,650 rpm
BMW4 Series Convertible (F33)435i5,800-6,400 rpm1,200-5,000 rpm6,650 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
MetricBMW4 Series Convertible (G23)M440dBMW4 Series Convertible (F33)435i
Acceleration checkpoints
0-60 mph
0-97 km/h
4.7 s
5.2 s
0-100 km/h
0-62 mph
5.0 s
5.5 s
0-200 km/h
0-124 mph
18.3 s
20.3 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
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
5.7 s
5.9 s
1/8 mile
201 m
8.6 s
8.9 s
1000 ft
305 m
11.1 s
11.5 s
1/4 mile
402 m
13.2 s
13.6 s
Trap speed
1/4 mile
402 m
174 km/h
108 mph
169 km/h
105 mph

Power comparison

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

Chart data table
VehicleValue
BMW4 Series Convertible (G23)M440d
340 hp
254 kW
BMW4 Series Convertible (F33)435i
306 hp
228 kW

BMW 4 Series Convertible (G23) M440d has 34 hp more than BMW 4 Series Convertible (F33) 435i.

The biggest power difference is between BMW 4 Series Convertible (F33) 435i and BMW 4 Series Convertible (G23) M440d: 34 hp (25 kW).

Torque comparison

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

Chart data table
VehicleValue
BMW4 Series Convertible (G23)M440d
700 Nm
516 lb-ft
BMW4 Series Convertible (F33)435i
400 Nm
295 lb-ft

Curb weight comparison

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

Chart data table
VehicleValue
BMW4 Series Convertible (G23)M440d
1,980 kg
4,365 lb
BMW4 Series Convertible (F33)435i
1,750 kg
3,858 lb

Top speed without limiter comparison

Bar comparison chart for Top speed without limiter. Higher is better · km/h / mph

Chart data table
VehicleValue
BMW4 Series Convertible (G23)M440d
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
BMW4 Series Convertible (F33)435i
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
BMW4 Series Convertible (G23)M440d5.0 s
BMW4 Series Convertible (F33)435i5.5 s

The biggest 0-100 km/h difference is between BMW 4 Series Convertible (G23) M440d and BMW 4 Series Convertible (F33) 435i: 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
BMW4 Series Convertible (G23)M440d
6.6 L/100 km
35.6 mpg US
42.8 mpg UK
BMW4 Series Convertible (F33)435i
7.5 L/100 km
31.4 mpg US
37.7 mpg UK

The biggest fuel consumption difference is between BMW 4 Series Convertible (G23) M440d and BMW 4 Series Convertible (F33) 435i: 0.9 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
BMW4 Series Convertible (G23)M440d
172 hp/t
128 kW/t
5.8 kg/hp
BMW4 Series Convertible (F33)435i
175 hp/t
130 kW/t
5.7 kg/hp

Estimated range comparison

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

Chart data table
VehicleValue
BMW4 Series Convertible (G23)M440d
894 km
555 mi
BMW4 Series Convertible (F33)435i
800 km
497 mi

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
VehiclePowerAccelerationTop speed
BMW4 Series Convertible (G23)M440d
340 hp
254 kW
5.0 s
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
BMW4 Series Convertible (F33)435i
306 hp
228 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
BMW4 Series Convertible (G23)M440d
Power
340 hp
254 kW
0-100 km/h5.0 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
4,768 mm
187.7 in
Height
1,384 mm
54.5 in
BMW4 Series Convertible (F33)435i
Power
306 hp
228 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
220 L
7.8 cu ft
Length
4,638 mm
182.6 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
BMW4 Series Convertible (G23)M440d
Power
340 hp
254 kW
0-100 km/h5.0 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
6.6 L/100 km
35.6 mpg US
42.8 mpg UK
BMW4 Series Convertible (F33)435i
Power
306 hp
228 kW
0-100 km/h5.5 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
7.5 L/100 km
31.4 mpg US
37.7 mpg UK

BMW 4 Series Convertible (G23) M440d 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
BMW4 Series Convertible (G23)M440d
6.6 L/100 km
35.6 mpg US
42.8 mpg UK
5.0 s
BMW4 Series Convertible (F33)435i
7.5 L/100 km
31.4 mpg US
37.7 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
BMW4 Series Convertible (G23)M440d
172 hp/t
128 kW/t
5.8 kg/hp
6.6 L/100 km
35.6 mpg US
42.8 mpg UK
BMW4 Series Convertible (F33)435i
175 hp/t
130 kW/t
5.7 kg/hp
7.5 L/100 km
31.4 mpg US
37.7 mpg UK

Detailed score breakdown

Detailed score breakdown
VehicleBMW4 Series Convertible (G23)M440dBMW4 Series Convertible (F33)435i
Power
340 hp
254 kW
306 hp
228 kW
Torque
700 Nm
516 lb-ft
400 Nm
295 lb-ft
Acceleration
5.0 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
1,980 kg
4,365 lb
1,750 kg
3,858 lb
Fuel consumption
6.6 L/100 km
35.6 mpg US
42.8 mpg UK
7.5 L/100 km
31.4 mpg US
37.7 mpg UK
Practicality
Doors/seats
2 doors
4 seats
Trunk
300 L
10.6 cu ft
Length
4,768 mm
187.7 in
Height
1,384 mm
54.5 in
Doors/seats
2 doors
4 seats
Trunk
220 L
7.8 cu ft
Length
4,638 mm
182.6 in
Height
1,384 mm
54.5 in
Range score
894 km
555 mi
800 km
497 mi
CO2 score
-
176 g/km
Trunk score
300 L
10.6 cu ft
220 L
7.8 cu ft
Power-to-weight score
172 hp/t
128 kW/t
5.8 kg/hp
175 hp/t
130 kW/t
5.7 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 4 Series Convertible (G23) M440dBMW 4 Series Convertible (F33) 435i
Consumption6.6 L/100 km35.6 mpg US42.8 mpg UK7.5 L/100 km31.4 mpg US37.7 mpg UK
Cost / 100 km11.55 LC100 km13.13 LC100 km
Cost / 100 mi18.59 LC100 mi21.12 LC100 mi
Annual fuel used990 L262 US gal218 UK gal1,125 L297 US gal247 UK gal
Annual fuel cost1,733 LC/year1,969 LC/year

Head-to-head comparisons

BMW 4 Series Convertible (G23) M440d

  • Has 34 hp more
  • Has 300 Nm more
  • Is 0.5 s quicker from 0-100 km/h
  • Uses 0.9 L/100 km less fuel
  • Has 94 km (58 mi) more estimated range
  • Has 80 L more trunk volume

Pros

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

Cons

  • Heaviest

BMW 4 Series Convertible (F33) 435i

  • Is 230 kg lighter
  • Has 3 hp/t better power-to-weight

Pros

  • Lightest
  • Best power-to-weight ratio

Cons

  • Slowest 0-100 km/h
  • Lowest power
  • Highest combined fuel consumption
  • Smallest trunk

Choose cars to compare

Brand
Model
Generation
Engine or modification
BMW 4 Series Convertible (G23) M440d
BMW 4 Series Convertible (F33) 435i
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