Car comparison

BMW 4 Series Convertible (G23) M440dvsBMW 2 Series Convertible (F23) M235i

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 2 Series Convertible (F23)

M235i

326 hp2979 ccGasolineRWDManualTurbochargedCabriolet / convertible2015-2016

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)M440dBMW2 Series Convertible (F23)M235i
Power
340hp254kW
326hp243kW
Torque
700Nm516lb-ft
450Nm332lb-ft
Curb weight
1,980kg4,365lb
1,600kg3,527lb
Gross weight
2,480kg5,467lb
2,030kg4,475lb
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
71.7s99% target: 257 km/h / 160 mph
Calculated
0-100 km/h
5.0s
5.2s
0-200 km/h
18.3s
Calculated
18.9s
Calculated
0-60 mph
4.7s
Calculated
4.9s
Calculated
Fuel consumption
6.6L/100 km35.6mpg US42.8mpg UK
8.5L/100 km27.7mpg US33.2mpg UK
Fuel consumption city-
11.5L/100 km20.5mpg US24.6mpg UK
Fuel consumption highway-
6.8L/100 km34.6mpg US41.5mpg UK
Quarter mile
13.2s
Calculated
13.3s
Calculated
Power-to-weight
172hp/t128kW/t78hp/1000 lb
Calculated
204hp/t152kW/t92hp/1000 lb
Calculated
Torque-to-weight
354Nm/t237lb-ft/ton
Calculated
281Nm/t188lb-ft/ton
Calculated
Estimated range
894km555mi
Calculated
612km380mi
Calculated
Displacement
2,993cc183cu in
2,979cc182cu in
Length
4,768mm188in
4,454mm175in
Width
1,852mm73in
1,774mm70in
Height
1,384mm54in
1,403mm55in
Wheelbase
2,851mm112in
2,690mm106in
Front track
1,573mm62in
1,516mm60in
Rear track
1,612mm63in
1,534mm60in
Ground clearance-
130mm5in
Trunk volume
300L
280L
Max trunk volume
385L
335L
Doors
2
2
Seats
4
4
Fuel tank
59L
52L
CO2 emissions-
199g/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 2 Series Convertible (F23) M235iPowerTorque
  • BMW 4 Series Convertible (G23) M440d: Power / Torque
  • BMW 2 Series Convertible (F23) M235i: 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
BMW2 Series Convertible (F23)M235i5,800-6,000 rpm1,300-4,500 rpm6,250 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
MetricBMW4 Series Convertible (G23)M440dBMW2 Series Convertible (F23)M235i
Acceleration checkpoints
0-60 mph
0-97 km/h
4.7 s
4.9 s
0-100 km/h
0-62 mph
5.0 s
5.2 s
0-200 km/h
0-124 mph
18.3 s
18.9 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
5.8 s
1/8 mile
201 m
8.6 s
8.7 s
1000 ft
305 m
11.1 s
11.2 s
1/4 mile
402 m
13.2 s
13.3 s
Trap speed
1/4 mile
402 m
174 km/h
108 mph
173 km/h
107 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
BMW2 Series Convertible (F23)M235i
326 hp
243 kW

BMW 4 Series Convertible (G23) M440d has 14 hp more than BMW 2 Series Convertible (F23) M235i.

The biggest power difference is between BMW 2 Series Convertible (F23) M235i and BMW 4 Series Convertible (G23) M440d: 14 hp (10 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
BMW2 Series Convertible (F23)M235i
450 Nm
332 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
BMW2 Series Convertible (F23)M235i
1,600 kg
3,527 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
BMW2 Series Convertible (F23)M235i
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
BMW2 Series Convertible (F23)M235i5.2 s

The biggest 0-100 km/h difference is between BMW 4 Series Convertible (G23) M440d and BMW 2 Series Convertible (F23) M235i: 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
BMW4 Series Convertible (G23)M440d
6.6 L/100 km
35.6 mpg US
42.8 mpg UK
BMW2 Series Convertible (F23)M235i
8.5 L/100 km
27.7 mpg US
33.2 mpg UK

The biggest fuel consumption difference is between BMW 4 Series Convertible (G23) M440d and BMW 2 Series Convertible (F23) M235i: 1.9 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
BMW2 Series Convertible (F23)M235i
204 hp/t
152 kW/t
4.9 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
BMW2 Series Convertible (F23)M235i
612 km
380 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
BMW2 Series Convertible (F23)M235i
326 hp
243 kW
5.2 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
BMW2 Series Convertible (F23)M235i
Power
326 hp
243 kW
0-100 km/h5.2 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Doors/seats
2 doors
4 seats
Trunk
280 L
9.9 cu ft
Length
4,454 mm
175.4 in
Height
1,403 mm
55.2 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
BMW2 Series Convertible (F23)M235i
Power
326 hp
243 kW
0-100 km/h5.2 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
8.5 L/100 km
27.7 mpg US
33.2 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
BMW2 Series Convertible (F23)M235i
8.5 L/100 km
27.7 mpg US
33.2 mpg UK
5.2 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
BMW2 Series Convertible (F23)M235i
204 hp/t
152 kW/t
4.9 kg/hp
8.5 L/100 km
27.7 mpg US
33.2 mpg UK

Detailed score breakdown

Detailed score breakdown
VehicleBMW4 Series Convertible (G23)M440dBMW2 Series Convertible (F23)M235i
Power
340 hp
254 kW
326 hp
243 kW
Torque
700 Nm
516 lb-ft
450 Nm
332 lb-ft
Acceleration
5.0 s
5.2 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
1,600 kg
3,527 lb
Fuel consumption
6.6 L/100 km
35.6 mpg US
42.8 mpg UK
8.5 L/100 km
27.7 mpg US
33.2 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
280 L
9.9 cu ft
Length
4,454 mm
175.4 in
Height
1,403 mm
55.2 in
Range score
894 km
555 mi
612 km
380 mi
CO2 score
-
199 g/km
Trunk score
300 L
10.6 cu ft
280 L
9.9 cu ft
Power-to-weight score
172 hp/t
128 kW/t
5.8 kg/hp
204 hp/t
152 kW/t
4.9 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 4 Series Convertible (G23) M440dBMW 2 Series Convertible (F23) M235i
Consumption6.6 L/100 km35.6 mpg US42.8 mpg UK8.5 L/100 km27.7 mpg US33.2 mpg UK
Cost / 100 km11.55 LC100 km14.88 LC100 km
Cost / 100 mi18.59 LC100 mi23.94 LC100 mi
Annual fuel used990 L262 US gal218 UK gal1,275 L337 US gal280 UK gal
Annual fuel cost1,733 LC/year2,231 LC/year

Head-to-head comparisons

BMW 4 Series Convertible (G23) M440d

  • Has 14 hp more
  • Has 250 Nm more
  • Is 0.2 s quicker from 0-100 km/h
  • Uses 1.9 L/100 km less fuel
  • Has 282 km (175 mi) more estimated range
  • Has 20 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 2 Series Convertible (F23) M235i

  • Is 380 kg lighter
  • Has 32 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 2 Series Convertible (F23) M235i
Compare selected cars
2 vehicles selected

Popular comparisons

M440d
440i
VS
BMW4 Series Convertible (G23)M440dvsBMW4 Series Convertible (F33)Facelift 2017440i
M235i
M235i
VS
BMW2 Series Convertible (F23)M235ivsBMW2 Series Coupe (F22)M235i
M440d
440i
VS
BMW4 Series Convertible (G23)M440dvsBMW4 Series Convertible (F33)440i
M235i
M235i
VS
BMW2 Series Convertible (F23)M235ivsBMW2 Series Gran Coupe (F44)M235i
M440d
M440d
VS
BMW4 Series Convertible (G23)M440dvsBMW4 Series Coupe (G22)M440d
M235i
M235
VS
BMW2 Series Convertible (F23)M235ivsBMW2 Series Gran Coupe (F74)M235
M440d
M440i
VS
BMW4 Series Convertible (G23)M440dvsBMW4 Series Gran Coupe (G26)M440i
M235i
225i
VS
BMW2 Series Convertible (F23)M235ivsBMW2 Series Active Tourer (F45)225i
M440d
440i
VS
BMW4 Series Convertible (G23)M440dvsBMW4 Series Gran Coupe (F36)Facelift 2017440i
M235i
M240i
VS
BMW2 Series Convertible (F23)M235ivsBMW2 Series Coupe (G42)M240i
M440d
440i
VS
BMW4 Series Convertible (G23)M440dvsBMW4 Series Coupe (F32)Facelift 2017440i
M235i
220i
VS
BMW2 Series Convertible (F23)M235ivsBMW2 Series Gran Tourer (F46)220i
BMW 4 Series Convertible (G23) M440d vs BMW 2 Series Convertible (F23) M235i - car comparison - FastVsFaster