Car comparison

BMW 4 Series Convertible (F33) 420ivsBMW 4 Series Coupe (F32) 418d

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

New comparison

BMW 4 Series Convertible (F33)

420i

184 hp1998 ccGasolineRWDAutomaticTurbochargedCabriolet / convertible2016-2016
VS

BMW 4 Series Coupe (F32)

418d

150 hp1995 ccDieselRWDAutomaticTurbochargedCoupe2015-2016

Comparison overview

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

Best choices

BMW 4 Series Coupe (F32) 418d

  • Highest torque
    320 Nm
    236 lb-ft
  • Lightest
    1,485 kg
    3,274 lb
  • Lowest combined fuel consumption
    4.4 L/100 km
    53.5 mpg US
    64.2 mpg UK
  • Lowest city consumption
    5.3 L/100 km
    44.4 mpg US
    53.3 mpg UK
  • Lowest highway consumption
    3.9 L/100 km
    60.3 mpg US
    72.4 mpg UK
  • Lowest CO2 emissions
    117 g/km
  • Best estimated range
    1,295 km
    805 mi
  • Largest trunk
    445 L
  • Best overall score
    47/100
  • Best economy score
    95/100
  • Best practicality score
    53/100

BMW 4 Series Convertible (F33) 420i

  • Quickest 0-100 km/h
    8.4 s
  • Fastest top speed
    230 km/h
    143 mph
  • Most powerful
    184 hp
    137 kW
  • Best power-to-weight
    107 hp/t
    80 kW/t
    9.3 kg/hp
  • Best performance score
    46/100

Specification comparison

Specification comparison
ModelBMW4 Series Convertible (F33)420iBMW4 Series Coupe (F32)418d
Power
184hp137kW
150hp112kW
Torque
270Nm199lb-ft
320Nm236lb-ft
Curb weight
1,715kg3,781lb
1,485kg3,274lb
Gross weight
2,185kg4,817lb
2,005kg4,420lb
Top speed
230 km/h
143 mph
213 km/h
132 mph
To 99% top speed
108.6s99% target: 228 km/h / 141 mph
Calculated
93.0s99% target: 211 km/h / 131 mph
Calculated
0-100 km/h
8.4s
8.6s
0-200 km/h
40.0s
Calculated
51.1s
Calculated
0-60 mph
7.9s
Calculated
8.1s
Calculated
Fuel consumption
6.2L/100 km37.9mpg US45.6mpg UK
4.4L/100 km53.5mpg US64.2mpg UK
Fuel consumption city
8.1L/100 km29mpg US34.9mpg UK
5.3L/100 km44.4mpg US53.3mpg UK
Fuel consumption highway
5.1L/100 km46.1mpg US55.4mpg UK
3.9L/100 km60.3mpg US72.4mpg UK
Quarter mile
16.1s
Calculated
16.2s
Calculated
Power-to-weight
107hp/t80kW/t49hp/1000 lb
Calculated
101hp/t75kW/t46hp/1000 lb
Calculated
Torque-to-weight
157Nm/t105lb-ft/ton
Calculated
215Nm/t144lb-ft/ton
Calculated
Estimated range
968km601mi
Calculated
1,295km805mi
Calculated
Displacement
1,998cc122cu in
1,995cc122cu in
Length
4,638mm183in
4,638mm183in
Width
1,825mm72in
1,825mm72in
Height
1,384mm54in
1,377mm54in
Wheelbase
2,810mm111in
2,810mm111in
Front track
1,545mm61in
1,545mm61in
Rear track
1,594mm63in
1,594mm63in
Ground clearance
130mm5in
130mm5in
Trunk volume
370L
445L
Doors
2
2
Seats
4
4
Fuel tank
60L
57L
CO2 emissions
144g/km
117g/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) 420iBMW 4 Series Coupe (F32) 418dPowerTorque
  • BMW 4 Series Convertible (F33) 420i: Power / Torque
  • BMW 4 Series Coupe (F32) 418d: Power / Torque
Dyno simulation data table
VehiclePeak power RPMPeak torque RPMMax engine speed
BMW4 Series Convertible (F33)420i5,000 rpm1,350-4,600 rpm5,250 rpm
BMW4 Series Coupe (F32)418d4,000 rpm1,500-3,000 rpm4,250 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
MetricBMW4 Series Convertible (F33)420iBMW4 Series Coupe (F32)418d
Acceleration checkpoints
0-60 mph
0-97 km/h
7.9 s
8.1 s
0-100 km/h
0-62 mph
8.4 s
8.6 s
0-200 km/h
0-124 mph
40.0 s
51.1 s
Top speed
230 km/h
143 mph
213 km/h
132 mph
Drag race simulation
60 ft
18 m
2.6 s
2.6 s
330 ft
101 m
6.9 s
7.0 s
1/8 mile
201 m
10.5 s
10.6 s
1000 ft
305 m
13.5 s
13.6 s
1/4 mile
402 m
16.1 s
16.2 s
Trap speed
1/4 mile
402 m
143 km/h
89 mph
140 km/h
87 mph

Power comparison

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

Chart data table
VehicleValue
BMW4 Series Convertible (F33)420i
184 hp
137 kW
BMW4 Series Coupe (F32)418d
150 hp
112 kW

BMW 4 Series Convertible (F33) 420i has 34 hp more than BMW 4 Series Coupe (F32) 418d.

The biggest power difference is between BMW 4 Series Coupe (F32) 418d and BMW 4 Series Convertible (F33) 420i: 34 hp (25 kW).

Torque comparison

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

Chart data table
VehicleValue
BMW4 Series Convertible (F33)420i
270 Nm
199 lb-ft
BMW4 Series Coupe (F32)418d
320 Nm
236 lb-ft

Curb weight comparison

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

Chart data table
VehicleValue
BMW4 Series Convertible (F33)420i
1,715 kg
3,781 lb
BMW4 Series Coupe (F32)418d
1,485 kg
3,274 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 (F33)420i
230 km/h
143 mph
BMW4 Series Coupe (F32)418d
213 km/h
132 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 (F33)420i8.4 s
BMW4 Series Coupe (F32)418d8.6 s

The biggest 0-100 km/h difference is between BMW 4 Series Convertible (F33) 420i and BMW 4 Series Coupe (F32) 418d: 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 (F33)420i
6.2 L/100 km
37.9 mpg US
45.6 mpg UK
BMW4 Series Coupe (F32)418d
4.4 L/100 km
53.5 mpg US
64.2 mpg UK

The biggest fuel consumption difference is between BMW 4 Series Coupe (F32) 418d and BMW 4 Series Convertible (F33) 420i: 1.8 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 (F33)420i
107 hp/t
80 kW/t
9.3 kg/hp
BMW4 Series Coupe (F32)418d
101 hp/t
75 kW/t
9.9 kg/hp

Estimated range comparison

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

Chart data table
VehicleValue
BMW4 Series Convertible (F33)420i
968 km
601 mi
BMW4 Series Coupe (F32)418d
1,295 km
805 mi

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
VehiclePowerAccelerationTop speed
BMW4 Series Convertible (F33)420i
184 hp
137 kW
8.4 s
230 km/h
143 mph
BMW4 Series Coupe (F32)418d
150 hp
112 kW
8.6 s
213 km/h
132 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 (F33)420i
Power
184 hp
137 kW
0-100 km/h8.4 s
Top speed
230 km/h
143 mph
Doors/seats
2 doors
4 seats
Trunk
370 L
13.1 cu ft
Length
4,638 mm
182.6 in
Height
1,384 mm
54.5 in
BMW4 Series Coupe (F32)418d
Power
150 hp
112 kW
0-100 km/h8.6 s
Top speed
213 km/h
132 mph
Doors/seats
2 doors
4 seats
Trunk
445 L
15.7 cu ft
Length
4,638 mm
182.6 in
Height
1,377 mm
54.2 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 (F33)420i
Power
184 hp
137 kW
0-100 km/h8.4 s
Top speed
230 km/h
143 mph
6.2 L/100 km
37.9 mpg US
45.6 mpg UK
BMW4 Series Coupe (F32)418d
Power
150 hp
112 kW
0-100 km/h8.6 s
Top speed
213 km/h
132 mph
4.4 L/100 km
53.5 mpg US
64.2 mpg UK

BMW 4 Series Convertible (F33) 420i 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 (F33)420i
6.2 L/100 km
37.9 mpg US
45.6 mpg UK
8.4 s
BMW4 Series Coupe (F32)418d
4.4 L/100 km
53.5 mpg US
64.2 mpg UK
8.6 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 (F33)420i
107 hp/t
80 kW/t
9.3 kg/hp
6.2 L/100 km
37.9 mpg US
45.6 mpg UK
BMW4 Series Coupe (F32)418d
101 hp/t
75 kW/t
9.9 kg/hp
4.4 L/100 km
53.5 mpg US
64.2 mpg UK

Detailed score breakdown

Detailed score breakdown
VehicleBMW4 Series Convertible (F33)420iBMW4 Series Coupe (F32)418d
Power
184 hp
137 kW
150 hp
112 kW
Torque
270 Nm
199 lb-ft
320 Nm
236 lb-ft
Acceleration
8.4 s
8.6 s
Top speed
230 km/h
143 mph
213 km/h
132 mph
Lightness
1,715 kg
3,781 lb
1,485 kg
3,274 lb
Fuel consumption
6.2 L/100 km
37.9 mpg US
45.6 mpg UK
4.4 L/100 km
53.5 mpg US
64.2 mpg UK
Practicality
Doors/seats
2 doors
4 seats
Trunk
370 L
13.1 cu ft
Length
4,638 mm
182.6 in
Height
1,384 mm
54.5 in
Doors/seats
2 doors
4 seats
Trunk
445 L
15.7 cu ft
Length
4,638 mm
182.6 in
Height
1,377 mm
54.2 in
Range score
968 km
601 mi
1,295 km
805 mi
CO2 score
144 g/km
117 g/km
Trunk score
370 L
13.1 cu ft
445 L
15.7 cu ft
Power-to-weight score
107 hp/t
80 kW/t
9.3 kg/hp
101 hp/t
75 kW/t
9.9 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 (F33) 420iBMW 4 Series Coupe (F32) 418d
Consumption6.2 L/100 km37.9 mpg US45.6 mpg UK4.4 L/100 km53.5 mpg US64.2 mpg UK
Cost / 100 km10.85 LC100 km7.70 LC100 km
Cost / 100 mi17.46 LC100 mi12.39 LC100 mi
Annual fuel used930 L246 US gal205 UK gal660 L174 US gal145 UK gal
Annual fuel cost1,628 LC/year1,155 LC/year

Head-to-head comparisons

BMW 4 Series Convertible (F33) 420i

  • Has 34 hp more
  • Is 0.2 s quicker from 0-100 km/h
  • Has 17 km/h (11 mph) higher top speed
  • Has 6 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 Coupe (F32) 418d

  • Has 50 Nm more
  • Is 230 kg lighter
  • Uses 1.8 L/100 km less fuel
  • Has 328 km (204 mi) more estimated range
  • Has 75 L more trunk volume
  • Emits 27 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
  • Lowest top speed

Choose cars to compare

Brand
Model
Generation
Engine or modification
BMW 4 Series Convertible (F33) 420i
BMW 4 Series Coupe (F32) 418d
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