Car comparison

BMW 4 Series Coupe (F32) 420ivsBMW 4 Series Convertible (F33) 420i

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

New comparison

BMW 4 Series Coupe (F32)

420i

184 hp1998 ccGasolineRWDAutomaticTurbochargedCoupe2016-2016
VS

BMW 4 Series Convertible (F33)

420i

184 hp1998 ccGasolineRWDManualTurbochargedCabriolet / convertible2016-2016

Comparison overview

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

Best choices

BMW 4 Series Coupe (F32) 420i

  • Quickest 0-100 km/h
    7.5 s
  • Fastest top speed
    236 km/h
    147 mph
  • Most powerful
    184 hp
    137 kW
  • Highest torque
    270 Nm
    199 lb-ft
  • Lightest
    1,495 kg
    3,296 lb
  • Best power-to-weight
    123 hp/t
    92 kW/t
    8.1 kg/hp
  • Lowest combined fuel consumption
    5.8 L/100 km
    40.6 mpg US
    48.7 mpg UK
  • Lowest city consumption
    7.6 L/100 km
    30.9 mpg US
    37.2 mpg UK
  • Lowest highway consumption
    4.7 L/100 km
    50.0 mpg US
    60.1 mpg UK
  • Lowest CO2 emissions
    134 g/km
  • Best estimated range
    1,034 km
    643 mi
  • Largest trunk
    445 L
  • Best overall score
    51/100
  • Best performance score
    50/100
  • Best economy score
    91/100
  • Best practicality score
    53/100

Specification comparison

Specification comparison
ModelBMW4 Series Coupe (F32)420iBMW4 Series Convertible (F33)420i
Power
184hp137kW
184hp137kW
Torque
270Nm199lb-ft
270Nm199lb-ft
Curb weight
1,495kg3,296lb
1,700kg3,748lb
Gross weight
2,015kg4,442lb
2,170kg4,784lb
Top speed
236 km/h
147 mph
230 km/h
143 mph
To 99% top speed
94.3s99% target: 234 km/h / 145 mph
Calculated
105.7s99% target: 228 km/h / 141 mph
Calculated
0-100 km/h
7.5s
8.2s
0-200 km/h
32.4s
Calculated
39.0s
Calculated
0-60 mph
7.1s
Calculated
7.7s
Calculated
Fuel consumption
5.8L/100 km40.6mpg US48.7mpg UK
6.6L/100 km35.6mpg US42.8mpg UK
Fuel consumption city
7.6L/100 km30.9mpg US37.2mpg UK
8.6L/100 km27.4mpg US32.8mpg UK
Fuel consumption highway
4.7L/100 km50mpg US60.1mpg UK
5.5L/100 km42.8mpg US51.4mpg UK
Quarter mile
15.4s
Calculated
15.9s
Calculated
Power-to-weight
123hp/t92kW/t56hp/1000 lb
Calculated
108hp/t81kW/t49hp/1000 lb
Calculated
Torque-to-weight
181Nm/t121lb-ft/ton
Calculated
159Nm/t106lb-ft/ton
Calculated
Estimated range
1,034km643mi
Calculated
909km565mi
Calculated
Displacement
1,998cc122cu in
1,998cc122cu in
Length
4,638mm183in
4,638mm183in
Width
1,825mm72in
1,825mm72in
Height
1,377mm54in
1,384mm54in
Wheelbase
2,810mm111in
2,810mm111in
Front track
1,545mm61in
1,545mm61in
Rear track
1,594mm63in
1,594mm63in
Ground clearance
130mm5in
130mm5in
Trunk volume
445L
370L
Doors
2
2
Seats
4
4
Fuel tank
60L
60L
CO2 emissions
134g/km
153g/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 Coupe (F32) 420iBMW 4 Series Convertible (F33) 420iPowerTorque
  • BMW 4 Series Coupe (F32) 420i: Power / Torque
  • BMW 4 Series Convertible (F33) 420i: Power / Torque
Dyno simulation data table
VehiclePeak power RPMPeak torque RPMMax engine speed
BMW4 Series Coupe (F32)420i5,000 rpm1,350-4,600 rpm5,250 rpm
BMW4 Series Convertible (F33)420i5,000 rpm1,350-4,600 rpm5,250 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
MetricBMW4 Series Coupe (F32)420iBMW4 Series Convertible (F33)420i
Acceleration checkpoints
0-60 mph
0-97 km/h
7.1 s
7.7 s
0-100 km/h
0-62 mph
7.5 s
8.2 s
0-200 km/h
0-124 mph
32.4 s
39.0 s
Top speed
236 km/h
147 mph
230 km/h
143 mph
Drag race simulation
60 ft
18 m
2.5 s
2.5 s
330 ft
101 m
6.7 s
6.8 s
1/8 mile
201 m
10.1 s
10.4 s
1000 ft
305 m
13.0 s
13.4 s
1/4 mile
402 m
15.4 s
15.9 s
Trap speed
1/4 mile
402 m
150 km/h
93 mph
144 km/h
89 mph

Power comparison

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

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

Torque comparison

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

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

Curb weight comparison

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

Chart data table
VehicleValue
BMW4 Series Coupe (F32)420i
1,495 kg
3,296 lb
BMW4 Series Convertible (F33)420i
1,700 kg
3,748 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 Coupe (F32)420i
236 km/h
147 mph
BMW4 Series Convertible (F33)420i
230 km/h
143 mph

0-100 km/h comparison

Bar comparison chart for 0-100 km/h. Lower is better · seconds

Chart data table
VehicleValue
BMW4 Series Coupe (F32)420i7.5 s
BMW4 Series Convertible (F33)420i8.2 s

The biggest 0-100 km/h difference is between BMW 4 Series Coupe (F32) 420i and BMW 4 Series Convertible (F33) 420i: 0.7 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 Coupe (F32)420i
5.8 L/100 km
40.6 mpg US
48.7 mpg UK
BMW4 Series Convertible (F33)420i
6.6 L/100 km
35.6 mpg US
42.8 mpg UK

The biggest fuel consumption difference is between BMW 4 Series Coupe (F32) 420i and BMW 4 Series Convertible (F33) 420i: 0.8 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 Coupe (F32)420i
123 hp/t
92 kW/t
8.1 kg/hp
BMW4 Series Convertible (F33)420i
108 hp/t
81 kW/t
9.2 kg/hp

Estimated range comparison

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

Chart data table
VehicleValue
BMW4 Series Coupe (F32)420i
1,034 km
643 mi
BMW4 Series Convertible (F33)420i
909 km
565 mi

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
VehiclePowerAccelerationTop speed
BMW4 Series Coupe (F32)420i
184 hp
137 kW
7.5 s
236 km/h
147 mph
BMW4 Series Convertible (F33)420i
184 hp
137 kW
8.2 s
230 km/h
143 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 Coupe (F32)420i
Power
184 hp
137 kW
0-100 km/h7.5 s
Top speed
236 km/h
147 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
BMW4 Series Convertible (F33)420i
Power
184 hp
137 kW
0-100 km/h8.2 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

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 Coupe (F32)420i
Power
184 hp
137 kW
0-100 km/h7.5 s
Top speed
236 km/h
147 mph
5.8 L/100 km
40.6 mpg US
48.7 mpg UK
BMW4 Series Convertible (F33)420i
Power
184 hp
137 kW
0-100 km/h8.2 s
Top speed
230 km/h
143 mph
6.6 L/100 km
35.6 mpg US
42.8 mpg UK

BMW 4 Series Coupe (F32) 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 Coupe (F32)420i
5.8 L/100 km
40.6 mpg US
48.7 mpg UK
7.5 s
BMW4 Series Convertible (F33)420i
6.6 L/100 km
35.6 mpg US
42.8 mpg UK
8.2 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 Coupe (F32)420i
123 hp/t
92 kW/t
8.1 kg/hp
5.8 L/100 km
40.6 mpg US
48.7 mpg UK
BMW4 Series Convertible (F33)420i
108 hp/t
81 kW/t
9.2 kg/hp
6.6 L/100 km
35.6 mpg US
42.8 mpg UK

Detailed score breakdown

Detailed score breakdown
VehicleBMW4 Series Coupe (F32)420iBMW4 Series Convertible (F33)420i
Power
184 hp
137 kW
184 hp
137 kW
Torque
270 Nm
199 lb-ft
270 Nm
199 lb-ft
Acceleration
7.5 s
8.2 s
Top speed
236 km/h
147 mph
230 km/h
143 mph
Lightness
1,495 kg
3,296 lb
1,700 kg
3,748 lb
Fuel consumption
5.8 L/100 km
40.6 mpg US
48.7 mpg UK
6.6 L/100 km
35.6 mpg US
42.8 mpg UK
Practicality
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
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
Range score
1,034 km
643 mi
909 km
565 mi
CO2 score
134 g/km
153 g/km
Trunk score
445 L
15.7 cu ft
370 L
13.1 cu ft
Power-to-weight score
123 hp/t
92 kW/t
8.1 kg/hp
108 hp/t
81 kW/t
9.2 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 Coupe (F32) 420iBMW 4 Series Convertible (F33) 420i
Consumption5.8 L/100 km40.6 mpg US48.7 mpg UK6.6 L/100 km35.6 mpg US42.8 mpg UK
Cost / 100 km10.15 LC100 km11.55 LC100 km
Cost / 100 mi16.33 LC100 mi18.59 LC100 mi
Annual fuel used870 L230 US gal191 UK gal990 L262 US gal218 UK gal
Annual fuel cost1,523 LC/year1,733 LC/year

Head-to-head comparisons

BMW 4 Series Coupe (F32) 420i

  • Is 205 kg lighter
  • Is 0.7 s quicker from 0-100 km/h
  • Has 6 km/h (4 mph) higher top speed
  • Uses 0.8 L/100 km less fuel
  • Has 15 hp/t better power-to-weight
  • Has 125 km (78 mi) more estimated range
  • Has 75 L more trunk volume
  • Emits 19 g/km less CO2

Pros

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

BMW 4 Series Convertible (F33) 420i

No measurable advantages in the available data.

Cons

  • Slowest 0-100 km/h
  • Highest combined fuel consumption
  • Heaviest
  • Lowest top speed
  • Smallest trunk
  • Highest CO2 emissions

Choose cars to compare

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