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 hp1997 ccGasolineAWDAutomaticTurbochargedCoupe2013-2016
VS

BMW 4 Series Convertible (F33)

420i

184 hp1997 ccGasolineRWDAutomaticTwin-turboCabriolet / convertible2014-2016

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
    231 km/h
    144 mph
  • Most powerful
    184 hp
    137 kW
  • Highest torque
    270 Nm
    199 lb-ft
  • Lightest
    1,530 kg
    3,373 lb
  • Best power-to-weight
    120 hp/t
    90 kW/t
    8.3 kg/hp
  • Lowest combined fuel consumption
    6.5 L/100 km
    36.2 mpg US
    43.5 mpg UK
  • Lowest city consumption
    8.8 L/100 km
    26.7 mpg US
    32.1 mpg UK
  • Lowest highway consumption
    5.2 L/100 km
    45.2 mpg US
    54.3 mpg UK
  • Lowest CO2 emissions
    152 g/km
  • Best estimated range
    923 km
    574 mi
  • Largest trunk
    445 L
  • Best overall score
    50/100
  • Best performance score
    49/100
  • Best economy score
    89/100
  • 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
1,530kg3,373lb
1,675kg3,693lb
Gross weight
2,050kg4,519lb
2,145kg4,729lb
Top speed
231 km/h
144 mph
230 km/h
143 mph
To 99% top speed
93.5s99% target: 229 km/h / 142 mph
Calculated
106.5s99% target: 228 km/h / 141 mph
Calculated
0-100 km/h
7.5s
8.3s
0-200 km/h
34.4s
Calculated
39.3s
Calculated
0-60 mph
7.1s
Calculated
7.8s
Calculated
Fuel consumption
6.5L/100 km36.2mpg US43.5mpg UK
6.6L/100 km35.6mpg US42.8mpg UK
Fuel consumption city
8.8L/100 km26.7mpg US32.1mpg UK
8.9L/100 km26.4mpg US31.7mpg UK
Fuel consumption highway
5.2L/100 km45.2mpg US54.3mpg UK
5.3L/100 km44.4mpg US53.3mpg UK
Quarter mile
15.4s
Calculated
16.0s
Calculated
Power-to-weight
120hp/t90kW/t55hp/1000 lb
Calculated
110hp/t82kW/t50hp/1000 lb
Calculated
Torque-to-weight
176Nm/t118lb-ft/ton
Calculated
161Nm/t108lb-ft/ton
Calculated
Estimated range
923km574mi
Calculated
909km565mi
Calculated
Displacement
1,997cc122cu in
1,997cc122cu in
Length
4,638mm183in
4,638mm183in
Width
1,825mm72in
1,825mm72in
Height
1,392mm55in
1,384mm54in
Wheelbase
2,810mm111in
2,810mm111in
Front track
1,545mm61in
1,545mm61in
Rear track
1,594mm63in
1,594mm63in
Ground clearance
145mm6in
130mm5in
Trunk volume
445L
370L
Doors
2
2
Seats
4
4
Fuel tank
60L
60L
CO2 emissions
152g/km
154g/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)420i5,000-6,250 rpm1,250-4,500 rpm6,500 rpm
BMW4 Series Convertible (F33)420i5,000-6,250 rpm1,250-4,500 rpm6,500 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
7.8 s
0-100 km/h
0-62 mph
7.5 s
8.3 s
0-200 km/h
0-124 mph
34.4 s
39.3 s
Top speed
231 km/h
144 mph
230 km/h
143 mph
Drag race simulation
60 ft
18 m
2.5 s
2.6 s
330 ft
101 m
6.6 s
6.9 s
1/8 mile
201 m
10.0 s
10.4 s
1000 ft
305 m
13.0 s
13.5 s
1/4 mile
402 m
15.4 s
16.0 s
Trap speed
1/4 mile
402 m
149 km/h
92 mph
143 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
1,530 kg
3,373 lb
BMW4 Series Convertible (F33)420i
1,675 kg
3,693 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
231 km/h
144 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)420i8.3 s

The biggest 0-100 km/h difference is between BMW 4 Series Coupe (F32) 420i and BMW 4 Series Convertible (F33) 420i: 0.8 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
6.5 L/100 km
36.2 mpg US
43.5 mpg UK
BMW4 Series Convertible (F33)420i
6.6 L/100 km
35.6 mpg US
42.8 mpg UK

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
120 hp/t
90 kW/t
8.3 kg/hp
BMW4 Series Convertible (F33)420i
110 hp/t
82 kW/t
9.1 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
923 km
574 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
231 km/h
144 mph
BMW4 Series Convertible (F33)420i
184 hp
137 kW
8.3 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
231 km/h
144 mph
Doors/seats
2 doors
4 seats
Trunk
445 L
15.7 cu ft
Length
4,638 mm
182.6 in
Height
1,392 mm
54.8 in
BMW4 Series Convertible (F33)420i
Power
184 hp
137 kW
0-100 km/h8.3 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
231 km/h
144 mph
6.5 L/100 km
36.2 mpg US
43.5 mpg UK
BMW4 Series Convertible (F33)420i
Power
184 hp
137 kW
0-100 km/h8.3 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
6.5 L/100 km
36.2 mpg US
43.5 mpg UK
7.5 s
BMW4 Series Convertible (F33)420i
6.6 L/100 km
35.6 mpg US
42.8 mpg UK
8.3 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
120 hp/t
90 kW/t
8.3 kg/hp
6.5 L/100 km
36.2 mpg US
43.5 mpg UK
BMW4 Series Convertible (F33)420i
110 hp/t
82 kW/t
9.1 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
8.3 s
Top speed
231 km/h
144 mph
230 km/h
143 mph
Lightness
1,530 kg
3,373 lb
1,675 kg
3,693 lb
Fuel consumption
6.5 L/100 km
36.2 mpg US
43.5 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
1,392 mm
54.8 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
923 km
574 mi
909 km
565 mi
CO2 score
152 g/km
154 g/km
Trunk score
445 L
15.7 cu ft
370 L
13.1 cu ft
Power-to-weight score
120 hp/t
90 kW/t
8.3 kg/hp
110 hp/t
82 kW/t
9.1 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
Consumption6.5 L/100 km36.2 mpg US43.5 mpg UK6.6 L/100 km35.6 mpg US42.8 mpg UK
Cost / 100 km11.38 LC100 km11.55 LC100 km
Cost / 100 mi18.31 LC100 mi18.59 LC100 mi
Annual fuel used975 L258 US gal214 UK gal990 L262 US gal218 UK gal
Annual fuel cost1,706 LC/year1,733 LC/year

Head-to-head comparisons

BMW 4 Series Coupe (F32) 420i

  • Is 145 kg lighter
  • Is 0.8 s quicker from 0-100 km/h
  • Has 1 km/h (1 mph) higher top speed
  • Uses 0.1 L/100 km less fuel
  • Has 10 hp/t better power-to-weight
  • Has 14 km (9 mi) more estimated range
  • Has 75 L more trunk volume
  • Emits 2 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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BMW 4 Series Coupe (F32) 420i vs BMW 4 Series Convertible (F33) 420i - car comparison - FastVsFaster