Car comparison

BMW 4 Series Gran Coupe (F36) 420ivsBMW 4 Series Convertible (F33) · Facelift 2017 420i

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

New comparison

BMW 4 Series Gran Coupe (F36)

420i

184 hp1997 ccGasolineAWDManualTurbochargedCoupe2014-2016
VS

BMW 4 Series Convertible (F33) · Facelift 2017

420i

184 hp1998 ccGasolineRWDManualTurbochargedCabriolet / convertible2017-2020

Comparison overview

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

Best choices

BMW 4 Series Gran Coupe (F36) 420i

  • Quickest 0-100 km/h
    7.6 s
  • Fastest top speed
    233 km/h
    145 mph
  • Most powerful
    184 hp
    137 kW
  • Lightest
    1,570 kg
    3,461 lb
  • Best power-to-weight
    117 hp/t
    87 kW/t
    8.5 kg/hp
  • Largest trunk
    480 L
  • Best overall score
    55/100
  • Best performance score
    49/100
  • Best practicality score
    68/100

BMW 4 Series Convertible (F33) Facelift 2017 420i

  • Highest torque
    290 Nm
    214 lb-ft
  • Lowest combined fuel consumption
    6.6 L/100 km
    35.6 mpg US
    42.8 mpg UK
  • Lowest city consumption
    8.6 L/100 km
    27.4 mpg US
    32.8 mpg UK
  • Lowest highway consumption
    5.5 L/100 km
    42.8 mpg US
    51.4 mpg UK
  • Lowest CO2 emissions
    153 g/km
  • Best estimated range
    909 km
    565 mi
  • Best economy score
    89/100

Specification comparison

Specification comparison
ModelBMW4 Series Gran Coupe (F36)420iBMW4 Series Convertible (F33)Facelift 2017420i
Power
184hp137kW
184hp137kW
Torque
270Nm199lb-ft
290Nm214lb-ft
Curb weight
1,570kg3,461lb
1,700kg3,748lb
Gross weight
2,130kg4,696lb
2,170kg4,784lb
Top speed
233 km/h
145 mph
230 km/h
143 mph
To 99% top speed
97.2s99% target: 231 km/h / 143 mph
Calculated
105.7s99% target: 228 km/h / 141 mph
Calculated
0-100 km/h
7.6s
8.2s
0-200 km/h
34.5s
Calculated
39.0s
Calculated
0-60 mph
7.2s
Calculated
7.7s
Calculated
Fuel consumption
7.1L/100 km33.1mpg US39.8mpg UK
6.6L/100 km35.6mpg US42.8mpg UK
Fuel consumption city
9.3L/100 km25.3mpg US30.4mpg UK
8.6L/100 km27.4mpg US32.8mpg UK
Fuel consumption highway
5.8L/100 km40.6mpg US48.7mpg UK
5.5L/100 km42.8mpg US51.4mpg UK
Quarter mile
15.5s
Calculated
15.9s
Calculated
Power-to-weight
117hp/t87kW/t53hp/1000 lb
Calculated
108hp/t81kW/t49hp/1000 lb
Calculated
Torque-to-weight
172Nm/t115lb-ft/ton
Calculated
171Nm/t114lb-ft/ton
Calculated
Estimated range
845km525mi
Calculated
909km565mi
Calculated
Displacement
1,997cc122cu in
1,998cc122cu in
Length
4,638mm183in
4,640mm183in
Width
1,825mm72in
1,825mm72in
Height
1,404mm55in
1,384mm54in
Wheelbase
2,810mm111in
2,810mm111in
Front track
1,544mm61in
1,544mm61in
Rear track
1,590mm63in
1,593mm63in
Ground clearance
145mm6in
130mm5in
Trunk volume
480L
370L
Max trunk volume
1,300L
-
Doors
5
2
Seats
5
4
Fuel tank
60L
60L
CO2 emissions
164g/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 Gran Coupe (F36) 420iBMW 4 Series Convertible (F33) Facelift 2017 420iPowerTorque
  • BMW 4 Series Gran Coupe (F36) 420i: Power / Torque
  • BMW 4 Series Convertible (F33) Facelift 2017 420i: Power / Torque
Dyno simulation data table
VehiclePeak power RPMPeak torque RPMMax engine speed
BMW4 Series Gran Coupe (F36)420i5,000-6,250 rpm1,250-4,500 rpm6,500 rpm
BMW4 Series Convertible (F33)Facelift 2017420i5,000 rpm1,350-4,600 rpm5,250 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
MetricBMW4 Series Gran Coupe (F36)420iBMW4 Series Convertible (F33)Facelift 2017420i
Acceleration checkpoints
0-60 mph
0-97 km/h
7.2 s
7.7 s
0-100 km/h
0-62 mph
7.6 s
8.2 s
0-200 km/h
0-124 mph
34.5 s
39.0 s
Top speed
233 km/h
145 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
15.5 s
15.9 s
Trap speed
1/4 mile
402 m
148 km/h
92 mph
144 km/h
89 mph

Power comparison

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

Chart data table
VehicleValue
BMW4 Series Gran Coupe (F36)420i
184 hp
137 kW
BMW4 Series Convertible (F33)Facelift 2017420i
184 hp
137 kW

Torque comparison

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

Chart data table
VehicleValue
BMW4 Series Gran Coupe (F36)420i
270 Nm
199 lb-ft
BMW4 Series Convertible (F33)Facelift 2017420i
290 Nm
214 lb-ft

Curb weight comparison

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

Chart data table
VehicleValue
BMW4 Series Gran Coupe (F36)420i
1,570 kg
3,461 lb
BMW4 Series Convertible (F33)Facelift 2017420i
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 Gran Coupe (F36)420i
233 km/h
145 mph
BMW4 Series Convertible (F33)Facelift 2017420i
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 Gran Coupe (F36)420i7.6 s
BMW4 Series Convertible (F33)Facelift 2017420i8.2 s

The biggest 0-100 km/h difference is between BMW 4 Series Gran Coupe (F36) 420i and BMW 4 Series Convertible (F33) Facelift 2017 420i: 0.6 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 Gran Coupe (F36)420i
7.1 L/100 km
33.1 mpg US
39.8 mpg UK
BMW4 Series Convertible (F33)Facelift 2017420i
6.6 L/100 km
35.6 mpg US
42.8 mpg UK

The biggest fuel consumption difference is between BMW 4 Series Convertible (F33) Facelift 2017 420i and BMW 4 Series Gran Coupe (F36) 420i: 0.5 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 Gran Coupe (F36)420i
117 hp/t
87 kW/t
8.5 kg/hp
BMW4 Series Convertible (F33)Facelift 2017420i
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 Gran Coupe (F36)420i
845 km
525 mi
BMW4 Series Convertible (F33)Facelift 2017420i
909 km
565 mi

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
VehiclePowerAccelerationTop speed
BMW4 Series Gran Coupe (F36)420i
184 hp
137 kW
7.6 s
233 km/h
145 mph
BMW4 Series Convertible (F33)Facelift 2017420i
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 Gran Coupe (F36)420i
Power
184 hp
137 kW
0-100 km/h7.6 s
Top speed
233 km/h
145 mph
Doors/seats
5 doors
5 seats
Trunk
480 L
17.0 cu ft
Length
4,638 mm
182.6 in
Height
1,404 mm
55.3 in
BMW4 Series Convertible (F33)Facelift 2017420i
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
4,640 mm
182.7 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 Gran Coupe (F36)420i
Power
184 hp
137 kW
0-100 km/h7.6 s
Top speed
233 km/h
145 mph
7.1 L/100 km
33.1 mpg US
39.8 mpg UK
BMW4 Series Convertible (F33)Facelift 2017420i
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 Gran Coupe (F36) 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 Gran Coupe (F36)420i
7.1 L/100 km
33.1 mpg US
39.8 mpg UK
7.6 s
BMW4 Series Convertible (F33)Facelift 2017420i
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 Gran Coupe (F36)420i
117 hp/t
87 kW/t
8.5 kg/hp
7.1 L/100 km
33.1 mpg US
39.8 mpg UK
BMW4 Series Convertible (F33)Facelift 2017420i
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 Gran Coupe (F36)420iBMW4 Series Convertible (F33)Facelift 2017420i
Power
184 hp
137 kW
184 hp
137 kW
Torque
270 Nm
199 lb-ft
290 Nm
214 lb-ft
Acceleration
7.6 s
8.2 s
Top speed
233 km/h
145 mph
230 km/h
143 mph
Lightness
1,570 kg
3,461 lb
1,700 kg
3,748 lb
Fuel consumption
7.1 L/100 km
33.1 mpg US
39.8 mpg UK
6.6 L/100 km
35.6 mpg US
42.8 mpg UK
Practicality
Doors/seats
5 doors
5 seats
Trunk
480 L
17.0 cu ft
Length
4,638 mm
182.6 in
Height
1,404 mm
55.3 in
Doors/seats
2 doors
4 seats
Trunk
370 L
13.1 cu ft
Length
4,640 mm
182.7 in
Height
1,384 mm
54.5 in
Range score
845 km
525 mi
909 km
565 mi
CO2 score
164 g/km
153 g/km
Trunk score
480 L
17.0 cu ft
370 L
13.1 cu ft
Power-to-weight score
117 hp/t
87 kW/t
8.5 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 Gran Coupe (F36) 420iBMW 4 Series Convertible (F33) Facelift 2017 420i
Consumption7.1 L/100 km33.1 mpg US39.8 mpg UK6.6 L/100 km35.6 mpg US42.8 mpg UK
Cost / 100 km12.42 LC100 km11.55 LC100 km
Cost / 100 mi20.00 LC100 mi18.59 LC100 mi
Annual fuel used1,065 L281 US gal234 UK gal990 L262 US gal218 UK gal
Annual fuel cost1,864 LC/year1,733 LC/year

Head-to-head comparisons

BMW 4 Series Gran Coupe (F36) 420i

  • Is 130 kg lighter
  • Is 0.6 s quicker from 0-100 km/h
  • Has 3 km/h (2 mph) higher top speed
  • Has 9 hp/t better power-to-weight
  • Has 110 L more trunk volume

Pros

  • Quickest 0-100 km/h in this comparison
  • Highest top speed
  • Most powerful
  • Lightest
  • Best power-to-weight ratio
  • Largest trunk

Cons

  • Highest combined fuel consumption
  • Highest CO2 emissions

BMW 4 Series Convertible (F33) Facelift 2017 420i

  • Has 20 Nm more
  • Uses 0.5 L/100 km less fuel
  • Has 64 km (40 mi) more estimated range
  • Emits 11 g/km less CO2

Pros

  • Highest torque
  • Lowest combined fuel consumption
  • Best estimated range

Cons

  • Slowest 0-100 km/h
  • Heaviest
  • Lowest top speed
  • Smallest trunk

Choose cars to compare

Brand
Model
Generation
Engine or modification
BMW 4 Series Gran Coupe (F36) 420i
BMW 4 Series Convertible (F33) 420i
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