Car comparison

BMW 4 Series Gran Coupe (F36) · Facelift 2017 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 Gran Coupe (F36) · Facelift 2017

420i

184 hp1998 ccGasolineAWDManualTurbochargedCoupe2017-2021
VS

BMW 4 Series Convertible (F33)

420i

184 hp1997 ccGasolineRWDManualTurbochargedCabriolet / convertible2014-2016

Comparison overview

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

Best choices

BMW 4 Series Gran Coupe (F36) Facelift 2017 420i

  • Quickest 0-100 km/h
    7.8 s
  • Fastest top speed
    233 km/h
    145 mph
  • Most powerful
    184 hp
    137 kW
  • Highest torque
    270 Nm
    199 lb-ft
  • Lightest
    1,600 kg
    3,527 lb
  • Best power-to-weight
    115 hp/t
    86 kW/t
    8.7 kg/hp
  • Lowest city consumption
    9.0 L/100 km
    26.1 mpg US
    31.4 mpg UK
  • Largest trunk
    480 L
  • Best overall score
    53/100
  • Best performance score
    48/100
  • Best practicality score
    65/100

BMW 4 Series Convertible (F33) 420i

  • Lowest combined fuel consumption
    6.8 L/100 km
    34.6 mpg US
    41.5 mpg UK
  • Lowest highway consumption
    5.4 L/100 km
    43.6 mpg US
    52.3 mpg UK
  • Lowest CO2 emissions
    159 g/km
  • Best estimated range
    882 km
    548 mi
  • Best economy score
    89/100

Specification comparison

Specification comparison
ModelBMW4 Series Gran Coupe (F36)Facelift 2017420iBMW4 Series Convertible (F33)420i
Power
184hp137kW
184hp137kW
Torque
270Nm199lb-ft
270Nm199lb-ft
Curb weight
1,600kg3,527lb
1,650kg3,638lb
Gross weight
2,160kg4,762lb
2,120kg4,674lb
Top speed
233 km/h
145 mph
230 km/h
143 mph
To 99% top speed
100.4s99% target: 231 km/h / 143 mph
Calculated
104.6s99% target: 228 km/h / 141 mph
Calculated
0-100 km/h
7.8s
8.2s
0-200 km/h
35.5s
Calculated
38.7s
Calculated
0-60 mph
7.4s
Calculated
7.7s
Calculated
Fuel consumption
6.9L/100 km34.1mpg US40.9mpg UK
6.8L/100 km34.6mpg US41.5mpg UK
Fuel consumption city
9L/100 km26.1mpg US31.4mpg UK
9.3L/100 km25.3mpg US30.4mpg UK
Fuel consumption highway
5.7L/100 km41.3mpg US49.6mpg UK
5.4L/100 km43.6mpg US52.3mpg UK
Quarter mile
15.6s
Calculated
15.9s
Calculated
Power-to-weight
115hp/t86kW/t52hp/1000 lb
Calculated
112hp/t83kW/t51hp/1000 lb
Calculated
Torque-to-weight
169Nm/t113lb-ft/ton
Calculated
164Nm/t109lb-ft/ton
Calculated
Estimated range
870km540mi
Calculated
882km548mi
Calculated
Displacement
1,998cc122cu in
1,997cc122cu in
Length
4,640mm183in
4,638mm183in
Width
1,825mm72in
1,825mm72in
Height
1,404mm55in
1,384mm54in
Wheelbase
2,810mm111in
2,810mm111in
Front track
1,543mm61in
1,545mm61in
Rear track
1,592mm63in
1,594mm63in
Ground clearance
145mm6in
130mm5in
Trunk volume
480L
370L
Max trunk volume
1,300L
-
Doors
4
2
Seats
5
4
Fuel tank
60L
60L
CO2 emissions
161g/km
159g/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) Facelift 2017 420iBMW 4 Series Convertible (F33) 420iPowerTorque
  • BMW 4 Series Gran Coupe (F36) Facelift 2017 420i: Power / Torque
  • BMW 4 Series Convertible (F33) 420i: Power / Torque
Dyno simulation data table
VehiclePeak power RPMPeak torque RPMMax engine speed
BMW4 Series Gran Coupe (F36)Facelift 2017420i5,000 rpm1,350-4,600 rpm5,250 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 Gran Coupe (F36)Facelift 2017420iBMW4 Series Convertible (F33)420i
Acceleration checkpoints
0-60 mph
0-97 km/h
7.4 s
7.7 s
0-100 km/h
0-62 mph
7.8 s
8.2 s
0-200 km/h
0-124 mph
35.5 s
38.7 s
Top speed
233 km/h
145 mph
230 km/h
143 mph
Drag race simulation
60 ft
18 m
2.5 s
2.6 s
330 ft
101 m
6.7 s
6.9 s
1/8 mile
201 m
10.2 s
10.4 s
1000 ft
305 m
13.1 s
13.4 s
1/4 mile
402 m
15.6 s
15.9 s
Trap speed
1/4 mile
402 m
147 km/h
91 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)Facelift 2017420i
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 Gran Coupe (F36)Facelift 2017420i
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 Gran Coupe (F36)Facelift 2017420i
1,600 kg
3,527 lb
BMW4 Series Convertible (F33)420i
1,650 kg
3,638 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)Facelift 2017420i
233 km/h
145 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 Gran Coupe (F36)Facelift 2017420i7.8 s
BMW4 Series Convertible (F33)420i8.2 s

The biggest 0-100 km/h difference is between BMW 4 Series Gran Coupe (F36) Facelift 2017 420i and BMW 4 Series Convertible (F33) 420i: 0.4 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)Facelift 2017420i
6.9 L/100 km
34.1 mpg US
40.9 mpg UK
BMW4 Series Convertible (F33)420i
6.8 L/100 km
34.6 mpg US
41.5 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 Gran Coupe (F36)Facelift 2017420i
115 hp/t
86 kW/t
8.7 kg/hp
BMW4 Series Convertible (F33)420i
112 hp/t
83 kW/t
9.0 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)Facelift 2017420i
870 km
540 mi
BMW4 Series Convertible (F33)420i
882 km
548 mi

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
VehiclePowerAccelerationTop speed
BMW4 Series Gran Coupe (F36)Facelift 2017420i
184 hp
137 kW
7.8 s
233 km/h
145 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 Gran Coupe (F36)Facelift 2017420i
Power
184 hp
137 kW
0-100 km/h7.8 s
Top speed
233 km/h
145 mph
Doors/seats
4 doors
5 seats
Trunk
480 L
17.0 cu ft
Length
4,640 mm
182.7 in
Height
1,404 mm
55.3 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 Gran Coupe (F36)Facelift 2017420i
Power
184 hp
137 kW
0-100 km/h7.8 s
Top speed
233 km/h
145 mph
6.9 L/100 km
34.1 mpg US
40.9 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
6.8 L/100 km
34.6 mpg US
41.5 mpg UK

BMW 4 Series Gran Coupe (F36) Facelift 2017 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)Facelift 2017420i
6.9 L/100 km
34.1 mpg US
40.9 mpg UK
7.8 s
BMW4 Series Convertible (F33)420i
6.8 L/100 km
34.6 mpg US
41.5 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)Facelift 2017420i
115 hp/t
86 kW/t
8.7 kg/hp
6.9 L/100 km
34.1 mpg US
40.9 mpg UK
BMW4 Series Convertible (F33)420i
112 hp/t
83 kW/t
9.0 kg/hp
6.8 L/100 km
34.6 mpg US
41.5 mpg UK

Detailed score breakdown

Detailed score breakdown
VehicleBMW4 Series Gran Coupe (F36)Facelift 2017420iBMW4 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
7.8 s
8.2 s
Top speed
233 km/h
145 mph
230 km/h
143 mph
Lightness
1,600 kg
3,527 lb
1,650 kg
3,638 lb
Fuel consumption
6.9 L/100 km
34.1 mpg US
40.9 mpg UK
6.8 L/100 km
34.6 mpg US
41.5 mpg UK
Practicality
Doors/seats
4 doors
5 seats
Trunk
480 L
17.0 cu ft
Length
4,640 mm
182.7 in
Height
1,404 mm
55.3 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
870 km
540 mi
882 km
548 mi
CO2 score
161 g/km
159 g/km
Trunk score
480 L
17.0 cu ft
370 L
13.1 cu ft
Power-to-weight score
115 hp/t
86 kW/t
8.7 kg/hp
112 hp/t
83 kW/t
9.0 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) Facelift 2017 420iBMW 4 Series Convertible (F33) 420i
Consumption6.9 L/100 km34.1 mpg US40.9 mpg UK6.8 L/100 km34.6 mpg US41.5 mpg UK
Cost / 100 km12.08 LC100 km11.90 LC100 km
Cost / 100 mi19.43 LC100 mi19.15 LC100 mi
Annual fuel used1,035 L273 US gal228 UK gal1,020 L269 US gal224 UK gal
Annual fuel cost1,811 LC/year1,785 LC/year

Head-to-head comparisons

BMW 4 Series Gran Coupe (F36) Facelift 2017 420i

  • Is 50 kg lighter
  • Is 0.4 s quicker from 0-100 km/h
  • Has 3 km/h (2 mph) higher top speed
  • Has 3 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
  • Highest torque
  • Lightest
  • Best power-to-weight ratio
  • Largest trunk

Cons

  • Highest combined fuel consumption
  • Highest CO2 emissions

BMW 4 Series Convertible (F33) 420i

  • Uses 0.1 L/100 km less fuel
  • Has 13 km (8 mi) more estimated range
  • Emits 2 g/km less CO2

Pros

  • 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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