Car comparison

BMW 4 Series Convertible (F33) 420ivsBMW 4 Series Gran Coupe (G26) 420i

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

New comparison

BMW 4 Series Convertible (F33)

420i

184 hp1998 ccGasolineRWDManualTurbochargedCabriolet / convertible2016-2016
VS

BMW 4 Series Gran Coupe (G26)

420i

170 hp1597 ccGasolineRWDAutomaticTurbochargedCoupe2021-2024

Comparison overview

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

Best choices

BMW 4 Series Convertible (F33) 420i

  • Quickest 0-100 km/h
    8.2 s
  • Fastest top speed
    230 km/h
    143 mph
  • Most powerful
    184 hp
    137 kW
  • Highest torque
    270 Nm
    199 lb-ft
  • Best power-to-weight
    108 hp/t
    81 kW/t
    9.2 kg/hp
  • Lowest combined fuel consumption
    6.6 L/100 km
    35.6 mpg US
    42.8 mpg UK
  • Lowest highway consumption
    5.5 L/100 km
    42.8 mpg US
    51.4 mpg UK
  • Best estimated range
    909 km
    565 mi
  • Best performance score
    46/100
  • Best economy score
    89/100

BMW 4 Series Gran Coupe (G26) 420i

  • Lightest
    1,620 kg
    3,571 lb
  • Lowest city consumption
    8.0 L/100 km
    29.4 mpg US
    35.3 mpg UK
  • Largest trunk
    470 L
  • Best overall score
    53/100
  • Best practicality score
    69/100

Specification comparison

Specification comparison
ModelBMW4 Series Convertible (F33)420iBMW4 Series Gran Coupe (G26)420i
Power
184hp137kW
170hp127kW
Torque
270Nm199lb-ft
250Nm184lb-ft
Curb weight
1,700kg3,748lb
1,620kg3,571lb
Gross weight
2,170kg4,784lb
2,175kg4,795lb
Top speed
230 km/h
143 mph
227 km/h
141 mph
To 99% top speed
105.7s99% target: 228 km/h / 141 mph
Calculated
105.0s99% target: 225 km/h / 140 mph
Calculated
0-100 km/h
8.2s
8.6s
0-200 km/h
39.0s
Calculated
41.4s
Calculated
0-60 mph
7.7s
Calculated
8.1s
Calculated
Fuel consumption
6.6L/100 km35.6mpg US42.8mpg UK
8.1L/100 km29mpg US34.9mpg UK
Fuel consumption city
8.6L/100 km27.4mpg US32.8mpg UK
8L/100 km29.4mpg US35.3mpg UK
Fuel consumption highway
5.5L/100 km42.8mpg US51.4mpg UK
7L/100 km33.6mpg US40.4mpg UK
Quarter mile
15.9s
Calculated
16.2s
Calculated
Power-to-weight
108hp/t81kW/t49hp/1000 lb
Calculated
105hp/t78kW/t48hp/1000 lb
Calculated
Torque-to-weight
159Nm/t106lb-ft/ton
Calculated
154Nm/t103lb-ft/ton
Calculated
Estimated range
909km565mi
Calculated
728km453mi
Calculated
Displacement
1,998cc122cu in
1,597cc97cu in
Length
4,638mm183in
4,783mm188in
Width
1,825mm72in
1,852mm73in
Height
1,384mm54in
1,442mm57in
Wheelbase
2,810mm111in
2,856mm112in
Front track
1,545mm61in
1,595mm63in
Rear track
1,594mm63in
1,623mm64in
Ground clearance
130mm5in
-
Trunk volume
370L
470L
Max trunk volume-
1,290L
Doors
2
5
Seats
4
5
Fuel tank
60L
59L
CO2 emissions
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 Convertible (F33) 420iBMW 4 Series Gran Coupe (G26) 420iPowerTorque
  • BMW 4 Series Convertible (F33) 420i: Power / Torque
  • BMW 4 Series Gran Coupe (G26) 420i: 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 Gran Coupe (G26)420i5,000-5,500 rpm2,000-4,400 rpm5,750 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
MetricBMW4 Series Convertible (F33)420iBMW4 Series Gran Coupe (G26)420i
Acceleration checkpoints
0-60 mph
0-97 km/h
7.7 s
8.1 s
0-100 km/h
0-62 mph
8.2 s
8.6 s
0-200 km/h
0-124 mph
39.0 s
41.4 s
Top speed
230 km/h
143 mph
227 km/h
141 mph
Drag race simulation
60 ft
18 m
2.5 s
2.6 s
330 ft
101 m
6.8 s
7.0 s
1/8 mile
201 m
10.4 s
10.6 s
1000 ft
305 m
13.4 s
13.6 s
1/4 mile
402 m
15.9 s
16.2 s
Trap speed
1/4 mile
402 m
144 km/h
89 mph
142 km/h
88 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 Gran Coupe (G26)420i
170 hp
127 kW

BMW 4 Series Convertible (F33) 420i has 14 hp more than BMW 4 Series Gran Coupe (G26) 420i.

The biggest power difference is between BMW 4 Series Gran Coupe (G26) 420i and BMW 4 Series Convertible (F33) 420i: 14 hp (10 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 Gran Coupe (G26)420i
250 Nm
184 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
1,700 kg
3,748 lb
BMW4 Series Gran Coupe (G26)420i
1,620 kg
3,571 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 Gran Coupe (G26)420i
227 km/h
141 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)420i8.2 s
BMW4 Series Gran Coupe (G26)420i8.6 s

The biggest 0-100 km/h difference is between BMW 4 Series Convertible (F33) 420i and BMW 4 Series Gran Coupe (G26) 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 Convertible (F33)420i
6.6 L/100 km
35.6 mpg US
42.8 mpg UK
BMW4 Series Gran Coupe (G26)420i
8.1 L/100 km
29.0 mpg US
34.9 mpg UK

The biggest fuel consumption difference is between BMW 4 Series Convertible (F33) 420i and BMW 4 Series Gran Coupe (G26) 420i: 1.5 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 Convertible (F33)420i
108 hp/t
81 kW/t
9.2 kg/hp
BMW4 Series Gran Coupe (G26)420i
105 hp/t
78 kW/t
9.5 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
909 km
565 mi
BMW4 Series Gran Coupe (G26)420i
728 km
453 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
8.2 s
230 km/h
143 mph
BMW4 Series Gran Coupe (G26)420i
170 hp
127 kW
8.6 s
227 km/h
141 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/h8.2 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
BMW4 Series Gran Coupe (G26)420i
Power
170 hp
127 kW
0-100 km/h8.6 s
Top speed
227 km/h
141 mph
Doors/seats
5 doors
5 seats
Trunk
470 L
16.6 cu ft
Length
4,783 mm
188.3 in
Height
1,442 mm
56.8 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/h8.2 s
Top speed
230 km/h
143 mph
6.6 L/100 km
35.6 mpg US
42.8 mpg UK
BMW4 Series Gran Coupe (G26)420i
Power
170 hp
127 kW
0-100 km/h8.6 s
Top speed
227 km/h
141 mph
8.1 L/100 km
29.0 mpg US
34.9 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
6.6 L/100 km
35.6 mpg US
42.8 mpg UK
8.2 s
BMW4 Series Gran Coupe (G26)420i
8.1 L/100 km
29.0 mpg US
34.9 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
108 hp/t
81 kW/t
9.2 kg/hp
6.6 L/100 km
35.6 mpg US
42.8 mpg UK
BMW4 Series Gran Coupe (G26)420i
105 hp/t
78 kW/t
9.5 kg/hp
8.1 L/100 km
29.0 mpg US
34.9 mpg UK

Detailed score breakdown

Detailed score breakdown
VehicleBMW4 Series Convertible (F33)420iBMW4 Series Gran Coupe (G26)420i
Power
184 hp
137 kW
170 hp
127 kW
Torque
270 Nm
199 lb-ft
250 Nm
184 lb-ft
Acceleration
8.2 s
8.6 s
Top speed
230 km/h
143 mph
227 km/h
141 mph
Lightness
1,700 kg
3,748 lb
1,620 kg
3,571 lb
Fuel consumption
6.6 L/100 km
35.6 mpg US
42.8 mpg UK
8.1 L/100 km
29.0 mpg US
34.9 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
5 doors
5 seats
Trunk
470 L
16.6 cu ft
Length
4,783 mm
188.3 in
Height
1,442 mm
56.8 in
Range score
909 km
565 mi
728 km
453 mi
CO2 score
153 g/km
-
Trunk score
370 L
13.1 cu ft
470 L
16.6 cu ft
Power-to-weight score
108 hp/t
81 kW/t
9.2 kg/hp
105 hp/t
78 kW/t
9.5 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 Gran Coupe (G26) 420i
Consumption6.6 L/100 km35.6 mpg US42.8 mpg UK8.1 L/100 km29 mpg US34.9 mpg UK
Cost / 100 km11.55 LC100 km14.17 LC100 km
Cost / 100 mi18.59 LC100 mi22.81 LC100 mi
Annual fuel used990 L262 US gal218 UK gal1,215 L321 US gal267 UK gal
Annual fuel cost1,733 LC/year2,126 LC/year

Head-to-head comparisons

BMW 4 Series Convertible (F33) 420i

  • Has 14 hp more
  • Has 20 Nm more
  • Is 0.4 s quicker from 0-100 km/h
  • Has 3 km/h (2 mph) higher top speed
  • Uses 1.5 L/100 km less fuel
  • Has 3 hp/t better power-to-weight
  • Has 181 km (112 mi) more estimated range

Pros

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

Cons

  • Heaviest
  • Smallest trunk

BMW 4 Series Gran Coupe (G26) 420i

  • Is 80 kg lighter
  • Has 100 L more trunk volume

Pros

  • Lightest
  • Largest trunk

Cons

  • Slowest 0-100 km/h
  • Lowest power
  • Highest combined fuel consumption
  • Lowest top speed

Choose cars to compare

Brand
Model
Generation
Engine or modification
BMW 4 Series Convertible (F33) 420i
BMW 4 Series Gran Coupe (G26) 420i
Compare selected cars
2 vehicles selected

Popular comparisons

420i
420i
VS
BMW4 Series Convertible (F33)420ivsBMW4 Series Convertible (F33)Facelift 2017420i
420i
420i
VS
BMW4 Series Gran Coupe (G26)420ivsBMW4 Series Coupe (G22)420i
420i
420i
VS
BMW4 Series Convertible (F33)420ivsBMW4 Series Convertible (G23)420i
420i
420i
VS
BMW4 Series Gran Coupe (G26)420ivsBMW4 Series Gran Coupe (F36)Facelift 2017420i
420i
420i
VS
BMW4 Series Convertible (F33)420ivsBMW4 Series Gran Coupe (F36)420i
420i
420i
VS
BMW4 Series Gran Coupe (G26)420ivsBMW4 Series Coupe (F32)Facelift 2017420i
420i
420i
VS
BMW4 Series Convertible (F33)420ivsBMW4 Series Coupe (F32)420i
420i
420i
VS
BMW4 Series Convertible (F33)420ivsBMW4 Series Gran Coupe (G26)420i
420i
420i
VS
BMW4 Series Gran Coupe (G26)420ivsBMW4 Series Convertible (F33)420i
420i
220i
VS
BMW4 Series Convertible (F33)420ivsBMW2 Series Convertible (F23)220i
420i
218i
VS
BMW4 Series Gran Coupe (G26)420ivsBMW2 Series Coupe (G42)218i
420i
2.0 TDI clean diesel
VS
BMW4 Series Convertible (F33)420ivsAUDIA5 Cabriolet (8F7)Facelift 20112.0 TDI clean diesel
BMW 4 Series Convertible (F33) 420i vs BMW 4 Series Gran Coupe (G26) 420i - car comparison - FastVsFaster