Car comparison

BMW 4 Series Gran Coupe (G26) 420dvsBMW 4 Series Convertible (F33) · Facelift 2017 420d

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

New comparison

BMW 4 Series Gran Coupe (G26)

420d

190 hp1995 ccDieselAWDAutomaticTurbochargedCoupe2021-2024
VS

BMW 4 Series Convertible (F33) · Facelift 2017

420d

190 hp1995 ccDieselRWDAutomaticTurbochargedCabriolet / convertible2017-2020

Comparison overview

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

Best choices

BMW 4 Series Gran Coupe (G26) 420d

  • Quickest 0-100 km/h
    7.6 s
  • Fastest top speed
    233 km/h
    145 mph
  • Most powerful
    190 hp
    142 kW
  • Highest torque
    400 Nm
    295 lb-ft
  • Largest trunk
    470 L
  • Best overall score
    57/100
  • Best performance score
    52/100
  • Best practicality score
    69/100

Specification comparison

Specification comparison
ModelBMW4 Series Gran Coupe (G26)420dBMW4 Series Convertible (F33)Facelift 2017420d
Power
190hp142kW
190hp142kW
Torque
400Nm295lb-ft
400Nm295lb-ft
Curb weight
1,760kg3,880lb
1,715kg3,781lb
Gross weight
2,315kg5,104lb
2,185kg4,817lb
Top speed
233 km/h
145 mph
228 km/h
142 mph
To 99% top speed
96.3s99% target: 231 km/h / 143 mph
Calculated
98.5s99% target: 226 km/h / 140 mph
Calculated
0-100 km/h
7.6s
8.0s
0-200 km/h
34.3s
Calculated
38.1s
Calculated
0-60 mph
7.2s
Calculated
7.6s
Calculated
Fuel consumption
5.7L/100 km41.3mpg US49.6mpg UK
4.7L/100 km50mpg US60.1mpg UK
Fuel consumption city-
5.6L/100 km42mpg US50.4mpg UK
Fuel consumption highway-
4.2L/100 km56mpg US67.3mpg UK
Quarter mile
15.5s
Calculated
15.8s
Calculated
Power-to-weight
108hp/t81kW/t49hp/1000 lb
Calculated
111hp/t83kW/t50hp/1000 lb
Calculated
Torque-to-weight
227Nm/t152lb-ft/ton
Calculated
233Nm/t156lb-ft/ton
Calculated
Estimated range
1,035km643mi
Calculated
1,213km754mi
Calculated
Displacement
1,995cc122cu in
1,995cc122cu in
Length
4,783mm188in
4,640mm183in
Width
1,852mm73in
1,825mm72in
Height
1,442mm57in
1,384mm54in
Wheelbase
2,856mm112in
2,810mm111in
Front track
1,597mm63in
1,544mm61in
Rear track
1,624mm64in
1,593mm63in
Ground clearance
140mm6in
130mm5in
Trunk volume
470L
370L
Max trunk volume
1,290L
-
Doors
5
2
Seats
5
4
Fuel tank
59L
57L
CO2 emissions-
124g/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 (G26) 420dBMW 4 Series Convertible (F33) Facelift 2017 420dPowerTorque
  • BMW 4 Series Gran Coupe (G26) 420d: Power / Torque
  • BMW 4 Series Convertible (F33) Facelift 2017 420d: Power / Torque
Dyno simulation data table
VehiclePeak power RPMPeak torque RPMMax engine speed
BMW4 Series Gran Coupe (G26)420d4,000 rpm1,750-2,500 rpm4,250 rpm
BMW4 Series Convertible (F33)Facelift 2017420d4,000 rpm1,750-2,500 rpm4,250 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
MetricBMW4 Series Gran Coupe (G26)420dBMW4 Series Convertible (F33)Facelift 2017420d
Acceleration checkpoints
0-60 mph
0-97 km/h
7.2 s
7.6 s
0-100 km/h
0-62 mph
7.6 s
8.0 s
0-200 km/h
0-124 mph
34.3 s
38.1 s
Top speed
233 km/h
145 mph
228 km/h
142 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
10.3 s
1000 ft
305 m
13.0 s
13.3 s
1/4 mile
402 m
15.5 s
15.8 s
Trap speed
1/4 mile
402 m
148 km/h
92 mph
145 km/h
90 mph

Power comparison

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

Chart data table
VehicleValue
BMW4 Series Gran Coupe (G26)420d
190 hp
142 kW
BMW4 Series Convertible (F33)Facelift 2017420d
190 hp
142 kW

Torque comparison

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

Chart data table
VehicleValue
BMW4 Series Gran Coupe (G26)420d
400 Nm
295 lb-ft
BMW4 Series Convertible (F33)Facelift 2017420d
400 Nm
295 lb-ft

Curb weight comparison

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

Chart data table
VehicleValue
BMW4 Series Gran Coupe (G26)420d
1,760 kg
3,880 lb
BMW4 Series Convertible (F33)Facelift 2017420d
1,715 kg
3,781 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 (G26)420d
233 km/h
145 mph
BMW4 Series Convertible (F33)Facelift 2017420d
228 km/h
142 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 (G26)420d7.6 s
BMW4 Series Convertible (F33)Facelift 2017420d8.0 s

The biggest 0-100 km/h difference is between BMW 4 Series Gran Coupe (G26) 420d and BMW 4 Series Convertible (F33) Facelift 2017 420d: 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 (G26)420d
5.7 L/100 km
41.3 mpg US
49.6 mpg UK
BMW4 Series Convertible (F33)Facelift 2017420d
4.7 L/100 km
50.0 mpg US
60.1 mpg UK

The biggest fuel consumption difference is between BMW 4 Series Convertible (F33) Facelift 2017 420d and BMW 4 Series Gran Coupe (G26) 420d: 1.0 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 (G26)420d
108 hp/t
81 kW/t
9.3 kg/hp
BMW4 Series Convertible (F33)Facelift 2017420d
111 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 (G26)420d
1,035 km
643 mi
BMW4 Series Convertible (F33)Facelift 2017420d
1,213 km
754 mi

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
VehiclePowerAccelerationTop speed
BMW4 Series Gran Coupe (G26)420d
190 hp
142 kW
7.6 s
233 km/h
145 mph
BMW4 Series Convertible (F33)Facelift 2017420d
190 hp
142 kW
8.0 s
228 km/h
142 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 (G26)420d
Power
190 hp
142 kW
0-100 km/h7.6 s
Top speed
233 km/h
145 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
BMW4 Series Convertible (F33)Facelift 2017420d
Power
190 hp
142 kW
0-100 km/h8.0 s
Top speed
228 km/h
142 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 (G26)420d
Power
190 hp
142 kW
0-100 km/h7.6 s
Top speed
233 km/h
145 mph
5.7 L/100 km
41.3 mpg US
49.6 mpg UK
BMW4 Series Convertible (F33)Facelift 2017420d
Power
190 hp
142 kW
0-100 km/h8.0 s
Top speed
228 km/h
142 mph
4.7 L/100 km
50.0 mpg US
60.1 mpg UK

BMW 4 Series Gran Coupe (G26) 420d 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 (G26)420d
5.7 L/100 km
41.3 mpg US
49.6 mpg UK
7.6 s
BMW4 Series Convertible (F33)Facelift 2017420d
4.7 L/100 km
50.0 mpg US
60.1 mpg UK
8.0 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 (G26)420d
108 hp/t
81 kW/t
9.3 kg/hp
5.7 L/100 km
41.3 mpg US
49.6 mpg UK
BMW4 Series Convertible (F33)Facelift 2017420d
111 hp/t
83 kW/t
9.0 kg/hp
4.7 L/100 km
50.0 mpg US
60.1 mpg UK

Detailed score breakdown

Detailed score breakdown
VehicleBMW4 Series Gran Coupe (G26)420dBMW4 Series Convertible (F33)Facelift 2017420d
Power
190 hp
142 kW
190 hp
142 kW
Torque
400 Nm
295 lb-ft
400 Nm
295 lb-ft
Acceleration
7.6 s
8.0 s
Top speed
233 km/h
145 mph
228 km/h
142 mph
Lightness
1,760 kg
3,880 lb
1,715 kg
3,781 lb
Fuel consumption
5.7 L/100 km
41.3 mpg US
49.6 mpg UK
4.7 L/100 km
50.0 mpg US
60.1 mpg UK
Practicality
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
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
1,035 km
643 mi
1,213 km
754 mi
CO2 score
-
124 g/km
Trunk score
470 L
16.6 cu ft
370 L
13.1 cu ft
Power-to-weight score
108 hp/t
81 kW/t
9.3 kg/hp
111 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 (G26) 420dBMW 4 Series Convertible (F33) Facelift 2017 420d
Consumption5.7 L/100 km41.3 mpg US49.6 mpg UK4.7 L/100 km50 mpg US60.1 mpg UK
Cost / 100 km9.98 LC100 km8.23 LC100 km
Cost / 100 mi16.05 LC100 mi13.24 LC100 mi
Annual fuel used855 L226 US gal188 UK gal705 L186 US gal155 UK gal
Annual fuel cost1,496 LC/year1,234 LC/year

Head-to-head comparisons

BMW 4 Series Gran Coupe (G26) 420d

  • Is 0.4 s quicker from 0-100 km/h
  • Has 5 km/h (3 mph) higher top speed
  • Has 100 L more trunk volume

Pros

  • Quickest 0-100 km/h in this comparison
  • Highest top speed
  • Most powerful
  • Highest torque
  • Largest trunk

Cons

  • Highest combined fuel consumption
  • Heaviest

BMW 4 Series Convertible (F33) Facelift 2017 420d

  • Is 45 kg lighter
  • Uses 1.0 L/100 km less fuel
  • Has 3 hp/t better power-to-weight
  • Has 178 km (110 mi) more estimated range

Pros

  • Lightest
  • Lowest combined fuel consumption
  • Best power-to-weight ratio
  • Best estimated range

Cons

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

Choose cars to compare

Brand
Model
Generation
Engine or modification
BMW 4 Series Gran Coupe (G26) 420d
BMW 4 Series Convertible (F33) 420d
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