Car comparison

BMW 4 Series Convertible (F33) 425dvsBMW 4 Series Gran Coupe (G26) 420d

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

New comparison

BMW 4 Series Convertible (F33)

425d

218 hp1995 ccDieselRWDManualTurbochargedCabriolet / convertible2014-2016

BMW 4 Series Gran Coupe (G26)

420d

190 hp1995 ccDieselRWDAutomaticTurbochargedCoupe2021-2024

Comparison overview

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

BMW 4 Series Convertible (F33) 425d

Quickest 0-100 km/h
7.3 s
Fastest top speed
241 km/h
150 mph
Most powerful
218 hp
163 kW
Highest torque
450 Nm
332 lb-ft
Best power-to-weight
127 hp/t
95 kW/t
7.9 kg/hp
Lowest combined fuel consumption
5.4 L/100 km
43.6 mpg US
52.3 mpg UK
Best performance score
55/100
Best economy score
92/100

BMW 4 Series Gran Coupe (G26) 420d

Lightest
1,705 kg
3,759 lb
Best estimated range
1,093 km
679 mi
Largest trunk
470 L
Best overall score
58/100
Best practicality score
69/100

Specification comparison

Specification comparison
Model	BMW4 Series Convertible (F33)425d	BMW4 Series Gran Coupe (G26)420d
Power	218hp163kW	190hp142kW
Torque	450Nm332lb-ft	400Nm295lb-ft
Curb weight	1,715kg3,781lb	1,705kg3,759lb
Gross weight	2,165kg4,773lb	2,260kg4,982lb
Top speed	241 km/h 150 mph	235 km/h 146 mph
To 99% top speed	98.5s99% target: 239 km/h / 148 mph Calculated	92.8s99% target: 233 km/h / 145 mph Calculated
0-100 km/h	7.3s	7.3s
0-200 km/h	31.0s Calculated	32.1s Calculated
0-60 mph	6.9s Calculated	6.9s Calculated
Fuel consumption	5.4L/100 km43.6mpg US52.3mpg UK	5.4L/100 km43.6mpg US52.3mpg UK
Fuel consumption city	6.6L/100 km35.6mpg US42.8mpg UK	-
Fuel consumption highway	4.7L/100 km50mpg US60.1mpg UK	-
Quarter mile	15.2s Calculated	15.2s Calculated
Power-to-weight	127hp/t95kW/t58hp/1000 lb Calculated	111hp/t83kW/t51hp/1000 lb Calculated
Torque-to-weight	262Nm/t176lb-ft/ton Calculated	235Nm/t157lb-ft/ton Calculated
Estimated range	1,056km656mi Calculated	1,093km679mi Calculated
Displacement	1,995cc122cu in	1,995cc122cu 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	140mm6in
Trunk volume	370L	470L
Max trunk volume	-	1,290L
Doors	2	5
Seats	4	5
Fuel tank	57L	59L
CO2 emissions	142g/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) 425dBMW 4 Series Gran Coupe (G26) 420dPowerTorque

Dyno simulation data table
Vehicle	Peak power RPM	Peak torque RPM	Max engine speed
BMW4 Series Convertible (F33)425d	4,400 rpm	1,500-2,500 rpm	4,650 rpm
BMW4 Series Gran Coupe (G26)420d	4,000 rpm	1,750-2,500 rpm	4,250 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
Metric	BMW4 Series Convertible (F33)425d	BMW4 Series Gran Coupe (G26)420d
	Acceleration checkpoints
0-60 mph 0-97 km/h	6.9 s	6.9 s
0-100 km/h 0-62 mph	7.3 s	7.3 s
0-200 km/h 0-124 mph	31.0 s	32.1 s
Top speed	241 km/h 150 mph	235 km/h 146 mph
	Drag race simulation
60 ft 18 m	2.5 s	2.5 s
330 ft 101 m	6.6 s	6.6 s
1/8 mile 201 m	9.9 s	9.9 s
1000 ft 305 m	12.8 s	12.8 s
1/4 mile 402 m	15.2 s	15.2 s
Trap speed 1/4 mile 402 m	151 km/h 94 mph	151 km/h 94 mph

Power comparison

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

Chart data table
Vehicle	Value
BMW4 Series Convertible (F33)425d	218 hp 163 kW
BMW4 Series Gran Coupe (G26)420d	190 hp 142 kW

BMW 4 Series Convertible (F33) 425d has 28 hp more than BMW 4 Series Gran Coupe (G26) 420d.

The biggest power difference is between BMW 4 Series Gran Coupe (G26) 420d and BMW 4 Series Convertible (F33) 425d: 28 hp (21 kW).

Torque comparison

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

Chart data table
Vehicle	Value
BMW4 Series Convertible (F33)425d	450 Nm 332 lb-ft
BMW4 Series Gran Coupe (G26)420d	400 Nm 295 lb-ft

Curb weight comparison

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

Chart data table
Vehicle	Value
BMW4 Series Convertible (F33)425d	1,715 kg 3,781 lb
BMW4 Series Gran Coupe (G26)420d	1,705 kg 3,759 lb

Top speed without limiter comparison

Bar comparison chart for Top speed without limiter. Higher is better · km/h / mph

Chart data table
Vehicle	Value
BMW4 Series Convertible (F33)425d	241 km/h 150 mph
BMW4 Series Gran Coupe (G26)420d	235 km/h 146 mph

0-100 km/h comparison

Bar comparison chart for 0-100 km/h. Lower is better · seconds

Chart data table
Vehicle	Value
BMW4 Series Convertible (F33)425d	7.3 s
BMW4 Series Gran Coupe (G26)420d	7.3 s

Fuel consumption comparison

Bar comparison chart for Fuel consumption. Lower is better · L/100 km / mpg US / mpg UK

Chart data table
Vehicle	Value
BMW4 Series Convertible (F33)425d	5.4 L/100 km 43.6 mpg US 52.3 mpg UK
BMW4 Series Gran Coupe (G26)420d	5.4 L/100 km 43.6 mpg US 52.3 mpg UK

Power-to-weight comparison

Bar comparison chart for Power-to-weight. Higher is better · hp/t / kW/t

Chart data table
Vehicle	Value
BMW4 Series Convertible (F33)425d	127 hp/t 95 kW/t 7.9 kg/hp
BMW4 Series Gran Coupe (G26)420d	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
Vehicle	Value
BMW4 Series Convertible (F33)425d	1,056 km 656 mi
BMW4 Series Gran Coupe (G26)420d	1,093 km 679 mi

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
Vehicle	Power	Acceleration	Top speed
BMW4 Series Convertible (F33)425d	218 hp 163 kW	7.3 s	241 km/h 150 mph
BMW4 Series Gran Coupe (G26)420d	190 hp 142 kW	7.3 s	235 km/h 146 mph

Most attractive quadrant

Scatter chart with performance score on the X axis and practicality score on the Y axis.

Vehicle

Performance score

Practicality score

BMW4 Series Convertible (F33)425d

Power	218 hp 163 kW
0-100 km/h	7.3 s
Top speed 241 km/h 150 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)420d

Power	190 hp 142 kW
0-100 km/h	7.3 s
Top speed 235 km/h 146 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.

Vehicle

Performance score

Fuel economy score

BMW4 Series Convertible (F33)425d

Power	218 hp 163 kW
0-100 km/h	7.3 s
Top speed 241 km/h 150 mph

5.4 L/100 km

43.6 mpg US

52.3 mpg UK

BMW4 Series Gran Coupe (G26)420d

Power	190 hp 142 kW
0-100 km/h	7.3 s
Top speed 235 km/h 146 mph

5.4 L/100 km

43.6 mpg US

52.3 mpg UK

BMW 4 Series Convertible (F33) 425d 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
Vehicle	Fuel consumption, L/100 km	0-100 km/h, s
BMW4 Series Convertible (F33)425d	5.4 L/100 km 43.6 mpg US 52.3 mpg UK	7.3 s
BMW4 Series Gran Coupe (G26)420d	5.4 L/100 km 43.6 mpg US 52.3 mpg UK	7.3 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
Vehicle	Power-to-weight, hp/t	Fuel consumption, L/100 km
BMW4 Series Convertible (F33)425d	127 hp/t 95 kW/t 7.9 kg/hp	5.4 L/100 km 43.6 mpg US 52.3 mpg UK
BMW4 Series Gran Coupe (G26)420d	111 hp/t 83 kW/t 9.0 kg/hp	5.4 L/100 km 43.6 mpg US 52.3 mpg UK

Detailed score breakdown

Vehicle

BMW4 Series Convertible (F33)425d

BMW4 Series Gran Coupe (G26)420d

Power

218 hp

163 kW

190 hp

142 kW

Torque

450 Nm

332 lb-ft

400 Nm

295 lb-ft

Acceleration

7.3 s

Top speed

241 km/h

150 mph

235 km/h

146 mph

Lightness

1,715 kg

3,781 lb

1,705 kg

3,759 lb

Fuel consumption

5.4 L/100 km

43.6 mpg US

52.3 mpg UK

5.4 L/100 km

43.6 mpg US

52.3 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

1,056 km

656 mi

1,093 km

679 mi

CO2 score

142 g/km

Trunk score

370 L

13.1 cu ft

470 L

16.6 cu ft

Power-to-weight score

127 hp/t

95 kW/t

7.9 kg/hp

111 hp/t

83 kW/t

9.0 kg/hp

Overall

Fixed score

Fuel cost and annual usage

Estimate running costs from combined consumption, your annual distance, and the fuel price in your local currency.

Average annual distanceDistance unitFuel price in your local currencyPrice unit

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
Vehicle	BMW 4 Series Convertible (F33) 425d	BMW 4 Series Gran Coupe (G26) 420d
Consumption	5.4 L/100 km43.6 mpg US52.3 mpg UK	5.4 L/100 km43.6 mpg US52.3 mpg UK
Cost / 100 km	9.45 LC100 km	9.45 LC100 km
Cost / 100 mi	15.21 LC100 mi	15.21 LC100 mi
Annual fuel used	810 L214 US gal178 UK gal	810 L214 US gal178 UK gal
Annual fuel cost	1,418 LC/year	1,418 LC/year