Car comparison

BMW 4 Series Convertible (F33) 425dvsBMW 4 Series Convertible (G23) 420d

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

New comparison

BMW 4 Series Convertible (F33)

425d

224 hp1995 ccDieselRWDAutomaticTurbochargedCabriolet / convertible2016-2017
VS

BMW 4 Series Convertible (G23)

420d

190 hp1995 ccDieselRWDAutomaticTurbochargedCabriolet / convertible2020-2024

Comparison overview

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

Best choices

BMW 4 Series Convertible (F33) 425d

  • Quickest 0-100 km/h
    6.7 s
  • Fastest top speed
    241 km/h
    150 mph
  • Most powerful
    224 hp
    167 kW
  • Highest torque
    450 Nm
    332 lb-ft
  • Lightest
    1,745 kg
    3,847 lb
  • Best power-to-weight
    128 hp/t
    96 kW/t
    7.8 kg/hp
  • Largest trunk
    370 L
  • Best overall score
    54/100
  • Best performance score
    57/100
  • Best practicality score
    47/100

BMW 4 Series Convertible (G23) 420d

  • Lowest combined fuel consumption
    4.5 L/100 km
    52.3 mpg US
    62.8 mpg UK
  • Lowest city consumption
    5.0 L/100 km
    47.0 mpg US
    56.5 mpg UK
  • Lowest highway consumption
    4.3 L/100 km
    54.7 mpg US
    65.7 mpg UK
  • Best estimated range
    1,311 km
    815 mi
  • Best economy score
    95/100

Specification comparison

Specification comparison
ModelBMW4 Series Convertible (F33)425dBMW4 Series Convertible (G23)420d
Power
224hp167kW
190hp142kW
Torque
450Nm332lb-ft
400Nm295lb-ft
Curb weight
1,745kg3,847lb
1,775kg3,913lb
Gross weight
2,240kg4,938lb
2,270kg5,004lb
Top speed
241 km/h
150 mph
236 km/h
147 mph
To 99% top speed
89.1s99% target: 239 km/h / 148 mph
Calculated
99.3s99% target: 234 km/h / 145 mph
Calculated
0-100 km/h
6.7s
7.6s
0-200 km/h
28.2s
Calculated
33.6s
Calculated
0-60 mph
6.3s
Calculated
7.2s
Calculated
Fuel consumption
4.8L/100 km49mpg US58.9mpg UK
4.5L/100 km52.3mpg US62.8mpg UK
Fuel consumption city
5.9L/100 km39.9mpg US47.9mpg UK
5L/100 km47mpg US56.5mpg UK
Fuel consumption highway
4.7L/100 km50mpg US60.1mpg UK
4.3L/100 km54.7mpg US65.7mpg UK
Quarter mile
14.8s
Calculated
15.5s
Calculated
Power-to-weight
128hp/t96kW/t58hp/1000 lb
Calculated
107hp/t80kW/t49hp/1000 lb
Calculated
Torque-to-weight
258Nm/t173lb-ft/ton
Calculated
225Nm/t151lb-ft/ton
Calculated
Estimated range
1,188km738mi
Calculated
1,311km815mi
Calculated
Displacement
1,995cc122cu in
1,995cc122cu in
Length
4,638mm183in
4,768mm188in
Width
1,825mm72in
1,852mm73in
Height
1,384mm54in
1,384mm54in
Wheelbase
2,810mm111in
2,851mm112in
Front track
1,545mm61in
1,575mm62in
Rear track
1,594mm63in
1,611mm63in
Ground clearance
130mm5in
124mm5in
Trunk volume
370L
300L
Max trunk volume-
385L
Doors
2
2
Seats
4
4
Fuel tank
57L
59L

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 Convertible (G23) 420dPowerTorque
  • BMW 4 Series Convertible (F33) 425d: Power / Torque
  • BMW 4 Series Convertible (G23) 420d: Power / Torque
Dyno simulation data table
VehiclePeak power RPMPeak torque RPMMax engine speed
BMW4 Series Convertible (F33)425d4,400 rpm1,500-3,000 rpm4,650 rpm
BMW4 Series Convertible (G23)420d4,000 rpm1,750-2,500 rpm4,250 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
MetricBMW4 Series Convertible (F33)425dBMW4 Series Convertible (G23)420d
Acceleration checkpoints
0-60 mph
0-97 km/h
6.3 s
7.2 s
0-100 km/h
0-62 mph
6.7 s
7.6 s
0-200 km/h
0-124 mph
28.2 s
33.6 s
Top speed
241 km/h
150 mph
236 km/h
147 mph
Drag race simulation
60 ft
18 m
2.4 s
2.5 s
330 ft
101 m
6.4 s
6.7 s
1/8 mile
201 m
9.6 s
10.1 s
1000 ft
305 m
12.4 s
13.0 s
1/4 mile
402 m
14.8 s
15.5 s
Trap speed
1/4 mile
402 m
155 km/h
96 mph
148 km/h
92 mph

Power comparison

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

Chart data table
VehicleValue
BMW4 Series Convertible (F33)425d
224 hp
167 kW
BMW4 Series Convertible (G23)420d
190 hp
142 kW

BMW 4 Series Convertible (F33) 425d has 34 hp more than BMW 4 Series Convertible (G23) 420d.

The biggest power difference is between BMW 4 Series Convertible (G23) 420d and BMW 4 Series Convertible (F33) 425d: 34 hp (25 kW).

Torque comparison

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

Chart data table
VehicleValue
BMW4 Series Convertible (F33)425d
450 Nm
332 lb-ft
BMW4 Series Convertible (G23)420d
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 Convertible (F33)425d
1,745 kg
3,847 lb
BMW4 Series Convertible (G23)420d
1,775 kg
3,913 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)425d
241 km/h
150 mph
BMW4 Series Convertible (G23)420d
236 km/h
147 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)425d6.7 s
BMW4 Series Convertible (G23)420d7.6 s

The biggest 0-100 km/h difference is between BMW 4 Series Convertible (F33) 425d and BMW 4 Series Convertible (G23) 420d: 0.9 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)425d
4.8 L/100 km
49.0 mpg US
58.9 mpg UK
BMW4 Series Convertible (G23)420d
4.5 L/100 km
52.3 mpg US
62.8 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 Convertible (F33)425d
128 hp/t
96 kW/t
7.8 kg/hp
BMW4 Series Convertible (G23)420d
107 hp/t
80 kW/t
9.3 kg/hp

Estimated range comparison

Bar comparison chart for Estimated range. Higher is better · km / mi

Chart data table
VehicleValue
BMW4 Series Convertible (F33)425d
1,188 km
738 mi
BMW4 Series Convertible (G23)420d
1,311 km
815 mi

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
VehiclePowerAccelerationTop speed
BMW4 Series Convertible (F33)425d
224 hp
167 kW
6.7 s
241 km/h
150 mph
BMW4 Series Convertible (G23)420d
190 hp
142 kW
7.6 s
236 km/h
147 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)425d
Power
224 hp
167 kW
0-100 km/h6.7 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 Convertible (G23)420d
Power
190 hp
142 kW
0-100 km/h7.6 s
Top speed
236 km/h
147 mph
Doors/seats
2 doors
4 seats
Trunk
300 L
10.6 cu ft
Length
4,768 mm
187.7 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 Convertible (F33)425d
Power
224 hp
167 kW
0-100 km/h6.7 s
Top speed
241 km/h
150 mph
4.8 L/100 km
49.0 mpg US
58.9 mpg UK
BMW4 Series Convertible (G23)420d
Power
190 hp
142 kW
0-100 km/h7.6 s
Top speed
236 km/h
147 mph
4.5 L/100 km
52.3 mpg US
62.8 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
VehicleFuel consumption, L/100 km0-100 km/h, s
BMW4 Series Convertible (F33)425d
4.8 L/100 km
49.0 mpg US
58.9 mpg UK
6.7 s
BMW4 Series Convertible (G23)420d
4.5 L/100 km
52.3 mpg US
62.8 mpg UK
7.6 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)425d
128 hp/t
96 kW/t
7.8 kg/hp
4.8 L/100 km
49.0 mpg US
58.9 mpg UK
BMW4 Series Convertible (G23)420d
107 hp/t
80 kW/t
9.3 kg/hp
4.5 L/100 km
52.3 mpg US
62.8 mpg UK

Detailed score breakdown

Detailed score breakdown
VehicleBMW4 Series Convertible (F33)425dBMW4 Series Convertible (G23)420d
Power
224 hp
167 kW
190 hp
142 kW
Torque
450 Nm
332 lb-ft
400 Nm
295 lb-ft
Acceleration
6.7 s
7.6 s
Top speed
241 km/h
150 mph
236 km/h
147 mph
Lightness
1,745 kg
3,847 lb
1,775 kg
3,913 lb
Fuel consumption
4.8 L/100 km
49.0 mpg US
58.9 mpg UK
4.5 L/100 km
52.3 mpg US
62.8 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
2 doors
4 seats
Trunk
300 L
10.6 cu ft
Length
4,768 mm
187.7 in
Height
1,384 mm
54.5 in
Range score
1,188 km
738 mi
1,311 km
815 mi
Trunk score
370 L
13.1 cu ft
300 L
10.6 cu ft
Power-to-weight score
128 hp/t
96 kW/t
7.8 kg/hp
107 hp/t
80 kW/t
9.3 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) 425dBMW 4 Series Convertible (G23) 420d
Consumption4.8 L/100 km49 mpg US58.9 mpg UK4.5 L/100 km52.3 mpg US62.8 mpg UK
Cost / 100 km8.40 LC100 km7.88 LC100 km
Cost / 100 mi13.52 LC100 mi12.67 LC100 mi
Annual fuel used720 L190 US gal158 UK gal675 L178 US gal148 UK gal
Annual fuel cost1,260 LC/year1,181 LC/year

Head-to-head comparisons

BMW 4 Series Convertible (F33) 425d

  • Has 34 hp more
  • Has 50 Nm more
  • Is 30 kg lighter
  • Is 0.9 s quicker from 0-100 km/h
  • Has 5 km/h (3 mph) higher top speed
  • Has 21 hp/t better power-to-weight
  • Has 70 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

BMW 4 Series Convertible (G23) 420d

  • Uses 0.3 L/100 km less fuel
  • Has 124 km (77 mi) more estimated range

Pros

  • Lowest combined fuel consumption
  • Best estimated range

Cons

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

Choose cars to compare

Brand
Model
Generation
Engine or modification
BMW 4 Series Convertible (F33) 425d
BMW 4 Series Convertible (G23) 420d
Compare selected cars
2 vehicles selected

Popular comparisons

425d
430i
VS
BMW4 Series Convertible (F33)425dvsBMW4 Series Convertible (F33)Facelift 2017430i
425d
430i
VS
BMW4 Series Convertible (F33)425dvsBMW4 Series Convertible (G23)430i
420d
420i
VS
BMW4 Series Convertible (G23)420dvsBMW4 Series Convertible (F33)420i
425d
425d
VS
BMW4 Series Convertible (F33)425dvsBMW4 Series Gran Coupe (F36)425d
420d
420d
VS
BMW4 Series Convertible (G23)420dvsBMW4 Series Coupe (G22)420d
425d
425d
VS
BMW4 Series Convertible (F33)425dvsBMW4 Series Coupe (F32)425d
420d
420d
VS
BMW4 Series Convertible (G23)420dvsBMW4 Series Gran Coupe (G26)420d
425d
420d
VS
BMW4 Series Convertible (F33)425dvsBMW4 Series Coupe (F32)Facelift 2017420d
420d
420d
VS
BMW4 Series Convertible (G23)420dvsBMW4 Series Gran Coupe (F36)Facelift 2017420d
425d
230i
VS
BMW4 Series Convertible (F33)425dvsBMW2 Series Convertible (F23)230i
425d
125i
VS
BMW4 Series Convertible (F33)425dvsBMW1 Series Convertible (E88)125i
420d
40 TFSI
VS
BMW4 Series Convertible (G23)420dvsAUDIA5 Cabriolet (F5)Facelift 201940 TFSI
BMW 4 Series Convertible (F33) 425d vs BMW 4 Series Convertible (G23) 420d - car comparison - FastVsFaster