Car comparison

BMW 4 Series Convertible (G23) 430dvsBMW X4 (G02) 30d

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

New comparison

BMW 4 Series Convertible (G23)

430d

286 hp2993 ccDieselRWDAutomaticTurbochargedCabriolet / convertible2021-2024
VS

BMW X4 (G02)

30d

286 hp2993 ccDieselAWDAutomaticTurbocharged2020-2021

Comparison overview

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

Best choices

BMW X4 (G02) 30d

  • Quickest 0-100 km/h
    5.7 s
  • Lowest combined fuel consumption
    5.6 L/100 km
    42.0 mpg US
    50.4 mpg UK
  • Best estimated range
    1,214 km
    755 mi
  • Largest trunk
    525 L
  • Best overall score
    70/100
  • Best economy score
    92/100
  • Best practicality score
    76/100

BMW 4 Series Convertible (G23) 430d

  • Fastest top speed
    260 km/h
    162 mph Unrestricted
    250 km/h
    155 mph Restricted
  • Most powerful
    286 hp
    213 kW
  • Highest torque
    650 Nm
    479 lb-ft
  • Lightest
    1,880 kg
    4,145 lb
  • Best power-to-weight
    152 hp/t
    113 kW/t
    6.6 kg/hp
  • Best performance score
    68/100

Specification comparison

Specification comparison
ModelBMW4 Series Convertible (G23)430dBMWX4 (G02)30d
Power
286hp213kW
286hp213kW
Torque
650Nm479lb-ft
650Nm479lb-ft
Curb weight
1,880kg4,145lb
1,930kg4,255lb
Gross weight
2,380kg5,247lb
2,530kg5,578lb
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Calculated
245 km/h
152 mph
To 99% top speed
83.5s99% target: 257 km/h / 160 mph
Calculated
82.2s99% target: 243 km/h / 151 mph
Calculated
0-100 km/h
5.8s
5.7s
0-200 km/h
21.5s
Calculated
24.1s
Calculated
0-60 mph
5.5s
Calculated
5.4s
Calculated
Fuel consumption
6L/100 km39.2mpg US47.1mpg UK
5.6L/100 km42mpg US50.4mpg UK
Fuel consumption city-
6.7L/100 km35.1mpg US42.2mpg UK
Fuel consumption highway-
4.9L/100 km48mpg US57.6mpg UK
Quarter mile
13.9s
Calculated
13.9s
Calculated
Power-to-weight
152hp/t113kW/t69hp/1000 lb
Calculated
148hp/t111kW/t67hp/1000 lb
Calculated
Torque-to-weight
346Nm/t231lb-ft/ton
Calculated
337Nm/t225lb-ft/ton
Calculated
Estimated range
983km611mi
Calculated
1,214km755mi
Calculated
Displacement
2,993cc183cu in
2,993cc183cu in
Length
4,768mm188in
4,752mm187in
Width
1,852mm73in
1,918mm76in
Height
1,384mm54in
1,621mm64in
Wheelbase
2,851mm112in
2,864mm113in
Front track
1,573mm62in
1,620mm64in
Rear track
1,612mm63in
1,666mm66in
Ground clearance
124mm5in
204mm8in
Trunk volume
300L
525L
Max trunk volume
385L
1,430L
Doors
2
5
Seats
4
5
Fuel tank
59L
68L

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 (G23) 430dBMW X4 (G02) 30dPowerTorque
  • BMW 4 Series Convertible (G23) 430d: Power / Torque
  • BMW X4 (G02) 30d: Power / Torque
Dyno simulation data table
VehiclePeak power RPMPeak torque RPMMax engine speed
BMW4 Series Convertible (G23)430d4,000 rpm1,500-2,500 rpm4,250 rpm
BMWX4 (G02)30d4,000 rpm1,500-2,500 rpm4,250 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
MetricBMW4 Series Convertible (G23)430dBMWX4 (G02)30d
Acceleration checkpoints
0-60 mph
0-97 km/h
5.5 s
5.4 s
0-100 km/h
0-62 mph
5.8 s
5.7 s
0-200 km/h
0-124 mph
21.5 s
24.1 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Limited
245 km/h
152 mph
Drag race simulation
60 ft
18 m
2.3 s
2.2 s
330 ft
101 m
6.0 s
5.9 s
1/8 mile
201 m
9.1 s
9.0 s
1000 ft
305 m
11.7 s
11.7 s
1/4 mile
402 m
13.9 s
13.9 s
Trap speed
1/4 mile
402 m
166 km/h
103 mph
162 km/h
101 mph

Power comparison

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

Chart data table
VehicleValue
BMW4 Series Convertible (G23)430d
286 hp
213 kW
BMWX4 (G02)30d
286 hp
213 kW

Torque comparison

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

Chart data table
VehicleValue
BMW4 Series Convertible (G23)430d
650 Nm
479 lb-ft
BMWX4 (G02)30d
650 Nm
479 lb-ft

Curb weight comparison

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

Chart data table
VehicleValue
BMW4 Series Convertible (G23)430d
1,880 kg
4,145 lb
BMWX4 (G02)30d
1,930 kg
4,255 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 (G23)430d
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
BMWX4 (G02)30d
245 km/h
152 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 (G23)430d5.8 s
BMWX4 (G02)30d5.7 s

The biggest 0-100 km/h difference is between BMW X4 (G02) 30d and BMW 4 Series Convertible (G23) 430d: 0.1 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 (G23)430d
6.0 L/100 km
39.2 mpg US
47.1 mpg UK
BMWX4 (G02)30d
5.6 L/100 km
42.0 mpg US
50.4 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 (G23)430d
152 hp/t
113 kW/t
6.6 kg/hp
BMWX4 (G02)30d
148 hp/t
111 kW/t
6.7 kg/hp

Estimated range comparison

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

Chart data table
VehicleValue
BMW4 Series Convertible (G23)430d
983 km
611 mi
BMWX4 (G02)30d
1,214 km
755 mi

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
VehiclePowerAccelerationTop speed
BMW4 Series Convertible (G23)430d
286 hp
213 kW
5.8 s
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
BMWX4 (G02)30d
286 hp
213 kW
5.7 s
245 km/h
152 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 (G23)430d
Power
286 hp
213 kW
0-100 km/h5.8 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 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
BMWX4 (G02)30d
Power
286 hp
213 kW
0-100 km/h5.7 s
Top speed
245 km/h
152 mph
Doors/seats
5 doors
5 seats
Trunk
525 L
18.5 cu ft
Length
4,752 mm
187.1 in
Height
1,621 mm
63.8 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 (G23)430d
Power
286 hp
213 kW
0-100 km/h5.8 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
6.0 L/100 km
39.2 mpg US
47.1 mpg UK
BMWX4 (G02)30d
Power
286 hp
213 kW
0-100 km/h5.7 s
Top speed
245 km/h
152 mph
5.6 L/100 km
42.0 mpg US
50.4 mpg UK

BMW 4 Series Convertible (G23) 430d 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 (G23)430d
6.0 L/100 km
39.2 mpg US
47.1 mpg UK
5.8 s
BMWX4 (G02)30d
5.6 L/100 km
42.0 mpg US
50.4 mpg UK
5.7 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 (G23)430d
152 hp/t
113 kW/t
6.6 kg/hp
6.0 L/100 km
39.2 mpg US
47.1 mpg UK
BMWX4 (G02)30d
148 hp/t
111 kW/t
6.7 kg/hp
5.6 L/100 km
42.0 mpg US
50.4 mpg UK

Detailed score breakdown

Detailed score breakdown
VehicleBMW4 Series Convertible (G23)430dBMWX4 (G02)30d
Power
286 hp
213 kW
286 hp
213 kW
Torque
650 Nm
479 lb-ft
650 Nm
479 lb-ft
Acceleration
5.8 s
5.7 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
245 km/h
152 mph
Lightness
1,880 kg
4,145 lb
1,930 kg
4,255 lb
Fuel consumption
6.0 L/100 km
39.2 mpg US
47.1 mpg UK
5.6 L/100 km
42.0 mpg US
50.4 mpg UK
Practicality
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
Doors/seats
5 doors
5 seats
Trunk
525 L
18.5 cu ft
Length
4,752 mm
187.1 in
Height
1,621 mm
63.8 in
Range score
983 km
611 mi
1,214 km
755 mi
Trunk score
300 L
10.6 cu ft
525 L
18.5 cu ft
Power-to-weight score
152 hp/t
113 kW/t
6.6 kg/hp
148 hp/t
111 kW/t
6.7 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 (G23) 430dBMW X4 (G02) 30d
Consumption6 L/100 km39.2 mpg US47.1 mpg UK5.6 L/100 km42 mpg US50.4 mpg UK
Cost / 100 km10.50 LC100 km9.80 LC100 km
Cost / 100 mi16.90 LC100 mi15.77 LC100 mi
Annual fuel used900 L238 US gal198 UK gal840 L222 US gal185 UK gal
Annual fuel cost1,575 LC/year1,470 LC/year

Head-to-head comparisons

BMW 4 Series Convertible (G23) 430d

  • Is 50 kg lighter
  • Has 15 km/h (9 mph) higher top speed
  • Has 4 hp/t better power-to-weight

Pros

  • Highest top speed
  • Most powerful
  • Highest torque
  • Lightest
  • Best power-to-weight ratio

Cons

  • Slowest 0-100 km/h
  • Highest combined fuel consumption
  • Smallest trunk

BMW X4 (G02) 30d

  • Is 0.1 s quicker from 0-100 km/h
  • Uses 0.4 L/100 km less fuel
  • Has 231 km (144 mi) more estimated range
  • Has 225 L more trunk volume

Pros

  • Quickest 0-100 km/h in this comparison
  • Lowest combined fuel consumption
  • Best estimated range
  • Largest trunk

Cons

  • Heaviest
  • Lowest top speed

Choose cars to compare

Brand
Model
Generation
Engine or modification
BMW 4 Series Convertible (G23) 430d
BMW X4 (G02) 30d
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