Car comparison

BMW 4 Series Convertible (G23) 430ivsBMW X3 (G01 LCI) · Facelift 2021 30d

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

New comparison

BMW 4 Series Convertible (G23)

430i

258 hp1998 ccGasolineRWDAutomaticTurbochargedCabriolet / convertible2020-2024

BMW X3 (G01 LCI) · Facelift 2021

30d

249 hp2993 ccDieselAWDAutomaticTurbocharged2021-2024

Comparison overview

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

BMW 4 Series Convertible (G23) 430i

Fastest top speed
260 km/h
162 mph Unrestricted
250 km/h
155 mph Restricted
Most powerful
258 hp
192 kW
Lightest
1,715 kg
3,781 lb
Best power-to-weight
150 hp/t
112 kW/t
6.6 kg/hp
Lowest combined fuel consumption
6.4 L/100 km
36.8 mpg US
44.1 mpg UK
Best estimated range
922 km
573 mi
Best economy score
90/100

BMW X3 (G01 LCI) Facelift 2021 30d

Quickest 0-100 km/h
5.9 s
Highest torque
650 Nm
479 lb-ft
Largest trunk
550 L
Best overall score
67/100
Best performance score
63/100
Best practicality score
77/100

Specification comparison

Specification comparison
Model	BMW4 Series Convertible (G23)430i	BMWX3 (G01 LCI)Facelift 202130d
Power	258hp192kW	249hp186kW
Torque	400Nm295lb-ft	650Nm479lb-ft
Curb weight	1,715kg3,781lb	1,935kg4,266lb
Gross weight	2,200kg4,850lb	2,550kg5,622lb
Top speed	Unrestricted 260 km/h162 mph Restricted 250 km/h155 mph Calculated	235 km/h 146 mph
To 99% top speed	88.2s99% target: 257 km/h / 160 mph Calculated	84.8s99% target: 233 km/h / 145 mph Calculated
0-100 km/h	6.2s	5.9s
0-200 km/h	22.9s Calculated	27.9s Calculated
0-60 mph	5.9s Calculated	5.6s Calculated
Fuel consumption	6.4L/100 km36.8mpg US44.1mpg UK	7.4L/100 km31.8mpg US38.2mpg UK
Fuel consumption city	7.8L/100 km30.2mpg US36.2mpg UK	-
Fuel consumption highway	5.6L/100 km42mpg US50.4mpg UK	-
Quarter mile	14.3s Calculated	14.1s Calculated
Power-to-weight	150hp/t112kW/t68hp/1000 lb Calculated	129hp/t96kW/t58hp/1000 lb Calculated
Torque-to-weight	233Nm/t156lb-ft/ton Calculated	336Nm/t225lb-ft/ton Calculated
Estimated range	922km573mi Calculated	919km571mi Calculated
Displacement	1,998cc122cu in	2,993cc183cu in
Length	4,768mm188in	4,708mm185in
Width	1,852mm73in	1,891mm74in
Height	1,384mm54in	1,676mm66in
Wheelbase	2,851mm112in	2,864mm113in
Front track	1,575mm62in	-
Rear track	1,611mm63in	-
Ground clearance	124mm5in	-
Trunk volume	300L	550L
Max trunk volume	385L	1,600L
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) 430iBMW X3 (G01 LCI) Facelift 2021 30dPowerTorque

Dyno simulation data table
Vehicle	Peak power RPM	Peak torque RPM	Max engine speed
BMW4 Series Convertible (G23)430i	5,000-6,500 rpm	1,550-4,400 rpm	6,750 rpm
BMWX3 (G01 LCI)Facelift 202130d	3,250-4,400 rpm	1,500-2,500 rpm	4,650 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
Metric	BMW4 Series Convertible (G23)430i	BMWX3 (G01 LCI)Facelift 202130d
	Acceleration checkpoints
0-60 mph 0-97 km/h	5.9 s	5.6 s
0-100 km/h 0-62 mph	6.2 s	5.9 s
0-200 km/h 0-124 mph	22.9 s	27.9 s
Top speed	Unrestricted 260 km/h162 mph Restricted 250 km/h155 mph Likely limited	235 km/h 146 mph
	Drag race simulation
60 ft 18 m	2.3 s	2.2 s
330 ft 101 m	6.2 s	6.0 s
1/8 mile 201 m	9.3 s	9.1 s
1000 ft 305 m	12.0 s	11.8 s
1/4 mile 402 m	14.3 s	14.1 s
Trap speed 1/4 mile 402 m	163 km/h 101 mph	158 km/h 98 mph

Power comparison

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

Chart data table
Vehicle	Value
BMW4 Series Convertible (G23)430i	258 hp 192 kW
BMWX3 (G01 LCI)Facelift 202130d	249 hp 186 kW

BMW 4 Series Convertible (G23) 430i has 9 hp more than BMW X3 (G01 LCI) Facelift 2021 30d.

The biggest power difference is between BMW X3 (G01 LCI) Facelift 2021 30d and BMW 4 Series Convertible (G23) 430i: 9 hp (7 kW).

Torque comparison

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

Chart data table
Vehicle	Value
BMW4 Series Convertible (G23)430i	400 Nm 295 lb-ft
BMWX3 (G01 LCI)Facelift 202130d	650 Nm 479 lb-ft

Curb weight comparison

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

Chart data table
Vehicle	Value
BMW4 Series Convertible (G23)430i	1,715 kg 3,781 lb
BMWX3 (G01 LCI)Facelift 202130d	1,935 kg 4,266 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 (G23)430i	Unrestricted 260 km/h162 mph Restricted 250 km/h155 mph
BMWX3 (G01 LCI)Facelift 202130d	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 (G23)430i	6.2 s
BMWX3 (G01 LCI)Facelift 202130d	5.9 s

Although BMW 4 Series Convertible (G23) 430i has more power, BMW X3 (G01 LCI) Facelift 2021 30d is quicker from 0-100 km/h.

The biggest 0-100 km/h difference is between BMW X3 (G01 LCI) Facelift 2021 30d and BMW 4 Series Convertible (G23) 430i: 0.3 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 (G23)430i	6.4 L/100 km 36.8 mpg US 44.1 mpg UK
BMWX3 (G01 LCI)Facelift 202130d	7.4 L/100 km 31.8 mpg US 38.2 mpg UK

The biggest fuel consumption difference is between BMW 4 Series Convertible (G23) 430i and BMW X3 (G01 LCI) Facelift 2021 30d: 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
Vehicle	Value
BMW4 Series Convertible (G23)430i	150 hp/t 112 kW/t 6.6 kg/hp
BMWX3 (G01 LCI)Facelift 202130d	129 hp/t 96 kW/t 7.8 kg/hp

Estimated range comparison

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

Chart data table
Vehicle	Value
BMW4 Series Convertible (G23)430i	922 km 573 mi
BMWX3 (G01 LCI)Facelift 202130d	919 km 571 mi

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
Vehicle	Power	Acceleration	Top speed
BMW4 Series Convertible (G23)430i	258 hp 192 kW	6.2 s	Unrestricted 260 km/h162 mph Restricted 250 km/h155 mph
BMWX3 (G01 LCI)Facelift 202130d	249 hp 186 kW	5.9 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 (G23)430i

Power	258 hp 192 kW
0-100 km/h	6.2 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

BMWX3 (G01 LCI)Facelift 202130d

Power	249 hp 186 kW
0-100 km/h	5.9 s
Top speed 235 km/h 146 mph

Doors/seats	5 doors 5 seats
Trunk	550 L 19.4 cu ft
Length	4,708 mm 185.4 in
Height	1,676 mm 66.0 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 (G23)430i

Power	258 hp 192 kW
0-100 km/h	6.2 s
Top speed Unrestricted 260 km/h162 mph Restricted 250 km/h155 mph

6.4 L/100 km

36.8 mpg US

44.1 mpg UK

BMWX3 (G01 LCI)Facelift 202130d

Power	249 hp 186 kW
0-100 km/h	5.9 s
Top speed 235 km/h 146 mph

7.4 L/100 km

31.8 mpg US

38.2 mpg UK

BMW X3 (G01 LCI) Facelift 2021 30d 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 (G23)430i	6.4 L/100 km 36.8 mpg US 44.1 mpg UK	6.2 s
BMWX3 (G01 LCI)Facelift 202130d	7.4 L/100 km 31.8 mpg US 38.2 mpg UK	5.9 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 (G23)430i	150 hp/t 112 kW/t 6.6 kg/hp	6.4 L/100 km 36.8 mpg US 44.1 mpg UK
BMWX3 (G01 LCI)Facelift 202130d	129 hp/t 96 kW/t 7.8 kg/hp	7.4 L/100 km 31.8 mpg US 38.2 mpg UK

Detailed score breakdown

Vehicle

BMW4 Series Convertible (G23)430i

BMWX3 (G01 LCI)Facelift 202130d

Power

258 hp

192 kW

249 hp

186 kW

Torque

400 Nm

295 lb-ft

650 Nm

479 lb-ft

Acceleration

6.2 s

5.9 s

Top speed

Unrestricted

260 km/h162 mph

Restricted

250 km/h155 mph

235 km/h

146 mph

Lightness

1,715 kg

3,781 lb

1,935 kg

4,266 lb

Fuel consumption

6.4 L/100 km

36.8 mpg US

44.1 mpg UK

7.4 L/100 km

31.8 mpg US

38.2 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	550 L 19.4 cu ft
Length	4,708 mm 185.4 in
Height	1,676 mm 66.0 in

Range score

922 km

573 mi

919 km

571 mi

Trunk score

300 L

10.6 cu ft

550 L

19.4 cu ft

Power-to-weight score

150 hp/t

112 kW/t

6.6 kg/hp

129 hp/t

96 kW/t

7.8 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 (G23) 430i	BMW X3 (G01 LCI) Facelift 2021 30d
Consumption	6.4 L/100 km36.8 mpg US44.1 mpg UK	7.4 L/100 km31.8 mpg US38.2 mpg UK
Cost / 100 km	11.20 LC100 km	12.95 LC100 km
Cost / 100 mi	18.02 LC100 mi	20.84 LC100 mi
Annual fuel used	960 L254 US gal211 UK gal	1,110 L293 US gal244 UK gal
Annual fuel cost	1,680 LC/year	1,943 LC/year