Car comparison

BMW 4 Series Gran Coupe (G26) 430dvsBMW 4 Series Convertible (G23) 430i

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

New comparison

BMW 4 Series Gran Coupe (G26)

430d

286 hp2993 ccDieselAWDAutomaticTurbochargedCoupe2022-2024
VS

BMW 4 Series Convertible (G23)

430i

258 hp1998 ccGasolineRWDAutomaticTurbochargedCabriolet / convertible2020-2024

Comparison overview

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

Best choices

BMW 4 Series Gran Coupe (G26) 430d

  • Quickest 0-100 km/h
    5.3 s
  • 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
  • Best power-to-weight
    155 hp/t
    116 kW/t
    6.5 kg/hp
  • Lowest combined fuel consumption
    6.0 L/100 km
    39.2 mpg US
    47.1 mpg UK
  • Best estimated range
    983 km
    611 mi
  • Largest trunk
    470 L
  • Best overall score
    70/100
  • Best performance score
    70/100
  • Best economy score
    91/100
  • Best practicality score
    69/100

Specification comparison

Specification comparison
ModelBMW4 Series Gran Coupe (G26)430dBMW4 Series Convertible (G23)430i
Power
286hp213kW
258hp192kW
Torque
650Nm479lb-ft
400Nm295lb-ft
Curb weight
1,845kg4,068lb
1,715kg3,781lb
Gross weight
2,400kg5,291lb
2,200kg4,850lb
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Calculated
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Calculated
To 99% top speed
75.0s99% target: 257 km/h / 160 mph
Calculated
88.4s99% target: 257 km/h / 160 mph
Calculated
0-100 km/h
5.3s
6.2s
0-200 km/h
19.5s
Calculated
22.9s
Calculated
0-60 mph
5.0s
Calculated
5.9s
Calculated
Fuel consumption
6L/100 km39.2mpg US47.1mpg UK
6.4L/100 km36.8mpg US44.1mpg UK
Fuel consumption city-
7.8L/100 km30.2mpg US36.2mpg UK
Fuel consumption highway-
5.6L/100 km42mpg US50.4mpg UK
Quarter mile
13.5s
Calculated
14.3s
Calculated
Power-to-weight
155hp/t116kW/t70hp/1000 lb
Calculated
150hp/t112kW/t68hp/1000 lb
Calculated
Torque-to-weight
352Nm/t236lb-ft/ton
Calculated
233Nm/t156lb-ft/ton
Calculated
Estimated range
983km611mi
Calculated
922km573mi
Calculated
Displacement
2,993cc183cu in
1,998cc122cu in
Length
4,783mm188in
4,768mm188in
Width
1,852mm73in
1,852mm73in
Height
1,442mm57in
1,384mm54in
Wheelbase
2,856mm112in
2,851mm112in
Front track
1,597mm63in
1,575mm62in
Rear track
1,624mm64in
1,611mm63in
Ground clearance
140mm6in
124mm5in
Trunk volume
470L
300L
Max trunk volume
1,290L
385L
Doors
5
2
Seats
5
4
Fuel tank
59L
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 Gran Coupe (G26) 430dBMW 4 Series Convertible (G23) 430iPowerTorque
  • BMW 4 Series Gran Coupe (G26) 430d: Power / Torque
  • BMW 4 Series Convertible (G23) 430i: Power / Torque
Dyno simulation data table
VehiclePeak power RPMPeak torque RPMMax engine speed
BMW4 Series Gran Coupe (G26)430d4,000 rpm1,500-2,500 rpm4,250 rpm
BMW4 Series Convertible (G23)430i5,000-6,500 rpm1,550-4,400 rpm6,750 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
MetricBMW4 Series Gran Coupe (G26)430dBMW4 Series Convertible (G23)430i
Acceleration checkpoints
0-60 mph
0-97 km/h
5.0 s
5.9 s
0-100 km/h
0-62 mph
5.3 s
6.2 s
0-200 km/h
0-124 mph
19.5 s
22.9 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Limited
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Likely limited
Drag race simulation
60 ft
18 m
2.2 s
2.3 s
330 ft
101 m
5.8 s
6.2 s
1/8 mile
201 m
8.8 s
9.3 s
1000 ft
305 m
11.3 s
12.0 s
1/4 mile
402 m
13.5 s
14.3 s
Trap speed
1/4 mile
402 m
171 km/h
106 mph
163 km/h
101 mph

Power comparison

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

Chart data table
VehicleValue
BMW4 Series Gran Coupe (G26)430d
286 hp
213 kW
BMW4 Series Convertible (G23)430i
258 hp
192 kW

BMW 4 Series Gran Coupe (G26) 430d has 28 hp more than BMW 4 Series Convertible (G23) 430i.

The biggest power difference is between BMW 4 Series Convertible (G23) 430i and BMW 4 Series Gran Coupe (G26) 430d: 28 hp (21 kW).

Torque comparison

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

Chart data table
VehicleValue
BMW4 Series Gran Coupe (G26)430d
650 Nm
479 lb-ft
BMW4 Series Convertible (G23)430i
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)430d
1,845 kg
4,068 lb
BMW4 Series Convertible (G23)430i
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)430d
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
BMW4 Series Convertible (G23)430i
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 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)430d5.3 s
BMW4 Series Convertible (G23)430i6.2 s

The biggest 0-100 km/h difference is between BMW 4 Series Gran Coupe (G26) 430d and BMW 4 Series Convertible (G23) 430i: 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 Gran Coupe (G26)430d
6.0 L/100 km
39.2 mpg US
47.1 mpg UK
BMW4 Series Convertible (G23)430i
6.4 L/100 km
36.8 mpg US
44.1 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 Gran Coupe (G26)430d
155 hp/t
116 kW/t
6.5 kg/hp
BMW4 Series Convertible (G23)430i
150 hp/t
112 kW/t
6.6 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)430d
983 km
611 mi
BMW4 Series Convertible (G23)430i
922 km
573 mi

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
VehiclePowerAccelerationTop speed
BMW4 Series Gran Coupe (G26)430d
286 hp
213 kW
5.3 s
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
BMW4 Series Convertible (G23)430i
258 hp
192 kW
6.2 s
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 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)430d
Power
286 hp
213 kW
0-100 km/h5.3 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 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 (G23)430i
Power
258 hp
192 kW
0-100 km/h6.2 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

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)430d
Power
286 hp
213 kW
0-100 km/h5.3 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
BMW4 Series Convertible (G23)430i
Power
258 hp
192 kW
0-100 km/h6.2 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

BMW 4 Series Gran Coupe (G26) 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 Gran Coupe (G26)430d
6.0 L/100 km
39.2 mpg US
47.1 mpg UK
5.3 s
BMW4 Series Convertible (G23)430i
6.4 L/100 km
36.8 mpg US
44.1 mpg UK
6.2 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)430d
155 hp/t
116 kW/t
6.5 kg/hp
6.0 L/100 km
39.2 mpg US
47.1 mpg UK
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

Detailed score breakdown

Detailed score breakdown
VehicleBMW4 Series Gran Coupe (G26)430dBMW4 Series Convertible (G23)430i
Power
286 hp
213 kW
258 hp
192 kW
Torque
650 Nm
479 lb-ft
400 Nm
295 lb-ft
Acceleration
5.3 s
6.2 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Lightness
1,845 kg
4,068 lb
1,715 kg
3,781 lb
Fuel consumption
6.0 L/100 km
39.2 mpg US
47.1 mpg UK
6.4 L/100 km
36.8 mpg US
44.1 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
300 L
10.6 cu ft
Length
4,768 mm
187.7 in
Height
1,384 mm
54.5 in
Range score
983 km
611 mi
922 km
573 mi
Trunk score
470 L
16.6 cu ft
300 L
10.6 cu ft
Power-to-weight score
155 hp/t
116 kW/t
6.5 kg/hp
150 hp/t
112 kW/t
6.6 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) 430dBMW 4 Series Convertible (G23) 430i
Consumption6 L/100 km39.2 mpg US47.1 mpg UK6.4 L/100 km36.8 mpg US44.1 mpg UK
Cost / 100 km10.50 LC100 km11.20 LC100 km
Cost / 100 mi16.90 LC100 mi18.02 LC100 mi
Annual fuel used900 L238 US gal198 UK gal960 L254 US gal211 UK gal
Annual fuel cost1,575 LC/year1,680 LC/year

Head-to-head comparisons

BMW 4 Series Gran Coupe (G26) 430d

  • Has 28 hp more
  • Has 250 Nm more
  • Is 0.9 s quicker from 0-100 km/h
  • Uses 0.4 L/100 km less fuel
  • Has 5 hp/t better power-to-weight
  • Has 61 km (38 mi) more estimated range
  • Has 170 L more trunk volume

Pros

  • Quickest 0-100 km/h in this comparison
  • Highest top speed
  • Most powerful
  • Highest torque
  • Lowest combined fuel consumption
  • Best power-to-weight ratio
  • Best estimated range
  • Largest trunk

Cons

  • Heaviest

Choose cars to compare

Brand
Model
Generation
Engine or modification
BMW 4 Series Gran Coupe (G26) 430d
BMW 4 Series Convertible (G23) 430i
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