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A430dHybridvsB420dDiesel
  • MotorwayMotorwayRange and charging
  • PerformancePerformance0-100, top speed
  • ConsumptionConsumptionYearly cost
  • Specs430d · 420d

BMW 430d Convertible G22 vs BMW 420d Convertible G22: which is truly faster?

Simulated drag race 0 → 1,000 m in real time. Synchronised speed counters and stopwatch. Physics calibration on 7 manufacturer measurements.

saloon · 2021 vs 2021 · Methodology
BMWHybridFaster

430d Convertible G22

286 hp · 650 Nm · 1,880 kg · 2021

VS
BMWDiesel

420d Convertible G22

190 hp · 400 Nm · 1,775 kg · 2021

Result · 0–100 km/h

ABMW 430d Convertible G22

5.70 s

Gap2.05 sin favour of 430d Convertible
BBMW 420d Convertible G22

7.75 s

Summary · Caralogy simulation
Measure430d Convertible G22420d Convertible G22Gap
0–100 km/h5.70 s7.75 s2.05 s · 430d Convertible G22
400 m standing start14.00 s15.64 s1.64 s · 430d Convertible G22
1,000 m standing start25.64 s28.69 s3.05 s · 430d Convertible G22
Top speed (electronically limited)250 km/h236 km/h14 km/h · 430d Convertible G22
Power-to-weight ratio6.57 kg/hp9.34 kg/hpbetter ratio · 430d Convertible G22

Watch the race

Standing-start drag race, calibrated on manufacturer splits. The gap shows at each stage.

BMWHybrid430d Convertible G22
Speed
0km/h
Timer
0,00s
Distance
0m
BMWDiesel420d Convertible G22
Speed
0km/h
Timer
0,00s
Distance
0m
100 m
200 m
300 m
400 m
500 m
600 m
700 m
800 m
900 m
1000 m
0m → 1000m
Gap0m

Stage-by-stage comparison

Simulated performance at each stage. Best value in bold.
Stage430d Convertible G22420d Convertible G22
0–30 km/h1.25 s1.52 s
0–50 km/h2.09 s2.64 s
0–80 km/h3.98 s5.29 s
0–100 km/h5.70 s7.75 s
0–120 km/h7.87 s10.87 s
0–160 km/h13.93 s20.11 s
0–200 km/h23.66 s37.54 s
400 m standing start14.00 s15.64 s
1,000 m standing start25.64 s28.69 s
Top speed limited250 km/h236 km/h

Parameters and assumptions

Simulation

Start
Standing, straight line
Surface
Dry asphalt, 23°C
Wind
None
Driver
1 person, 75 kg

Calibration

Splits
0–100, 0–200 manufacturer
Power curve
Real measurement (Caralogy)
VMax
Manufacturer limited
Transmission
Losses integrated in model

Physics model calibrated on manufacturer splits. The limited top speed is not the real aerodynamic top speed of the vehicles.

Under the bonnet

Manufacturer technical specifications. The power-to-weight ratio is the key physical factor in a drag race.

BMW

430d Convertible G22

6,57kg/hpratio better by 2,77 kg/hp
CharacteristicValueDetail
Power286 hp6 cyl
Torque650 Nm
Weight1 880 kgmanufacturer kerb weight
Drivetrain-
GearboxEight-speed Steptronic transmission
BMW

420d Convertible G22

9,34kg/hpcompensated by −105 kg
CharacteristicValueDetail
Power190 hp4 cyl
Torque400 Nm
Weight1 775 kgmanufacturer kerb weight
Drivetrain-
GearboxEight-speed Steptronic transmission

The start: 0 to 100 km/h

Off the line, the 430d Convertible hits 100 km/h in 5.70 s versus 7.75 s for the 420d Convertible. At this point, the 430d Convertible leads by 2.05 s and sits roughly 16 m ahead.

From 100 km/h to 400 metres

At 200 metres, the 430d Convertible is doing 129 km/h against 116 km/h for the 420d Convertible. The gap is 1.05 s. The challenger starts to claw back ground.

At 400 metres standing start, the 430d Convertible crosses the line in 13.99 s versus 15.64 s. The 1.65 s gap represents roughly 64 m of track - a gap visible to the naked eye.

Beyond 400 metres: top speed comes into play

Past 400 metres, the 430d Convertible continues to build its lead. At 600 metres, it runs at 180 km/h versus 161 km/h. At 1,000 metres, the 430d Convertible finishes in 25.64 s versus 28.69 s, with a 3.05 s lead. Both vehicles have similar top speeds (250 (i.e. 155 mph - industry threshold) vs 236 km/h), preventing any comeback.

What the numbers don’t tell you

Both rivals are electronically governed, but not at the same level: the 430d Convertible is capped at 250 (i.e. 155 mph - industry threshold) km/h, the 420d Convertible at 236 km/h. This isn’t a physical engine limit - it’s a manufacturer choice, usually for tyre safety or homologation reasons. Neither car reaches its true aerodynamic top speed.

With two combustion powertrains, the difference comes down to power-to-weight ratio (6.57 kg/hp vs 9.34 kg/hp) and transmission (Automatic vs Automatic).

In European road use (130 km/h max), both vehicles reach the legal speed limit in under 12.82 seconds. The 2.05 s difference in 0 to 100 km/h is mostly felt in motorway merging and overtaking.

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Frequently asked questions

Over 0–100 km/h, 430d Convertible G22 wins (5,70 s vs 7,75 s).

430d Convertible G22 goes from 0 to 100 km/h in 5,70 seconds (calibrated simulation).

430d Convertible G22: 286 hp, ratio 6,57 kg/hp. 420d Convertible G22: 190 hp, ratio 9,34 kg/hp.

430d Convertible G22: 250 km/h. 420d Convertible G22: 236 km/h.