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  • Specs230i · 125i

BMW 230i Convertible F22 vs BMW 125i F20LCI: 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.

compact · 2018 vs 2018 · Methodology
BMWPetrolFaster

230i Convertible F22

252 hp · 350 Nm · 1,575 kg · 2018

VS
BMWPetrol

125i F20LCI

224 hp · 310 Nm · 1,400 kg · 2018

Result · 0–100 km/h

ABMW 230i Convertible F22

5.86 s

Gap0.29 sin favour of 230i Convertible
BBMW 125i F20LCI

6.15 s

Summary · Caralogy simulation
Measure230i Convertible F22125i F20LCIGap
0–100 km/h5.86 s6.15 s0.29 s · 230i Convertible F22
400 m standing start14.21 s14.36 s0.15 s · 230i Convertible F22
1,000 m standing start26.01 s25.91 s0.10 s · 125i F20LCI
Top speed (electronically limited)250 km/h243 km/h7 km/h · 230i Convertible F22
Power-to-weight ratio6.25 kg/hp6.25 kg/hpSame

Watch the race

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

BMWPetrol230i Convertible F22
Speed
0km/h
Timer
0,00s
Distance
0m
BMWPetrol125i F20LCI
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.
Stage230i Convertible F22125i F20LCI
0–30 km/h1.38 s1.66 s
0–50 km/h2.29 s2.77 s
0–80 km/h4.18 s4.57 s
0–100 km/h5.86 s6.15 s
0–120 km/h8.10 s · tight gap8.17 s
0–160 km/h14.44 s13.86 s
0–200 km/h24.93 s23.72 s
400 m standing start14.21 s · tight gap14.36 s
1,000 m standing start26.01 s25.91 s · tight gap
Top speed limited250 km/h243 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

230i Convertible F22

6,25kg/hpcompensated by −175 kg
CharacteristicValueDetail
Power252 hp4 cyl
Torque350 Nm
Weight1 575 kgmanufacturer kerb weight
Drivetrain-
Gearbox8-speed Steptronic
BMW

125i F20LCI

6,25kg/hpcompensated by −175 kg
CharacteristicValueDetail
Power224 hp4 cyl
Torque310 Nm
Weight1 400 kgmanufacturer kerb weight
Drivetrain-
Gearbox8-speed Steptronic

The start: 0 to 100 km/h

Off the line, the 230i Convertible hits 100 km/h in 5.86 s versus 6.15 s for the 125i. At this point, the 230i Convertible leads by 0.29 s and sits roughly 8 m ahead.

From 100 km/h to 400 metres

At 200 metres, the 230i Convertible is doing 129 km/h against 131 km/h for the 125i. The gap is 0.26 s. The gap remains stable from the start.

At 400 metres standing start, the 230i Convertible crosses the line in 14.21 s versus 14.35 s. The 0.14 s gap represents roughly 7 m of track - barely a car length.

Beyond 400 metres: top speed comes into play

Past 400 metres, the situation changes. The 125i maxes out at 243 km/h while the 230i Convertible keeps accelerating towards 250 (i.e. 155 mph - industry threshold) km/h. At 600 metres, the gap has dropped to 0.05 s.

Around 711 metres, both vehicles are level. This is the inversion point: the 125i overcomes its launch deficit thanks to a 7 km/h higher top speed.

At 1,000 metres, the 125i finishes in 25.91 s versus 26.01 s. The 0.10 s delta shows an extremely tight race.

What the numbers don’t tell you

Both rivals are electronically governed, but not at the same level: the 230i Convertible is capped at 250 (i.e. 155 mph - industry threshold) km/h, the 125i at 243 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 (6.25 kg/hp vs 6.25 kg/hp) and transmission (Automatic vs Automatic).

In European road use (130 km/h max), both vehicles reach the legal speed limit in under 9.35 seconds. The 0.29 s difference in 0 to 100 km/h is mostly felt in motorway merging and overtaking.

Compare with other alternatives

Swap one of the two models to explore an equivalent duel in the same segment.

Instead of 125i F20LCI
Audi A3 allstreetAudi A3 Sportback TFSI quattro S tronic 150 kW

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Frequently asked questions

Over 0–100 km/h, 230i Convertible F22 wins (5,86 s vs 6,15 s).

230i Convertible F22 goes from 0 to 100 km/h in 5,86 seconds (calibrated simulation).

230i Convertible F22: 252 hp, ratio 6,25 kg/hp. 125i F20LCI: 224 hp, ratio 6,25 kg/hp.

230i Convertible F22: 250 km/h. 125i F20LCI: 243 km/h.