Sur 0–100 km/h, 125i F20LCI gagne (6,15 s vs 6,27 s).
Performance comparison
Simulated drag race 0 → 1,000 m in real time. Synchronised speed counters and stopwatch. Physics calibration on 7 manufacturer measurements.
Simulation
Calibration
Physics model calibrated on manufacturer splits. The limited top speed is not the real aerodynamic top speed of the vehicles.
| 128ti F40 | 125i F20LCI | |
|---|---|---|
| 0–100 km/h | 6,27 s | 6,15 s+0,12 s |
| 400 m standing start | 14,44 s | 14,36 s+0,08 s |
| 1,000 m standing start | 25,87 s−0,04 s | 25,91 s |
| Top speed (electronically limited) | 250 km/h+7 km/h | 243 km/h |
| Power-to-weight ratio | 5,45 kg/hpbetter ratio | 6,25 kg/hp |
Standing-start drag race, calibrated on manufacturer splits. The gap shows at each stage.
Simulated performance at each stage. Winner in green.
| Palier | 128ti F40 | 125i F20LCI |
|---|---|---|
| 0–30 km/h | 1,81 s | 1,66 stight gap |
| 0–50 km/h | 3,01 s | 2,77 s |
| 0–80 km/h | 4,76 s | 4,57 s |
| 0–100 km/h | 6,27 s | 6,15 stight gap |
| 0–120 km/h | 8,20 s | 8,17 stight gap |
| 0–160 km/h | 13,63 s | 13,86 s |
| 0–200 km/h | 22,97 s | 23,72 s |
| 400 m standing start | 14,44 s | 14,36 stight gap |
| 1,000 m standing start | 25,87 s | 25,91 stight gap |
| Top speed limited | 250 km/h | 243 km/h |
Manufacturer technical specifications. The power-to-weight ratio is the key physical factor in a drag race.
| Characteristic | Value | Detail |
|---|---|---|
| Power | 265 hp | 4 cyl |
| Torque | 400 Nm | |
| Weight | 1 445 kg | manufacturer kerb weight |
| Drivetrain | — | |
| Gearbox | Eight-speed Steptronic Sport transmission |
| Characteristic | Value | Detail |
|---|---|---|
| Power | 224 hp | 4 cyl |
| Torque | 310 Nm | |
| Weight | 1 400 kg | manufacturer kerb weight |
| Drivetrain | — | |
| Gearbox | 8-speed Steptronic |
Off the line, the Bmw 125i hits 100 km/h in 6.15 s versus 6.27 s for the Bmw 128ti. At this point, the Bmw 125i leads by 0.12 s and sits roughly 5 m ahead.
At 200 metres, the Bmw 125i is doing 131 km/h against 132 km/h for the Bmw 128ti. The gap is 0.14 s. The gap remains stable from the start.
At 400 metres standing start, the Bmw 125i crosses the line in 14.35 s versus 14.44 s. The 0.08 s gap represents roughly 4 m of track — barely a car length.
Past 400 metres, the situation changes. The Bmw 125i maxes out at 243 km/h while the Bmw 128ti keeps accelerating towards 250 (i.e. 155 mph — industry threshold) km/h. At 600 metres, the gap has dropped to 0.04 s.
Around 782 metres, both vehicles are level. This is the inversion point: the Bmw 128ti overcomes its launch deficit thanks to a 7 km/h higher top speed.
At 1,000 metres, the Bmw 128ti finishes in 25.86 s versus 25.91 s. The 0.04 s delta shows an extremely tight race.
Both rivals are electronically governed, but not at the same level: the Bmw 128ti is capped at 250 (i.e. 155 mph — industry threshold) km/h, the Bmw 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 (5.45 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 0.12 s difference in 0 to 100 km/h is mostly felt in motorway merging and overtaking.
Swap one of the two models to explore an equivalent duel in the same segment.
Sur 0–100 km/h, 125i F20LCI gagne (6,15 s vs 6,27 s).
128ti F40 passe de 0 à 100 km/h en 6,27 secondes (simulation calibrée).
128ti F40 : 265 hp, ratio 5,45 kg/hp. 125i F20LCI : 224 hp, ratio 6,25 kg/hp.
128ti F40 : 250 km/h. 125i F20LCI : 243 km/h.