Over 0–100 km/h, 125d F20LCI wins (6,48 s vs 7,62 s).
Simulated drag race 0 → 1,000 m in real time. Synchronised speed counters and stopwatch. Physics calibration on 7 manufacturer measurements.
| Measure | 125d F20LCI | 420i Steptronic Gran Coupe G22 | Gap |
|---|---|---|---|
| 0–100 km/h | 6.48 s | 7.62 s | 1.14 s · 125d F20LCI |
| 400 m standing start | 14.68 s | 15.55 s | 0.87 s · 125d F20LCI |
| 1,000 m standing start | 26.40 s | 28.34 s | 1.94 s · 125d F20LCI |
| Top speed (electronically limited) | 240 km/h | 236 km/h | 4 km/h · 125d F20LCI |
| Power-to-weight ratio | 6.61 kg/hp | 8.53 kg/hp | better ratio · 125d F20LCI |
Standing-start drag race, calibrated on manufacturer splits. The gap shows at each stage.
| Stage | 125d F20LCI | 420i Steptronic Gran Coupe G22 |
|---|---|---|
| 0–30 km/h | 1.88 s | 1.65 s |
| 0–50 km/h | 3.03 s | 2.79 s |
| 0–80 km/h | 4.83 s | 5.28 s |
| 0–100 km/h | 6.48 s | 7.62 s |
| 0–120 km/h | 8.57 s | 10.51 s |
| 0–160 km/h | 14.58 s | 19.00 s |
| 0–200 km/h | 25.23 s | 34.76 s |
| 400 m standing start | 14.68 s | 15.55 s |
| 1,000 m standing start | 26.40 s | 28.34 s |
| Top speed | 240 km/h | 236 km/h |
Physics model calibrated on manufacturer splits. The limited top speed is not the real aerodynamic top speed of the vehicles.
Manufacturer technical specifications. The power-to-weight ratio is the key physical factor in a drag race.
| Characteristic | Value | Detail |
|---|---|---|
| Power | 224 hp | 4 cyl |
| Torque | 450 Nm | |
| Weight | 1 480 kg | manufacturer kerb weight |
| Drivetrain | - | |
| Gearbox | 8-speed Steptronic |
| Characteristic | Value | Detail |
|---|---|---|
| Power | 184 hp | 4 cyl |
| Torque | 270 Nm | |
| Weight | 1 570 kg | manufacturer kerb weight |
| Drivetrain | - | |
| Gearbox | 8-speed Steptronic |
Off the line, the 125d hits 100 km/h in 6.48 s versus 7.62 s for the 420i Steptronic Gran Coupe. At this point, the 125d leads by 1.14 s and sits roughly 1 m ahead.
At 200 metres, the 125d is doing 130 km/h against 118 km/h for the 420i Steptronic Gran Coupe. The gap is 0.38 s. The challenger starts to claw back ground.
At 400 metres standing start, the 125d crosses the line in 14.67 s versus 15.55 s. The 0.87 s gap represents roughly 35 m of track - a gap visible to the naked eye.
Past 400 metres, the 125d continues to build its lead. At 600 metres, it runs at 180 km/h versus 164 km/h. At 1,000 metres, the 125d finishes in 26.39 s versus 28.34 s, with a 1.95 s lead. Both vehicles have similar top speeds (240 vs 236 km/h), preventing any comeback.
Both rivals are electronically governed, but not at the same level: the 125d is capped at 240 km/h, the 420i Steptronic Gran Coupe 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 (6.61 kg/hp vs 8.53 kg/hp) and transmission (Automatic vs Automatic).
In European road use (130 km/h max), both vehicles reach the legal speed limit in under 12.25 seconds. The 1.14 s difference in 0 to 100 km/h is mostly felt in motorway merging and overtaking.
Over 0–100 km/h, 125d F20LCI wins (6,48 s vs 7,62 s).
125d F20LCI goes from 0 to 100 km/h in 6,48 seconds (calibrated simulation).
125d F20LCI: 224 hp, ratio 6,61 kg/hp. 420i Steptronic Gran Coupe G22: 184 hp, ratio 8,53 kg/hp.
125d F20LCI: 240 km/h. 420i Steptronic Gran Coupe G22: 236 km/h.