BMW 430i xDrive Gran Coupé G22 vs BMW 120d F40: which is truly faster?

Off the line, the 120d hits 100 km/h in 7.38 s versus 7.79 s for the 430i xDrive Gran Coupé. At this point, the 120d leads by 0.41 s and sits roughly 15 m ahead.

At 200 metres, the 120d is doing 121 km/h against 124 km/h for the 430i xDrive Gran Coupé. The gap is 0.48 s. The gap remains stable from the start.

At 400 metres standing start, the 120d crosses the line in 15.41 s versus 15.75 s. The 0.34 s gap represents roughly 15 m of track - two to three car lengths.

Past 400 metres, the situation changes. Past 400 metres, both rivals hit the same electronic ceiling at 231 km/h. Neither can claw back ground through top speed - the outcome hinges on the acceleration curve between 100 and 231 km/h.

At 1,000 metres, the 430i xDrive Gran Coupé finishes in 27.85 s versus 27.90 s. The 0.05 s delta shows an extremely tight race.

Both rivals are electronically governed, but not at the same level: the 430i xDrive Gran Coupé is capped at 235 km/h, the 120d at 231 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 (6.94 kg/hp vs 7.63 kg/hp) and transmission (Automatic vs Automatic).

In European road use (130 km/h max), both vehicles reach the legal speed limit in under 11.54 seconds. The 0.41 s difference in 0 to 100 km/h is mostly felt in motorway merging and overtaking.