BMW 550e xDrive G60 vs BMW 120d xDrive F40: which is truly faster?

Off the line, the 550e xDrive hits 100 km/h in 4.24 s versus 7.13 s for the 120d xDrive. The instant torque of 700 Nm from the electric motor makes the difference. At this point, the 550e xDrive leads by 2.89 s and sits roughly 14 m ahead.

At 200 metres, the 550e xDrive is doing 153 km/h against 119 km/h for the 120d xDrive. The gap is 1.72 s. The challenger starts to claw back ground.

At 400 metres standing start, the 550e xDrive crosses the line in 12.27 s versus 15.21 s. The 2.94 s gap represents roughly 115 m of track - a gap visible to the naked eye.

Past 400 metres, the 550e xDrive continues to build its lead. At 600 metres, it runs at 216 km/h versus 164 km/h. At 1,000 metres, the 550e xDrive finishes in 21.96 s versus 27.99 s, with a 6.04 s lead.

Both rivals are electronically governed, but not at the same level: the 550e xDrive is capped at 250 (i.e. 155 mph - industry threshold) km/h, the 120d xDrive at 230 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.

Instant electric torque gives an advantage off the line. The higher top speed of the combustion engine gives an advantage over longer distances. The distance at which one catches the other depends on the top speed differential.

In European road use (130 km/h max), both vehicles reach the legal speed limit in under 11.69 seconds. The 2.89 s difference in 0 to 100 km/h is mostly felt in motorway merging and overtaking.