BYD Dolphin Boost 150kW vs BMW 320i Sedan G20: which is truly faster?

Off the line, the Dolphin Boost 150kW hits 100 km/h in 6.93 s versus 7.02 s for the 320i Sedan. The instant torque of 290 Nm from the electric motor makes the difference. The 0.09 s gap is negligible: both vehicles are neck and neck.

At 200 metres, the 320i Sedan is doing 120 km/h against 126 km/h for the Dolphin Boost 150kW. The gap is 0.30 s. The gap widens compared to the 0-100.

At 400 metres standing start, the 320i Sedan crosses the line in 15.09 s versus 15.13 s. The 0.05 s gap represents roughly 2 m of track - barely a car length.

Past 400 metres, the 320i Sedan continues to build its lead. At 600 metres, it runs at 160 km/h versus 166 km/h. At 1,000 metres, the 320i Sedan finishes in 27.74 s versus 28.66 s, with a 0.91 s lead.

Both rivals are electronically governed, but not at the same level: the Dolphin Boost 150kW is capped at 160 km/h, the 320i Sedan at 235 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 11.48 seconds. The 0.09 s difference in 0 to 100 km/h is mostly felt in motorway merging and overtaking.