BMW X3 xDrive30i G01 vs BYD Dolphin Boost 150kW: which is truly faster?

Off the line, the X3 xDrive30i hits 100 km/h in 6.35 s versus 6.93 s for the Dolphin Boost 150kW. Despite lacking instant torque, 252 hp of power compensates. At this point, the X3 xDrive30i leads by 0.58 s and sits roughly 14 m ahead.

At 200 metres, the X3 xDrive30i is doing 126 km/h against 126 km/h for the Dolphin Boost 150kW. The gap is 0.53 s. The gap remains stable from the start.

At 400 metres standing start, the X3 xDrive30i crosses the line in 14.56 s versus 15.13 s. The 0.57 s gap represents roughly 24 m of track - two to three car lengths.

Past 400 metres, the X3 xDrive30i continues to build its lead. At 600 metres, it runs at 175 km/h versus 160 km/h. At 1,000 metres, the X3 xDrive30i finishes in 26.56 s versus 28.66 s, with a 2.10 s lead.

Both rivals are electronically governed, but not at the same level: the X3 xDrive30i is capped at 240 km/h, the Dolphin Boost 150kW at 160 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 10.58 seconds. The 0.58 s difference in 0 to 100 km/h is mostly felt in motorway merging and overtaking.