BYD Dolphin Boost 150kW vs Volvo XC40 B4: which is truly faster?

Off the line, the Dolphin Boost 150kW hits 100 km/h in 6.93 s versus 8.23 s for the XC40 B4. The instant torque of 290 Nm from the electric motor makes the difference. At this point, the Dolphin Boost 150kW leads by 1.30 s and sits roughly 5 m ahead.

At 200 metres, the Dolphin Boost 150kW is doing 126 km/h against 115 km/h for the XC40 B4. The gap is 0.50 s. The challenger starts to claw back ground.

At 400 metres standing start, the Dolphin Boost 150kW crosses the line in 15.13 s versus 16.10 s. The 0.97 s gap represents roughly 38 m of track — a gap visible to the naked eye.

Past 400 metres, the gap narrows. The Dolphin Boost 150kW maxes out at 160 km/h while the XC40 B4 keeps accelerating towards 180 km/h. At 600 metres, the gap is down to 1.22 s from 0.97 s at 400 metres.

At 1,000 metres, the Dolphin Boost 150kW finishes in 28.66 s versus 29.39 s, with just 0.73 s to spare. The XC40 B4 fails to fully close the launch gap.

Both rivals are electronically governed, but not at the same level: the Dolphin Boost 150kW is capped at 160 km/h, the XC40 B4 at 180 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 13.40 seconds. The 1.30 s difference in 0 to 100 km/h is mostly felt in motorway merging and overtaking.