BMW X3 M40i G01 vs BYD Atto 3 Extended Range: which is truly faster?

Off the line, the X3 M40i hits 100 km/h in 4.78 s versus 7.41 s for the Atto 3 Extended Range. Despite lacking instant torque, 360 hp of power compensates. At this point, the X3 M40i leads by 2.63 s and sits roughly 24 m ahead.

At 200 metres, the X3 M40i is doing 142 km/h against 121 km/h for the Atto 3 Extended Range. The gap is 1.72 s. The challenger starts to claw back ground.

At 400 metres standing start, the X3 M40i crosses the line in 13.02 s versus 15.57 s. The 2.55 s gap represents roughly 101 m of track - a gap visible to the naked eye.

Past 400 metres, the X3 M40i continues to build its lead. At 600 metres, it runs at 197 km/h versus 160 km/h. At 1,000 metres, the X3 M40i finishes in 23.67 s versus 29.19 s, with a 5.52 s lead.

Both rivals are electronically governed, but not at the same level: the X3 M40i is capped at 250 (i.e. 155 mph - industry threshold) km/h, the Atto 3 Extended Range 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 11.71 seconds. The 2.63 s difference in 0 to 100 km/h is mostly felt in motorway merging and overtaking.