Bmw 840i G15 vs Xpeng P7i : which one is faster?

The launch: 0 to 100 km/h

Off the line, the Bmw 840i hits 100 km/h in 5.12 s versus 6.31 s for the P7i. Despite lacking instant torque, 333 hp of power compensates. At this point, the Bmw 840i leads by 1.19 s and sits roughly 11 m ahead.

From 100 km/h to 400 metres

At 200 metres, the Bmw 840i is doing 140 km/h against 129 km/h for the P7i. The gap is 0.78 s. The challenger starts to claw back ground.

At 400 metres standing start, the Bmw 840i crosses the line in 13.33 s versus 14.56 s. The 1.23 s gap represents roughly 53 m of track — a gap visible to the naked eye.

Beyond 400 metres: top speed comes into play

Past 400 metres, the Bmw 840i continues to build its lead. At 600 metres, it runs at 196 km/h versus 178 km/h. At 1,000 metres, the Bmw 840i finishes in 24.04 s versus 26.38 s, with a 2.34 s lead.

What the numbers don’t tell you

Both rivals are electronically governed, but not at the same level: the Bmw 840i is capped at 250 km/h, the P7i at 200 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 9.78 seconds. The 1.19 s difference in 0 to 100 km/h is mostly felt in motorway merging and overtaking.