Cupra Born vs BMW 420i Convertible G22: which is truly faster?

Off the line, the Born hits 100 km/h in 7.23 s versus 8.14 s for the 420i Convertible. The instant torque of 310 Nm from the electric motor makes the difference. At this point, the Born leads by 0.91 s and sits roughly 3 m ahead.

At 200 metres, the Born is doing 122 km/h against 115 km/h for the 420i Convertible. The gap is 0.30 s. The challenger starts to claw back ground.

At 400 metres standing start, the Born crosses the line in 15.39 s versus 15.96 s. The 0.57 s gap represents roughly 23 m of track - two to three car lengths.

Past 400 metres, the situation changes. The Born maxes out at 160 km/h while the 420i Convertible keeps accelerating towards 236 km/h. At 600 metres, the gap has dropped to 0.69 s.

Around 995 metres, both vehicles are level. This is the inversion point: the 420i Convertible overcomes its launch deficit thanks to a 76 km/h higher top speed.

At 1,000 metres, the 420i Convertible finishes in 28.97 s versus 28.98 s. The 0.02 s delta shows an extremely tight race.

Both rivals are electronically governed, but not at the same level: the Born is capped at 160 km/h, the 420i Convertible at 236 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 13.10 seconds. The 0.91 s difference in 0 to 100 km/h is mostly felt in motorway merging and overtaking.