Porsche Cayenne Coupe E3.1 vs BMW iX xDrive40: which is truly faster?

Off the line, the Cayenne Coupe hits 100 km/h in 5.77 s versus 6.04 s for the iX xDrive40. Despite lacking instant torque, 340 hp of power compensates. At this point, the Cayenne Coupe leads by 0.27 s and sits roughly 3 m ahead.

At 200 metres, the Cayenne Coupe is doing 131 km/h against 127 km/h for the iX xDrive40. The gap is 0.20 s. The gap remains stable from the start.

At 400 metres standing start, the Cayenne Coupe crosses the line in 13.99 s versus 14.36 s. The 0.37 s gap represents roughly 16 m of track - two to three car lengths.

Past 400 metres, the Cayenne Coupe continues to build its lead. At 600 metres, it runs at 181 km/h versus 175 km/h. At 1,000 metres, the Cayenne Coupe finishes in 25.67 s versus 26.37 s, with a 0.70 s lead.

Both rivals are electronically governed, but not at the same level: the Cayenne Coupe is capped at 243 km/h, the iX xDrive40 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 9.74 seconds. The 0.27 s difference in 0 to 100 km/h is mostly felt in motorway merging and overtaking.