Bmw X7 xDrive50i vs Porsche Cayenne S E-Hybrid 958.2 : which one is faster?
0-100 km/h, 400 m, 1000 m, top speed — physics simulation calibrated on 7 measures.
Simulation de performance
Race simulation at real speed
0Calibrated physics simulation: SCx via VMax, power curves, Crr via WLTP, drivetrain losses. Manufacturer 0-100 is the calibration target. Confidence 0 %.
Bmw X7 xDrive50i vs Cayenne S E-Hybrid: chronicle of a drag race at 250 km/h
The launch: 0 to 100 km/h
Off the line, the Bmw X7 xDrive50i hits 100 km/h in 5.24 s versus 5.57 s for the Cayenne S E-Hybrid. Despite the faster sprint time, the Cayenne S E-Hybrid is 3 m further along the track at this moment: stronger low-speed acceleration offsets a slower run beyond 100 km/h.
From 100 km/h to 400 metres
At 200 metres, the Bmw X7 xDrive50i is doing 138 km/h against 131 km/h for the Cayenne S E-Hybrid. The gap is 0.08 s. The challenger starts to claw back ground.
At 400 metres standing start, the Bmw X7 xDrive50i crosses the line in 13.47 s versus 13.82 s. The 0.35 s gap represents roughly 16 m of track — two to three car lengths.
Beyond 400 metres: top speed comes into play
Past 400 metres, the Bmw X7 xDrive50i continues to build its lead. At 600 metres, it runs at 192 km/h versus 180 km/h. At 1,000 metres, the Bmw X7 xDrive50i finishes in 24.42 s versus 25.54 s, with a 1.12 s lead. Both vehicles have similar top speeds (250 vs 237 km/h), preventing any comeback.
What the numbers don’t tell you
Both rivals are electronically governed, but not at the same level: the Bmw X7 xDrive50i is capped at 250 km/h, the Cayenne S E-Hybrid at 243 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.
With two combustion powertrains, the difference comes down to power-to-weight ratio (5.32 kg/hp vs 5.57 kg/hp) and transmission (Automatic vs Unknown).
In European road use (130 km/h max), both vehicles reach the legal speed limit in under 8.76 seconds. The 0.33 s difference in 0 to 100 km/h is mostly felt in motorway merging and overtaking.
Bmw X7 xDrive50i and Porsche Cayenne S E-Hybrid are virtually tied to 100 km/h. The gap is under a tenth of a second — only the physics engine can settle it step by step.