Porsche Cayenne S 958.2 vs Bmw X7 M50d : 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
CONFIDENCE 93%Calibrated physics simulation: SCx via VMax, power curves, Crr via WLTP, drivetrain losses. Manufacturer 0-100 is the calibration target. Confidence 93 %.
Cayenne S vs Bmw X7 M50d: chronicle of a drag race at 251 km/h
The launch: 0 to 100 km/h
Off the line, the Cayenne S hits 100 km/h in 5.13 s versus 5.49 s for the Bmw X7 M50d. At this point, the Cayenne S leads by 0.37 s and sits roughly 3 m ahead.
From 100 km/h to 400 metres
At 200 metres, the Cayenne S is doing 137 km/h against 132 km/h for the Bmw X7 M50d. The gap is 0.20 s. The challenger starts to claw back ground.
At 400 metres standing start, the Cayenne S crosses the line in 13.45 s versus 13.82 s. The 0.37 s gap represents roughly 17 m of track — two to three car lengths.
Beyond 400 metres: top speed comes into play
Past 400 metres, the Cayenne S continues to build its lead. At 600 metres, it runs at 191 km/h versus 184 km/h. At 1,000 metres, the Cayenne S finishes in 24.50 s versus 25.28 s, with a 0.78 s lead. Both vehicles have similar top speeds (251 vs 250 km/h), preventing any comeback.
What the numbers don’t tell you
Both rivals are electronically governed, but not at the same level: the Cayenne S is capped at 257 km/h, the Bmw X7 M50d at 250 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 (4.96 kg/hp vs 6.15 kg/hp) and transmission (Unknown vs Automatic).
In European road use (130 km/h max), both vehicles reach the legal speed limit in under 8.69 seconds. The 0.37 s difference in 0 to 100 km/h is mostly felt in motorway merging and overtaking.
Porsche Cayenne S is slightly faster than the Bmw X7 M50d to 100 km/h. The edge holds on standing starts but may narrow at higher speeds depending on aerodynamic load.