Bmw X7 M50d vs Porsche 718 Cayman S : 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 92%Calibrated physics simulation: SCx via VMax, power curves, Crr via WLTP, drivetrain losses. Manufacturer 0-100 is the calibration target. Confidence 92 %.
Bmw X7 M50d vs 718 Cayman S: chronicle of a drag race at 285 km/h
The launch: 0 to 100 km/h
Off the line, the 718 Cayman S hits 100 km/h in 4.17 s versus 5.49 s for the Bmw X7 M50d. At this point, the 718 Cayman S leads by 1.33 s and sits roughly 8 m ahead.
From 100 km/h to 400 metres
At 200 metres, the 718 Cayman S is doing 156 km/h against 132 km/h for the Bmw X7 M50d. The gap is 0.97 s. The challenger starts to claw back ground.
At 400 metres standing start, the 718 Cayman S crosses the line in 12.12 s versus 13.82 s. The 1.70 s gap represents roughly 75 m of track — a gap visible to the naked eye.
Beyond 400 metres: top speed comes into play
Past 400 metres, the 718 Cayman S continues to build its lead. At 600 metres, it runs at 215 km/h versus 184 km/h. At 1,000 metres, the 718 Cayman S finishes in 21.89 s versus 25.28 s, with a 3.38 s lead.
What the numbers don’t tell you
Both rivals are electronically governed, but not at the same level: the Bmw X7 M50d is capped at 250 km/h, the 718 Cayman S at 285 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 (6.15 kg/hp vs 3.87 kg/hp) and transmission (Automatic vs Automatic).
In European road use (130 km/h max), both vehicles reach the legal speed limit in under 8.69 seconds. The 1.33 s difference in 0 to 100 km/h is mostly felt in motorway merging and overtaking.
Porsche 718 Cayman S has a clear edge over the Bmw X7 M50d to 100 km/h. This difference is clearly noticeable in spirited driving and widens on standing starts.