Bmw X5 xDrive45e G05 vs Porsche Cayman S 981 : 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 X5 xDrive45e vs Cayman S: chronicle of a drag race at 278 km/h
The launch: 0 to 100 km/h
Off the line, the Cayman S hits 100 km/h in 4.90 s versus 5.57 s for the Bmw X5 xDrive45e. The 0.68 s gap is negligible: both vehicles are neck and neck.
From 100 km/h to 400 metres
At 200 metres, the Cayman S is doing 147 km/h against 131 km/h for the Bmw X5 xDrive45e. The gap is 0.40 s. The challenger starts to claw back ground.
At 400 metres standing start, the Cayman S crosses the line in 12.90 s versus 13.86 s. The 0.96 s gap represents roughly 42 m of track — a gap visible to the naked eye.
Beyond 400 metres: top speed comes into play
Past 400 metres, the Cayman S continues to build its lead. At 600 metres, it runs at 205 km/h versus 180 km/h. At 1,000 metres, the Cayman S finishes in 23.17 s versus 25.56 s, with a 2.39 s lead.
What the numbers don’t tell you
Electronically capped at 235 km/h, the Bmw X5 xDrive45e never reaches its natural aerodynamic ceiling in this duel. That’s not a physical limit of the motor — it’s a deliberate manufacturer decision, typically tied to standard-fit tyre ratings or model-range positioning.
With two combustion powertrains, the difference comes down to power-to-weight ratio (6.18 kg/hp vs 4.00 kg/hp) and transmission (Automatic vs Unknown).
In European road use (130 km/h max), both vehicles reach the legal speed limit in under 8.88 seconds. The 0.68 s difference in 0 to 100 km/h is mostly felt in motorway merging and overtaking.
Porsche Cayman S has a clear edge over the Bmw X5 xDrive45e to 100 km/h. This difference is clearly noticeable in spirited driving and widens on standing starts.