Bmw 840d xDrive Convertible G15 vs Porsche Cayenne (Tiptronic S) 958.1 : 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 96%Calibrated physics simulation: SCx via VMax, power curves, Crr via WLTP, drivetrain losses. Manufacturer 0-100 is the calibration target. Confidence 96 %.
Bmw 840d xDrive Convertible vs Cayenne (Tiptronic S): chronicle of a drag race at 250 km/h
The launch: 0 to 100 km/h
Off the line, the Bmw 840d xDrive Convertible hits 100 km/h in 5.06 s versus 8.05 s for the Cayenne (Tiptronic S). At this point, the Bmw 840d xDrive Convertible leads by 2.99 s and sits roughly 19 m ahead.
From 100 km/h to 400 metres
At 200 metres, the Bmw 840d xDrive Convertible is doing 137 km/h against 117 km/h for the Cayenne (Tiptronic S). The gap is 1.59 s. The challenger starts to claw back ground.
At 400 metres standing start, the Bmw 840d xDrive Convertible crosses the line in 13.36 s versus 15.79 s. The 2.43 s gap represents roughly 94 m of track — a gap visible to the naked eye.
Beyond 400 metres: top speed comes into play
Past 400 metres, the Bmw 840d xDrive Convertible continues to build its lead. At 600 metres, it runs at 192 km/h versus 163 km/h. At 1,000 metres, the Bmw 840d xDrive Convertible finishes in 24.31 s versus 28.75 s, with a 4.43 s lead.
What the numbers don’t tell you
Both rivals are electronically governed, but not at the same level: the Bmw 840d xDrive Convertible is capped at 250 km/h, the Cayenne (Tiptronic S) at 227 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 (5.97 kg/hp vs 7.38 kg/hp) and transmission (Automatic vs Automatic).
In European road use (130 km/h max), both vehicles reach the legal speed limit in under 12.92 seconds. The 2.99 s difference in 0 to 100 km/h is mostly felt in motorway merging and overtaking.
Bmw 840d xDrive Convertible has a clear edge over the Porsche Cayenne (Tiptronic S) to 100 km/h. This difference is clearly noticeable in spirited driving and widens on standing starts.