Porsche Panamera S 970.1 vs Bmw 840d xDrive Convertible G15 : 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 95%The Bmw 840d reaches 100 km/h first (5.06 s vs 5.16 s), but the Panamera S is ahead at every metre of the race. Explanation: the Panamera S accelerates harder at low speed and builds a distance gap before either car hits 100 km/h.
Why this result?
The Bmw 840d xDrive Convertible is faster at 0-100 km/h, but the Porsche Panamera S compensates at high speed thanks to higher peak power or top speed. At 400 m, Porsche Panamera S leads by 0.04 s.
Calibrated physics simulation: SCx via VMax, power curves, Crr via WLTP, drivetrain losses. Manufacturer 0-100 is the calibration target. Confidence 95 %.
Panamera S vs Bmw 840d xDrive Convertible: chronicle of a drag race at 277 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 5.16 s for the Panamera S. The 0.10 s gap is negligible: both vehicles are neck and neck.
From 100 km/h to 400 metres
At 200 metres, the Bmw 840d xDrive Convertible is doing 137 km/h against 140 km/h for the Panamera S. The gap is 0.10 s. The gap remains stable from the start.
At 400 metres standing start, the Panamera S crosses the line in 13.31 s versus 13.36 s. The 0.04 s gap represents roughly 2 m of track — barely a car length.
Beyond 400 metres: top speed comes into play
Past 400 metres, the Panamera S continues to build its lead. At 600 metres, it runs at 197 km/h versus 192 km/h. At 1,000 metres, the Panamera S finishes in 23.98 s versus 24.31 s, with a 0.33 s lead.
What the numbers don’t tell you
Both rivals are electronically governed, but not at the same level: the Panamera S is capped at 283 km/h, the Bmw 840d xDrive Convertible 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 (4.43 kg/hp vs 5.97 kg/hp) and transmission (Automatic vs Automatic).
In European road use (130 km/h max), both vehicles reach the legal speed limit in under 7.89 seconds. The 0.10 s difference in 0 to 100 km/h is mostly felt in motorway merging and overtaking.
Porsche Panamera S and Bmw 840d xDrive Convertible 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.