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 91%The Bmw 840d reaches 100 km/h first (5.06 s vs 5.19 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.
Calibrated physics simulation: SCx via VMax, power curves, Crr via WLTP, drivetrain losses. Manufacturer 0-100 is the calibration target. Confidence 91 %.
Panamera S vs Bmw 840d xDrive Convertible: chronicle of a drag race at 276 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 5.19 s for the Panamera S. At this point, the Bmw 840d xDrive Convertible leads by 0.13 s and sits roughly 5 m ahead.
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 0.12 s. The gap remains stable from the start.
At 400 metres standing start, the Panamera S crosses the line in 13.35 s versus 13.36 s. The 0.01 s gap represents roughly 0 m of track
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 196 km/h versus 192 km/h. At 1,000 metres, the Panamera S finishes in 24.06 s versus 24.31 s, with a 0.25 s lead.
What the numbers don’t tell you
The Bmw 840d xDrive Convertible features all-wheel drive (AWD) against the Panamera S’s RWD. At low speeds (0-30, 0-50, 0-80 km/h), AWD doubles the driven contact area: all four wheels transmit torque to the road, virtually eliminating wheelspin at launch. This traction advantage is decisive in the range where the motor delivers peak torque, before power and aerodynamics take over.
Both rivals are electronically governed, but not at the same level: the Panamera S is capped at 282 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 0.13 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.