Porsche Panamera Turbo S 970.1 vs Bmw M850i 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 94%The Panamera Turbo reaches 100 km/h first (3.85 s vs 3.98 s), but the Bmw M850i is ahead at every metre of the race. Explanation: the Bmw M850i accelerates harder at low speed and builds a distance gap before either car hits 100 km/h.
Why this result?
The Porsche Panamera Turbo S is faster at 0-100 km/h, but the Bmw M850i xDrive Convertible compensates at high speed thanks to higher peak power or top speed. At 400 m, Bmw M850i xDrive Convertible leads by 0.22 s.
Calibrated physics simulation: SCx via VMax, power curves, Crr via WLTP, drivetrain losses. Manufacturer 0-100 is the calibration target. Confidence 94 %.
Panamera Turbo S vs Bmw M850i xDrive Convertible: chronicle of a drag race at 280 km/h
The launch: 0 to 100 km/h
Off the line, the Panamera Turbo S hits 100 km/h in 3.85 s versus 3.98 s for the Bmw M850i xDrive Convertible. At this point, the Panamera Turbo S leads by 0.13 s and sits roughly 6 m ahead.
From 100 km/h to 400 metres
At 200 metres, the Panamera Turbo S is doing 151 km/h against 160 km/h for the Bmw M850i xDrive Convertible. The gap is 0.04 s. The gap remains stable from the start.
At 400 metres standing start, the Bmw M850i xDrive Convertible crosses the line in 11.83 s versus 12.05 s. The 0.22 s gap represents roughly 11 m of track — two to three car lengths.
Beyond 400 metres: top speed comes into play
Past 400 metres, the Bmw M850i xDrive Convertible continues to build its lead. At 600 metres, it runs at 225 km/h versus 208 km/h. At 1,000 metres, the Bmw M850i xDrive Convertible finishes in 21.19 s versus 22.19 s, with a 1.00 s lead. Despite a higher top speed (280 km/h), the Panamera Turbo S never recovers its launch deficit.
What the numbers don’t tell you
Both rivals are electronically governed, but not at the same level: the Panamera Turbo S is capped at 306 km/h, the Bmw M850i 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 (3.17 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 5.95 seconds. The 0.13 s difference in 0 to 100 km/h is mostly felt in motorway merging and overtaking.
Porsche Panamera Turbo S is slightly faster than the Bmw M850i xDrive Convertible to 100 km/h. The edge holds on standing starts but may narrow at higher speeds depending on aerodynamic load.