Bmw 640d xDrive Gran Turismo G32 vs Porsche Cayman (PDK) 987 : 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 Bmw 640d reaches 100 km/h first (5.36 s vs 5.58 s), but the Cayman (PDK) is ahead at every metre of the race. Explanation: the Cayman (PDK) accelerates harder at low speed and builds a distance gap before either car hits 100 km/h.
Why this result?
The Bmw 640d xDrive Gran Turismo is faster at 0-100 km/h, but the Porsche Cayman (PDK) compensates at high speed thanks to higher peak power or top speed. At 400 m, Porsche Cayman (PDK) leads by 0.03 s.
Calibrated physics simulation: SCx via VMax, power curves, Crr via WLTP, drivetrain losses. Manufacturer 0-100 is the calibration target. Confidence 94 %.
Bmw 640d xDrive Gran Turismo vs Cayman (PDK): chronicle of a drag race at 261 km/h
The launch: 0 to 100 km/h
Off the line, the Bmw 640d xDrive Gran Turismo hits 100 km/h in 5.36 s versus 5.58 s for the Cayman (PDK). At this point, the Bmw 640d xDrive Gran Turismo leads by 0.22 s and sits roughly 6 m ahead.
From 100 km/h to 400 metres
At 200 metres, the Bmw 640d xDrive Gran Turismo is doing 134 km/h against 137 km/h for the Cayman (PDK). The gap is 0.15 s. The gap remains stable from the start.
At 400 metres standing start, the Cayman (PDK) crosses the line in 13.65 s versus 13.68 s. The 0.03 s gap represents roughly 1 m of track
Beyond 400 metres: top speed comes into play
Past 400 metres, the Cayman (PDK) continues to build its lead. At 600 metres, it runs at 194 km/h versus 186 km/h. At 1,000 metres, the Cayman (PDK) finishes in 24.50 s versus 24.97 s, with a 0.47 s lead. Both vehicles have similar top speeds (250 vs 261 km/h), preventing any comeback.
What the numbers don’t tell you
Electronically capped at 250 km/h, the Bmw 640d xDrive Gran Turismo 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 (6.05 kg/hp vs 5.06 kg/hp) and transmission (Automatic vs Automatic).
In European road use (130 km/h max), both vehicles reach the legal speed limit in under 8.46 seconds. The 0.22 s difference in 0 to 100 km/h is mostly felt in motorway merging and overtaking.
Bmw 640d xDrive Gran Turismo is slightly faster than the Porsche Cayman (PDK) to 100 km/h. The edge holds on standing starts but may narrow at higher speeds depending on aerodynamic load.