Xpeng G9 vs Porsche Cayenne Diesel 958.2 : 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%Calibrated physics simulation: SCx via VMax, power curves, Crr via WLTP, drivetrain losses. Manufacturer 0-100 is the calibration target. Confidence 95 %.
G9 vs Cayenne Diesel: chronicle of a drag race at 217 km/h
The launch: 0 to 100 km/h
Off the line, the Cayenne Diesel hits 100 km/h in 7.11 s versus 8.51 s for the G9. Despite lacking instant torque, 262 hp of power compensates. At this point, the Cayenne Diesel leads by 1.40 s and sits roughly 31 m ahead.
From 100 km/h to 400 metres
At 200 metres, the Cayenne Diesel is doing 118 km/h against 120 km/h for the G9. The gap is 1.20 s. The challenger starts to claw back ground.
At 400 metres standing start, the Cayenne Diesel crosses the line in 15.22 s versus 16.32 s. The 1.10 s gap represents roughly 45 m of track — a gap visible to the naked eye.
Beyond 400 metres: top speed comes into play
Past 400 metres, the gap narrows. The G9 maxes out at 200 km/h while the Cayenne Diesel keeps accelerating towards 217 km/h. At 600 metres, the gap is down to 0.94 s from 1.10 s at 400 metres.
At 1,000 metres, the Cayenne Diesel finishes in 28.17 s versus 28.71 s, with just 0.53 s to spare. The G9 fails to fully close the launch gap.
What the numbers don’t tell you
The Cayenne Diesel features all-wheel drive (AWD) against the G9’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 G9 is capped at 200 km/h, the Cayenne Diesel at 217 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.
Instant electric torque gives an advantage off the line. The higher top speed of the combustion engine gives an advantage over longer distances. The distance at which one catches the other depends on the top speed differential.
In European road use (130 km/h max), both vehicles reach the legal speed limit in under 12.63 seconds. The 1.40 s difference in 0 to 100 km/h is mostly felt in motorway merging and overtaking.
Porsche Cayenne Diesel has a clear edge over the Xpeng G9 to 100 km/h. This difference is clearly noticeable in spirited driving and widens on standing starts.