Xpeng P7 vs Porsche 911 Carrera 4 Cabriolet 991.2 : 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 90%The P7 reaches 100 km/h first (4.21 s vs 4.37 s), but the 911 Carrera is ahead at every metre of the race. Explanation: the 911 Carrera accelerates harder at low speed and builds a distance gap before either car hits 100 km/h.
Why this result?
The Xpeng P7 is faster at 0-100 km/h, but the Porsche 911 Carrera 4 Cabriolet compensates at high speed thanks to higher peak power or top speed. At 400 m, Porsche 911 Carrera 4 Cabriolet leads by 0.13 s.
Calibrated physics simulation: SCx via VMax, power curves, Crr via WLTP, drivetrain losses. Manufacturer 0-100 is the calibration target. Confidence 90 %.
P7 vs 911 Carrera 4 Cabriolet: chronicle of a drag race at 283 km/h
The launch: 0 to 100 km/h
Off the line, the P7 hits 100 km/h in 4.22 s versus 4.37 s for the 911 Carrera 4 Cabriolet. The instant torque of 655 Nm from the electric motor makes the difference. At this point, the P7 leads by 0.15 s and sits roughly 5 m ahead.
From 100 km/h to 400 metres
At 200 metres, the P7 is doing 147 km/h against 152 km/h for the 911 Carrera 4 Cabriolet. The gap is 0.09 s. The gap remains stable from the start.
At 400 metres standing start, the 911 Carrera 4 Cabriolet crosses the line in 12.42 s versus 12.54 s. The 0.13 s gap represents roughly 6 m of track — barely a car length.
Beyond 400 metres: top speed comes into play
Past 400 metres, the 911 Carrera 4 Cabriolet continues to build its lead. At 600 metres, it runs at 212 km/h versus 170 km/h. At 1,000 metres, the 911 Carrera 4 Cabriolet finishes in 22.38 s versus 25.24 s, with a 2.86 s lead.
What the numbers don’t tell you
Both rivals are electronically governed, but not at the same level: the P7 is capped at 170 km/h, the 911 Carrera 4 Cabriolet at 288 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 6.49 seconds. The 0.15 s difference in 0 to 100 km/h is mostly felt in motorway merging and overtaking.
Xpeng P7 is slightly faster than the Porsche 911 Carrera 4 Cabriolet to 100 km/h. The edge holds on standing starts but may narrow at higher speeds depending on aerodynamic load.