Xpeng X9 vs Porsche 911 Targa 4 GTS 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 97%The 911 Targa reaches 100 km/h first (3.66 s vs 3.88 s), but the X9 is ahead at every metre of the race. Explanation: the X9 accelerates harder at low speed and builds a distance gap before either car hits 100 km/h.
Reading the duel
At 400 m, Xpeng X9 leads by 0.23 s. At 1 000 m, Porsche 911 Targa 4 GTS takes the lead by 1.20 s.
Calibrated physics simulation: SCx via VMax, power curves, Crr via WLTP, drivetrain losses. Manufacturer 0-100 is the calibration target. Confidence 97 %.
X9 vs 911 Targa 4 GTS: chronicle of a drag race at 307 km/h
The launch: 0 to 100 km/h
Off the line, the 911 Targa 4 GTS hits 100 km/h in 3.66 s versus 3.88 s for the X9. Despite lacking instant torque, 456 hp of power compensates. At this point, the 911 Targa 4 GTS leads by 0.22 s and sits roughly 5 m ahead.
From 100 km/h to 400 metres
At 200 metres, the X9 is doing 173 km/h against 162 km/h for the 911 Targa 4 GTS. The gap is 0.01 s. The challenger starts to claw back ground.
At 400 metres standing start, the X9 crosses the line in 11.34 s versus 11.57 s. The 0.23 s gap represents roughly 13 m of track — two to three car lengths.
Beyond 400 metres: top speed comes into play
Past 400 metres, the situation changes. The X9 maxes out at 200 km/h while the 911 Targa 4 GTS keeps accelerating towards 307 km/h. At 600 metres, the gap has dropped to 0.00 s.
Around 601 metres, both vehicles are level. This is the inversion point: the 911 Targa 4 GTS overcomes its launch deficit thanks to a 107 km/h higher top speed.
At 1,000 metres, the 911 Targa 4 GTS finishes in 20.93 s versus 22.13 s. The 1.20 s delta in favour of the 911 Targa 4 GTS shows that top speed makes a clear difference.
What the numbers don’t tell you
On paper, the X9 combines 543 hp, 717 Nm and 1,338 kg — a clear theoretical edge over the 911 Targa 4 GTS. Yet the 911 Targa 4 GTS launches quicker. At standstill, both motors deliver peak torque from 0 rpm: the decisive factor is no longer raw power, but available grip. If the 911 Targa 4 GTS has a better traction coefficient (tyres, weight distribution, traction control calibration), it puts down more force despite inferior specs — exactly what the simulation reflects, calibrated on manufacturer 0-100 km/h times.
Both rivals are electronically governed, but not at the same level: the X9 is capped at 200 km/h, the 911 Targa 4 GTS at 307 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 5.34 seconds. The 0.22 s difference in 0 to 100 km/h is mostly felt in motorway merging and overtaking.
Porsche 911 Targa 4 GTS is slightly faster than the Xpeng X9 to 100 km/h. The edge holds on standing starts but may narrow at higher speeds depending on aerodynamic load.