Mercedes S 350 d 4MATIC Saloon, long version W223 vs Xpeng P7: which is truly faster?

Off the line, the S 350 d 4MATIC Saloon, long version hits 100 km/h in 5.47 s versus 6.58 s for the P7. Despite lacking instant torque, 313 hp of power compensates. At this point, the S 350 d 4MATIC Saloon, long version leads by 1.11 s and sits roughly 21 m ahead.

At 200 metres, the S 350 d 4MATIC Saloon, long version is doing 131 km/h against 127 km/h for the P7. The gap is 0.93 s. The challenger starts to claw back ground.

At 400 metres standing start, the S 350 d 4MATIC Saloon, long version crosses the line in 13.68 s versus 14.81 s. The 1.13 s gap represents roughly 48 m of track - a gap visible to the naked eye.

Past 400 metres, the S 350 d 4MATIC Saloon, long version continues to build its lead. At 600 metres, it runs at 185 km/h versus 170 km/h. At 1,000 metres, the S 350 d 4MATIC Saloon, long version finishes in 24.99 s versus 27.64 s, with a 2.65 s lead.

The S 350 d 4MATIC Saloon, long version features all-wheel drive (AWD) against the P7’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 S 350 d 4MATIC Saloon, long version is capped at 250 (i.e. 155 mph - industry threshold) km/h, the P7 at 170 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 10.18 seconds. The 1.11 s difference in 0 to 100 km/h is mostly felt in motorway merging and overtaking.