Porsche Cayenne Turbo S 958.2 vs Porsche 911 Turbo 991.2: which is truly faster?

Off the line, the 911 Turbo hits 100 km/h in 3.04 s versus 3.96 s for the Cayenne Turbo S. At this point, the 911 Turbo leads by 0.92 s and sits roughly 8 m ahead.

At 200 metres, the 911 Turbo is doing 171 km/h against 152 km/h for the Cayenne Turbo S. The gap is 0.84 s. The gap remains stable from the start.

At 400 metres standing start, the 911 Turbo crosses the line in 10.79 s versus 12.11 s. The 1.33 s gap represents roughly 67 m of track - a gap visible to the naked eye.

Past 400 metres, the 911 Turbo continues to build its lead. At 600 metres, it runs at 238 km/h versus 211 km/h. At 1,000 metres, the 911 Turbo finishes in 19.64 s versus 22.13 s, with a 2.49 s lead.

Both rivals are electronically governed, but not at the same level: the Cayenne Turbo S is capped at 283 km/h, the 911 Turbo at 319 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.

With two combustion powertrains, the difference comes down to power-to-weight ratio (3.92 kg/hp vs 2.92 kg/hp) and transmission (Unknown vs Automatic).

In European road use (130 km/h max), both vehicles reach the legal speed limit in under 6.06 seconds. The 0.92 s difference in 0 to 100 km/h is mostly felt in motorway merging and overtaking.