Porsche 911 R 991.2 vs Porsche Cayenne Diesel 958.2: which is truly faster?

Off the line, the 911 R hits 100 km/h in 3.78 s versus 7.11 s for the Cayenne Diesel. At this point, the 911 R leads by 3.33 s and sits roughly 15 m ahead.

At 200 metres, the 911 R is doing 166 km/h against 118 km/h for the Cayenne Diesel. The gap is 2.20 s. The challenger starts to claw back ground.

At 400 metres standing start, the 911 R crosses the line in 11.38 s versus 15.22 s. The 3.84 s gap represents roughly 146 m of track - a gap visible to the naked eye.

Past 400 metres, the 911 R continues to build its lead. At 600 metres, it runs at 239 km/h versus 163 km/h. At 1,000 metres, the 911 R finishes in 20.19 s versus 28.17 s, with a 7.98 s lead.

Electronically capped at 217 km/h, the Cayenne Diesel never reaches its natural aerodynamic ceiling in this duel. That’s not a physical limit of the motor - it’s a deliberate manufacturer decision, typically tied to standard-fit tyre ratings or model-range positioning.

With two combustion powertrains, the difference comes down to power-to-weight ratio (2.74 kg/hp vs 8.05 kg/hp) and transmission (Manual vs Unknown).

In European road use (130 km/h max), both vehicles reach the legal speed limit in under 11.83 seconds. The 3.33 s difference in 0 to 100 km/h is mostly felt in motorway merging and overtaking.