Porsche 911 GT3 991.1 vs Porsche Cayenne Diesel 958.2: which is truly faster?

Off the line, the 911 GT3 hits 100 km/h in 4.08 s versus 7.11 s for the Cayenne Diesel. At this point, the 911 GT3 leads by 3.04 s and sits roughly 17 m ahead.

At 200 metres, the 911 GT3 is doing 158 km/h against 118 km/h for the Cayenne Diesel. The gap is 1.96 s. The challenger starts to claw back ground.

At 400 metres standing start, the 911 GT3 crosses the line in 11.85 s versus 15.22 s. The 3.37 s gap represents roughly 129 m of track - a gap visible to the naked eye.

Past 400 metres, the 911 GT3 continues to build its lead. At 600 metres, it runs at 225 km/h versus 163 km/h. At 1,000 metres, the 911 GT3 finishes in 21.23 s versus 28.17 s, with a 6.94 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 (3.16 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 3.04 s difference in 0 to 100 km/h is mostly felt in motorway merging and overtaking.