Porsche Panamera Turbo vs Porsche 911 Carrera Cabriolet 991.2: which is truly faster?

Off the line, the Panamera Turbo hits 100 km/h in 4.03 s versus 4.43 s for the 911 Carrera Cabriolet. At this point, the Panamera Turbo leads by 0.40 s and sits roughly 6 m ahead.

At 200 metres, the Panamera Turbo is doing 156 km/h against 153 km/h for the 911 Carrera Cabriolet. The gap is 0.32 s. The gap remains stable from the start.

At 400 metres standing start, the Panamera Turbo crosses the line in 12.02 s versus 12.42 s. The 0.40 s gap represents roughly 21 m of track - two to three car lengths.

Past 400 metres, the Panamera Turbo continues to build its lead. At 600 metres, it runs at 216 km/h versus 214 km/h. At 1,000 metres, the Panamera Turbo finishes in 21.74 s versus 22.28 s, with a 0.53 s lead. Both vehicles have similar top speeds (298 vs 286 km/h), preventing any comeback.

The Panamera Turbo features all-wheel drive (AWD) against the 911 Carrera Cabriolet’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 Panamera Turbo is capped at 303 km/h, the 911 Carrera Cabriolet at 291 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 (3.58 kg/hp vs 4.00 kg/hp) and transmission (Automatic vs Automatic).

In European road use (130 km/h max), both vehicles reach the legal speed limit in under 6.39 seconds. The 0.40 s difference in 0 to 100 km/h is mostly felt in motorway merging and overtaking.