Ferrari Portofino vs Porsche 911 Turbo Cabriolet 991.2: which is truly faster?

Off the line, the 911 Turbo Cabriolet hits 100 km/h in 3.14 s versus 3.55 s for the Portofino. At this point, the 911 Turbo Cabriolet leads by 0.41 s and sits roughly 7 m ahead.

At 200 metres, the 911 Turbo Cabriolet is doing 169 km/h against 177 km/h for the Portofino. The gap is 0.18 s. The challenger starts to claw back ground.

At 400 metres standing start, the Portofino crosses the line in 10.92 s versus 10.93 s. The 0.01 s gap represents roughly 1 m of track

Past 400 metres, the Portofino continues to build its lead. At 600 metres, it runs at 249 km/h versus 235 km/h. At 1,000 metres, the Portofino finishes in 19.36 s versus 19.88 s, with a 0.52 s lead.

On paper, the Portofino combines 600 hp, 760 Nm and 1,545 kg — a clear theoretical edge over the 911 Turbo Cabriolet. Yet the 911 Turbo Cabriolet launches quicker. At standstill, both motors deliver peak torque from 0 rpm: the decisive factor is no longer raw power, but available grip. If the 911 Turbo Cabriolet has a better traction coefficient (tyres, weight distribution, traction control calibration), it puts down more force despite inferior specs — exactly what the simulation reflects, calibrated on manufacturer 0-100 km/h times.

Electronically capped at 319 km/h, the 911 Turbo Cabriolet 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 (2.58 kg/hp vs 3.04 kg/hp) and transmission (Automatic vs Automatic).

In European road use (130 km/h max), both vehicles reach the legal speed limit in under 4.72 seconds. The 0.41 s difference in 0 to 100 km/h is mostly felt in motorway merging and overtaking.