Alfa Romeo Stelvio Quadrifoglio vs Porsche 911 Carrera S 991.2 : which one is faster?
0-100 km/h, 400 m, 1000 m, top speed — physics simulation calibrated on 7 measures.
Simulation de performance
Race simulation at real speed
CONFIDENCE 96%The Stelvio Quadrifoglio reaches 100 km/h first (3.83 s vs 3.93 s), but the 911 Carrera is ahead at every metre of the race. Explanation: the 911 Carrera accelerates harder at low speed and builds a distance gap before either car hits 100 km/h.
Why this result?
The Alfa Romeo Stelvio Quadrifoglio is faster at 0-100 km/h, but the Porsche 911 Carrera S compensates at high speed thanks to higher peak power or top speed. At 400 m, Porsche 911 Carrera S leads by 0.09 s.
Calibrated physics simulation: SCx via VMax, power curves, Crr via WLTP, drivetrain losses. Manufacturer 0-100 is the calibration target. Confidence 96 %.
Stelvio Quadrifoglio vs 911 Carrera S: chronicle of a drag race at 307 km/h
The launch: 0 to 100 km/h
Off the line, the Stelvio Quadrifoglio hits 100 km/h in 3.83 s versus 3.93 s for the 911 Carrera S. At this point, the Stelvio Quadrifoglio leads by 0.10 s and sits roughly 5 m ahead.
From 100 km/h to 400 metres
At 200 metres, the Stelvio Quadrifoglio is doing 156 km/h against 162 km/h for the 911 Carrera S. The gap is 0.05 s. The gap remains stable from the start.
At 400 metres standing start, the 911 Carrera S crosses the line in 11.77 s versus 11.86 s. The 0.09 s gap represents roughly 5 m of track — barely a car length.
Beyond 400 metres: top speed comes into play
Past 400 metres, the 911 Carrera S continues to build its lead. At 600 metres, it runs at 225 km/h versus 216 km/h. At 1,000 metres, the 911 Carrera S finishes in 21.09 s versus 21.59 s, with a 0.50 s lead.
What the numbers don’t tell you
Both rivals are electronically governed, but not at the same level: the Stelvio Quadrifoglio is capped at 283 km/h, the 911 Carrera S at 307 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 (3.59 kg/hp vs 3.38 kg/hp) and transmission (Automatic vs Automatic).
In European road use (130 km/h max), both vehicles reach the legal speed limit in under 5.66 seconds. The 0.10 s difference in 0 to 100 km/h is mostly felt in motorway merging and overtaking.
Alfa Romeo Stelvio Quadrifoglio is slightly faster than the Porsche 911 Carrera S to 100 km/h. The edge holds on standing starts but may narrow at higher speeds depending on aerodynamic load.