Porsche 911 Carrera 4S 991.1 vs Bmw M240i Convertible : 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 95%Calibrated physics simulation: SCx via VMax, power curves, Crr via WLTP, drivetrain losses. Manufacturer 0-100 is the calibration target. Confidence 95 %.
911 Carrera 4S vs Bmw M240i Convertible: chronicle of a drag race at 298 km/h
The launch: 0 to 100 km/h
Off the line, the 911 Carrera 4S hits 100 km/h in 4.44 s versus 4.56 s for the Bmw M240i Convertible. At this point, the 911 Carrera 4S leads by 0.12 s and sits roughly 3 m ahead.
From 100 km/h to 400 metres
At 200 metres, the 911 Carrera 4S is doing 153 km/h against 148 km/h for the Bmw M240i Convertible. The gap is 0.20 s. The gap widens compared to the 0-100.
At 400 metres standing start, the 911 Carrera 4S crosses the line in 12.33 s versus 12.72 s. The 0.40 s gap represents roughly 20 m of track — two to three car lengths.
Beyond 400 metres: top speed comes into play
Past 400 metres, the 911 Carrera 4S continues to build its lead. At 600 metres, it runs at 217 km/h versus 206 km/h. At 1,000 metres, the 911 Carrera 4S finishes in 22.01 s versus 22.97 s, with a 0.95 s lead.
What the numbers don’t tell you
Both rivals are electronically governed, but not at the same level: the 911 Carrera 4S is capped at 298 km/h, the Bmw M240i Convertible at 250 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 (3.56 kg/hp vs 4.81 kg/hp) and transmission (Manual vs Automatic).
In European road use (130 km/h max), both vehicles reach the legal speed limit in under 6.72 seconds. The 0.12 s difference in 0 to 100 km/h is mostly felt in motorway merging and overtaking.
Porsche 911 Carrera 4S is slightly faster than the Bmw M240i Convertible to 100 km/h. The edge holds on standing starts but may narrow at higher speeds depending on aerodynamic load.