Porsche 2020 911 Carrera S Cabriolet 992 vs Bmw M340i xDrive Touring G20 : 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 %.
2020 911 Carrera S Cabriolet vs Bmw M340i xDrive Touring: chronicle of a drag race at 306 km/h
The launch: 0 to 100 km/h
Off the line, the 2020 911 Carrera S Cabriolet hits 100 km/h in 3.64 s versus 4.58 s for the Bmw M340i xDrive Touring. At this point, the 2020 911 Carrera S Cabriolet leads by 0.95 s and sits roughly 7 m ahead.
From 100 km/h to 400 metres
At 200 metres, the 2020 911 Carrera S Cabriolet is doing 161 km/h against 145 km/h for the Bmw M340i xDrive Touring. The gap is 0.73 s. The challenger starts to claw back ground.
At 400 metres standing start, the 2020 911 Carrera S Cabriolet crosses the line in 11.58 s versus 12.74 s. The 1.16 s gap represents roughly 57 m of track — a gap visible to the naked eye.
Beyond 400 metres: top speed comes into play
Past 400 metres, the 2020 911 Carrera S Cabriolet continues to build its lead. At 600 metres, it runs at 223 km/h versus 203 km/h. At 1,000 metres, the 2020 911 Carrera S Cabriolet finishes in 21.03 s versus 23.11 s, with a 2.08 s lead.
What the numbers don’t tell you
Both rivals are electronically governed, but not at the same level: the 2020 911 Carrera S Cabriolet is capped at 306 km/h, the Bmw M340i xDrive Touring 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 (3.57 kg/hp vs 4.73 kg/hp) and transmission (Automatic vs Automatic).
In European road use (130 km/h max), both vehicles reach the legal speed limit in under 6.92 seconds. The 0.95 s difference in 0 to 100 km/h is mostly felt in motorway merging and overtaking.
Porsche 2020 911 Carrera S Cabriolet has a clear edge over the Bmw M340i xDrive Touring to 100 km/h. This difference is clearly noticeable in spirited driving and widens on standing starts.