Porsche 911 Turbo S Cabriolet 997.2 vs Bmw X7 xDrive50i : which one is faster?
0-100 km/h, 400 m, 1000 m, top speed — physics simulation calibrated on 7 measures.
400 mSimulation de performance
Race simulation at real speed
CONFIDENCE 100%Calibrated physics simulation: SCx via VMax, power curves, Crr via WLTP, drivetrain losses. Manufacturer 0-100 is the calibration target. Confidence 100 %.
911 Turbo S Cabriolet vs Bmw X7 xDrive50i: chronicle of a drag race at 312 km/h
The launch: 0 to 100 km/h
Off the line, the 911 Turbo S Cabriolet hits 100 km/h in 3.30 s versus 5.24 s for the Bmw X7 xDrive50i. At this point, the 911 Turbo S Cabriolet leads by 1.94 s and sits roughly 14 m ahead.
From 100 km/h to 400 metres
At 200 metres, the 911 Turbo S Cabriolet is doing 170 km/h against 138 km/h for the Bmw X7 xDrive50i. The gap is 1.57 s. The challenger starts to claw back ground.
At 400 metres standing start, the 911 Turbo S Cabriolet crosses the line in 11.04 s versus 13.47 s. The 2.43 s gap represents roughly 110 m of track — a gap visible to the naked eye.
Beyond 400 metres: top speed comes into play
Past 400 metres, the 911 Turbo S Cabriolet continues to build its lead. At 600 metres, it runs at 235 km/h versus 192 km/h. At 1,000 metres, the 911 Turbo S Cabriolet finishes in 20.00 s versus 24.42 s, with a 4.42 s lead.
What the numbers don’t tell you
Both rivals are electronically governed, but not at the same level: the 911 Turbo S Cabriolet is capped at 312 km/h, the Bmw X7 xDrive50i 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 (3.09 kg/hp vs 5.32 kg/hp) and transmission (Unknown vs Automatic).
In European road use (130 km/h max), both vehicles reach the legal speed limit in under 7.97 seconds. The 1.94 s difference in 0 to 100 km/h is mostly felt in motorway merging and overtaking.
Porsche 911 Turbo S Cabriolet has a clear edge over the Bmw X7 xDrive50i to 100 km/h. This difference is clearly noticeable in spirited driving and widens on standing starts.