Porsche 911 Targa 4S 991.1 vs Bmw X3 M40d G01 : 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 97%Calibrated physics simulation: SCx via VMax, power curves, Crr via WLTP, drivetrain losses. Manufacturer 0-100 is the calibration target. Confidence 97 %.
911 Targa 4S vs Bmw X3 M40d: chronicle of a drag race at 295 km/h
The launch: 0 to 100 km/h
Off the line, the 911 Targa 4S hits 100 km/h in 4.53 s versus 4.78 s for the Bmw X3 M40d. Despite the faster sprint time, the Bmw X3 M40d is 1 m further along the track at this moment: stronger low-speed acceleration offsets a slower run beyond 100 km/h.
From 100 km/h to 400 metres
At 200 metres, the 911 Targa 4S is doing 150 km/h against 138 km/h for the Bmw X3 M40d. The gap is 0.21 s. The gap remains stable from the start.
At 400 metres standing start, the 911 Targa 4S crosses the line in 12.49 s versus 13.12 s. The 0.64 s gap represents roughly 30 m of track — two to three car lengths.
Beyond 400 metres: top speed comes into play
Past 400 metres, the 911 Targa 4S continues to build its lead. At 600 metres, it runs at 213 km/h versus 191 km/h. At 1,000 metres, the 911 Targa 4S finishes in 22.38 s versus 24.13 s, with a 1.75 s lead.
What the numbers don’t tell you
Both rivals are electronically governed, but not at the same level: the 911 Targa 4S is capped at 295 km/h, the Bmw X3 M40d 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 (3.83 kg/hp vs 5.94 kg/hp) and transmission (Manual vs Automatic).
In European road use (130 km/h max), both vehicles reach the legal speed limit in under 7.56 seconds. The 0.25 s difference in 0 to 100 km/h is mostly felt in motorway merging and overtaking.
Porsche 911 Targa 4S is slightly faster than the Bmw X3 M40d to 100 km/h. The edge holds on standing starts but may narrow at higher speeds depending on aerodynamic load.