Porsche 911 Targa 4 GTS 991.2 vs Bmw X4 M40i G02 : 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%Calibrated physics simulation: SCx via VMax, power curves, Crr via WLTP, drivetrain losses. Manufacturer 0-100 is the calibration target. Confidence 96 %.
911 Targa 4 GTS vs Bmw X4 M40i: chronicle of a drag race at 302 km/h
The launch: 0 to 100 km/h
Off the line, the 911 Targa 4 GTS hits 100 km/h in 4.27 s versus 4.75 s for the Bmw X4 M40i. At this point, the 911 Targa 4 GTS leads by 0.48 s and sits roughly 3 m ahead.
From 100 km/h to 400 metres
At 200 metres, the 911 Targa 4 GTS is doing 155 km/h against 142 km/h for the Bmw X4 M40i. The gap is 0.43 s. The gap remains stable from the start.
At 400 metres standing start, the 911 Targa 4 GTS crosses the line in 12.12 s versus 12.98 s. The 0.86 s gap represents roughly 42 m of track — a gap visible to the naked eye.
Beyond 400 metres: top speed comes into play
Past 400 metres, the 911 Targa 4 GTS continues to build its lead. At 600 metres, it runs at 221 km/h versus 198 km/h. At 1,000 metres, the 911 Targa 4 GTS finishes in 21.61 s versus 23.62 s, with a 2.01 s lead.
What the numbers don’t tell you
Both rivals are electronically governed, but not at the same level: the 911 Targa 4 GTS is capped at 302 km/h, the Bmw X4 M40i 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 (3.59 kg/hp vs 5.18 kg/hp) and transmission (Automatic vs Automatic).
In European road use (130 km/h max), both vehicles reach the legal speed limit in under 7.22 seconds. The 0.48 s difference in 0 to 100 km/h is mostly felt in motorway merging and overtaking.
Porsche 911 Targa 4 GTS has a clear edge over the Bmw X4 M40i to 100 km/h. This difference is clearly noticeable in spirited driving and widens on standing starts.