BMW X3 M40i G01 vs Porsche Macan S 95B.3: which is truly faster?

Off the line, the Macan S hits 100 km/h in 4.73 s versus 4.76 s for the Bmw X3 M40i. The 0.03 s gap is negligible: both vehicles are neck and neck.

At 200 metres, the Macan S is doing 142 km/h against 142 km/h for the Bmw X3 M40i. The gap is 0.05 s. The gap remains stable from the start.

At 400 metres standing start, the Macan S crosses the line in 12.97 s versus 13.01 s. The 0.04 s gap represents roughly 2 m of track — barely a car length.

Past 400 metres, the Macan S continues to build its lead. At 600 metres, it runs at 197 km/h versus 197 km/h. At 1,000 metres, the Macan S finishes in 23.67 s versus 23.71 s, with a 0.05 s lead. Both vehicles have similar top speeds (250 (i.e. 155 mph — industry threshold) vs 259 km/h), preventing any comeback.

On paper, the Bmw X3 M40i combines 354 hp, 500 Nm and 1,810 kg — a clear theoretical edge over the Macan S. Yet the Macan S launches quicker. At standstill, both motors deliver peak torque from 0 rpm: the decisive factor is no longer raw power, but available grip. If the Macan S has a better traction coefficient (tyres, weight distribution, traction control calibration), it puts down more force despite inferior specs — exactly what the simulation reflects, calibrated on manufacturer 0-100 km/h times.

Both rivals are electronically governed, but not at the same level: the Bmw X3 M40i is capped at 250 (i.e. 155 mph — industry threshold) km/h, the Macan S at 259 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 (5.11 kg/hp vs 5.68 kg/hp) and transmission (Automatic vs Automatic).

In European road use (130 km/h max), both vehicles reach the legal speed limit in under 7.24 seconds. The 0.03 s difference in 0 to 100 km/h is mostly felt in motorway merging and overtaking.