BMW M135i xDrive F40 vs Renault Megane 4 RS Trophy 300: which is truly faster?

Off the line, the Bmw M135i xDrive hits 100 km/h in 4.78 s versus 5.44 s for the Megane 4 RS Trophy 300. At this point, the Bmw M135i xDrive leads by 0.66 s and sits roughly 9 m ahead.

At 200 metres, the Bmw M135i xDrive is doing 144 km/h against 140 km/h for the Megane 4 RS Trophy 300. The gap is 0.46 s. The challenger starts to claw back ground.

At 400 metres standing start, the Bmw M135i xDrive crosses the line in 13.00 s versus 13.56 s. The 0.56 s gap represents roughly 27 m of track — two to three car lengths.

Past 400 metres, the Bmw M135i xDrive continues to build its lead. At 600 metres, it runs at 199 km/h versus 195 km/h. At 1,000 metres, the Bmw M135i xDrive finishes in 23.59 s versus 24.36 s, with a 0.77 s lead. Both vehicles have similar top speeds (250 (i.e. 155 mph — industry threshold) vs 260 km/h), preventing any comeback.

The Bmw M135i xDrive features all-wheel drive (AWD) against the Megane 4 RS Trophy 300’s FWD. At low speeds (0-30, 0-50, 0-80 km/h), AWD doubles the driven contact area: all four wheels transmit torque to the road, virtually eliminating wheelspin at launch. This traction advantage is decisive in the range where the motor delivers peak torque, before power and aerodynamics take over.

Both rivals are electronically governed, but not at the same level: the Bmw M135i xDrive is capped at 250 (i.e. 155 mph — industry threshold) km/h, the Megane 4 RS Trophy 300 at 260 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 (4.98 kg/hp vs 4.83 kg/hp) and transmission (Automatic vs Automatic).

In European road use (130 km/h max), both vehicles reach the legal speed limit in under 7.94 seconds. The 0.66 s difference in 0 to 100 km/h is mostly felt in motorway merging and overtaking.