In the vanilla version of ETS2, your truck is electronically limited to 90 km/h (approximately 56 mph), though you can disable the limiter in the gameplay options to reach roughly 150 km/h before the stock engine runs out of breath.
At speeds exceeding 200 km/h, the default game physics often cause trucks to lose stability or flip instantly. You need a Physics Mod euro truck simulator 2 speed mod 400 km h patched
While there is no official "patched" mod specifically capped at exactly , you can achieve extreme speeds in Euro Truck Simulator 2 by combining official gameplay settings with community-created modifications. 1. Disable the Internal Speed Limiter Euro Truck Simulator 2 Speed Mod 400 km/h