A motor vehicle has an engine compartment accommodating a powertrain and at least one strut, which is substantially parallel to an advancing longitudinal axis of the motor vehicle; the motor vehicle has a safety device configured so as to move the powertrain sideways during an impact, towards the side opposite to the one concerned by the impact; the safety device is provided with a beam having a first end, distanced from an end portion of the strut towards the outside of the engine compartment, and a second end fixed to the strut in a position which is horizontally beside the powertrain; the safety device is also provided with a restraining member fixed to the strut and having a protruding portion arranged behind a wall of the beam.