Abstract: A hinge for a front bonnet of a motor vehicle; the hinge is provided with a mobile bracket, which is rigidly connected to the front bonnet, and a fixed bracket, which presents an elongated shape, is hinged to the mobile bracket at a rotation axis of the hinge, and is rigidly connected to a frame of the motor vehicle by means of two fastening screws arranged through two through holes; the rotation axis is arranged at a first end of the fixed bracket, a first through hole presents an elongated shape and is arranged at a second end of the fixed bracket, and a second through hole presents a circular shape and is arranged in an intermediate position between the two ends of the fixed bracket; the first hole is engaged by a first fastening screw which is tightened to the frame with calibrated and limited tightening torque so as to allow a rotation of the fixed bracket about a second fastening screw in case of a collision against the front bonnet at the hinge.