Abstract: An assembly for starting an engine comprises a starter to supply a required starting torque to the engine to start the engine in a starting phase, the starter being subject to dispersions varying the value of the torque supplied, an electronic starting device linked to the starter to supply an electrical current to the starter to electrically power it in the starting phase. The starter comprises a device for characterizing the dispersions of the starter, the electronic starting device is configured to cooperate with the device for characterizing the dispersions of the starter so as to determine the dispersions of the starter, and the electronic starting device is configured to adjust the electrical current supplied to the starter as a function of the determined dispersions to compensate the dispersions of the starter, so that the starter supplies the required starting torque to the engine.