The invention relates to a vehicle drive system, comprising an electromechanical converter, in particular an electric variable transmission. The converter is provided with a primary shaft having a rotor mounted thereon, a secondary shaft having an interrotor mounted thereon and a stator, fixedly mounted to a housing of the electromechanical converter. Viewed from the primary shaft in radial direction, the rotor, the interrotor and the stator are arranged concentrically relative to each other. Further, the primary shaft is arranged for being driven by an output shaft of an engine and the secondary shaft is arranged for driving an input shaft of a transmission unit.