A rear vehicle assembly includes a body structure defining an opening having a first side edge and a second side edge and including a tailgate that is movable relative to the structure between at least one open position, in which the opening of the structure is accessible, and a closed position, in which the tailgate closes the opening of the structure, wherein the tailgate comprises at least a first side edge and a second side edge. The assembly includes an opening and closing device fixing the tailgate to the structure. The opening and closing device includes at least a first jack and a second jack, wherein the first and second jacks are each fixed between the structure and the first side edge.