Abstract: A motor-vehicle, particularly an electrically-powered car of small size, has a supporting structure in the form of a reticular framework (2) of light alloy. The framework (2) includes two side structures (3) each formed by extruded profile elements (4) which are welded to joining knot elements (5) which have been obtained by casting. The side structures (3) are connected to each other by cross members (6, 7, 8, 9) which also are formed by extruded profile elements having their ends connected to the side structures (3) by mechanical coupling means, such as screws.

Abstract: A system having a pair of axle shafts; an input shaft for transmitting torque; and a differential for transmitting motion from the input shaft to the axle shafts and in turn presenting a planet carrier angularly integral with the input shaft, and a pair of sun gears; the system also presenting a first clutch interposed between each axle shaft and a respective sun gear, a second clutch interposed between each axle shaft and the planet carrier; and a device for controlling the clutches and continuously varying distribution of the torque between the axle shafts.