A road vehicle with hybrid drive comprising: at least one pair of drive wheels; an internal combustion heat engine; a dual-clutch transmission comprising: a first primary shaft and a second primary shaft; a first clutch interposed between the internal combustion heat engine and the first primary shaft; a second clutch interposed between the internal combustion heat engine and the second primary shaft; at least one secondary shaft permanently driving the drive wheels; a plurality of first gearings, each defining a respective gear and comprising a primary gear wheel, which is mounted on a primary shaft (16, 17), and a secondary gear wheel, which is mounted on the secondary shaft and permanently meshes with the primary gear wheel; and a plurality of synchronizers (27, 28, 29), each mounted on a primary shaft (16, 17) and designed to fit at least one corresponding primary gear wheel to the primary shaft (16, 17), or mounted on the secondary shaft and designed to fit at least one corresponding secondary gear wheel to the secondary shaft; and a reversible electric machine having a shaft, which can be connected to at least one primary shaft (16, 17) of the dual-clutch transmission; wherein the dual-clutch transmission further comprises: a third clutch, which is interposed between the shaft of the electric machine and the first primary shaft so as to connect/disconnect the shaft of the electric machine to/from the first primary shaft; and a fourth clutch, which is interposed between the shaft of the electric machine and the second primary shaft so as to connect/disconnect the shaft of the electric machine to/from the second primary shaft; wherein all clutches (18, 19, 32, 33) are coaxial to one another; and wherein the dual-clutch transmission comprises an intermediate shaft, which rotates together with the shaft of the electric machine, is directly connected to the third clutch and to the fourth clutch and is coaxial to the primary shafts (16, 17); the road vehicle is characterized in that: the first clutch is coaxial and coupled to the third clutch so as to form one single unit with the third clutch; and the second clutch is coaxial and coupled to the fourth clutch so as to form one single unit with the fourth clutch. at least one pair of drive wheels; an internal combustion heat engine; a dual-clutch transmission comprising: a first primary shaft and a second primary shaft; a first clutch interposed between the internal combustion heat engine and the first primary shaft; a second clutch interposed between the internal combustion heat engine and the second primary shaft; at least one secondary shaft permanently driving the drive wheels; a plurality of first gearings, each defining a respective gear and comprising a primary gear wheel, which is mounted on a primary shaft (16, 17), and a secondary gear wheel, which is mounted on the secondary shaft and permanently meshes with the primary gear wheel; and a plurality of synchronizers (27, 28, 29), each mounted on a primary shaft (16, 17) and designed to fit at least one corresponding primary gear wheel to the primary shaft (16, 17), or mounted on the secondary shaft and designed to fit at least one corresponding secondary gear wheel to the secondary shaft; and a reversible electric machine having a shaft, which can be connected to at least one primary shaft (16, 17) of the dual-clutch transmission; wherein the dual-clutch transmission further comprises: a third clutch, which is interposed between the shaft of the electric machine and the first primary shaft so as to connect/disconnect the shaft of the electric machine to/from the first primary shaft; and a fourth clutch, which is interposed between the shaft of the electric machine and the second primary shaft so as to connect/disconnect the shaft of the electric machine to/from the second primary shaft; wherein all clutches (18, 19, 32, 33) are coaxial to one another; and wherein the dual-clutch transmission comprises an intermediate shaft, which rotates together with the shaft of the electric machine, is directly connected to the third clutch and to the fourth clutch and is coaxial to the primary shafts (16, 17); the road vehicle is characterized in that: the first clutch is coaxial and coupled to the third clutch so as to form one single unit with the third clutch; and the second clutch is coaxial and coupled to the fourth clutch so as to form one single unit with the fourth clutch. the first clutch is coaxial and coupled to the third clutch so as to form one single unit with the third clutch; and the second clutch is coaxial and coupled to the fourth clutch so as to form one single unit with the fourth clutch.