Process and plant for producing tyres for vehicle wheels

A plant and a process for producing tyres for vehicle wheels. The process includes the steps of: a) building green tyres on respective toroidal supports in at least one building line of a tyre production plant; b) transferring a first green tyre and the relevant toroidal support to a moulding and vulcanization unit of at least a first vulcunization line of a vulcanization station of the production plant, the first vulcanization line being provided with a first device for transferring the toroidal support; c) transferring a second green tyre and the relevant toroidal support to a moulding and vulcanization unit of at least a second vulcanization line of the vulcanization station of the production plant, the second vulcanization line being different from the first vulcanization line and being provided with a second transfer device different from the first transfer device; d) moulding and vulcanizing the first green tyre in the moulding and vulcanization unit of the first vulcanization line for a first time interval and the second green tyre in the moulding and vulcanization unit of the second vulcanization line for a second time intercal different from the first time interval, wherein at least one between steps b) and c), is preceded by a step j) of transporting at least one of the green tyres and the relevant toroidal support into a holding unit operatively interposed between the first vulcanization line and the second vulcanization line.