The quick grow of the Italian average pro-capite income, the widespread diffusion of cars in the Country and the consequent growing tourist traffic, were all factors helping the strengthening of Tirrenia. Between '52 and '63 new units entered service, some of which became leaders for tonnage, speed and passenger capacity, but also for the introduction of a new range of accommodations, from the cabins of the two classes to the comfortable tilting armchairs.