The Iso Fidia, initially Iso Rivolta S4, is a four-door sedan which was produced by the Italian automobile maker Iso Automoveicoli S.p.A. from 1967 to 1975. The Fidia, first presented at the Frankfurt Motor Show in September 1967, was the only four-door model from Iso. Production only got underway some time after the initial presentation of the car, and its European press launch which took place in Athens, came more than a year later, in February 1969. At the time of the press launch 15 cars had already been built, but it was only in February 1969 that the car swapped its "S4" name for the more euphonious "Fidia". The car was marketed as a unique combination of comfort and sporting performance, and the slogan that appeared in sales material was "Le quattro poltrone piu veloci del mondo".