 In the rarefied market segment that it occupied, the car tended to find itself overshadowed by the Maserati Quattroporte, itself never a mass seller.Until Maserati in effect retreated from the market in response the economic shock that saw massive oil price increases, the Fidia was comfortably outsold by its Modenese competitor.In 1971 Iso produced just 15 Fidias, which rose to 21 in 1972 and slid to 20 in 1973.