The Fidia was, like other Iso cars, powered by a Chevrolet V8 engine, and was quite quick off the line (0-60 in around 7 seconds). The body design was the work of Giorgetto Giugiaro (then at Ghia). The interior featured polished wood and hand-stitched leather. High development costs drove the purchase price higher than that of a Rolls-Royce. The Fidia's main competitors were other luxurious and sporty sedans like the Maserati Quattroporte.

The second Fidia made (and the first with right hand drive) was purchased by English rockstar John Lennon.