 These models were essentially Fiat 1800s fitted with the 1500 engine, and therefore referred to as "1500" in Fiat nomenclature.The Taxi version debuted in 1962 and had the engine detuned to .The 1500 L (for "Lunga" - Italian for "long") originally had the same engine as the regular 1500, and in 1964 was upgraded to along with the Fiat 1500 C.

The Seat 1500 was a car unrelated to the Fiat 1500.