In the mid-1980s, Osella was the beneficiary of factory Alfa Romeo engines, both in naturally-aspirated (1983–84) and turbo (1984–88) forms. On one hand, the Alfa engine program helped the team to survive the increasingly professional turbo era; on the other hand, the heavy, unreliable and thirsty machines contributed to the team's lack of competitiveness. At least at first, Alfa offered some technical input to the team; the 1984 Osella FA1F was based on the 1983 works Alfa Romeo 183T, which had been loaned to the team for "design assistance" purposes. All the following Osella models up to the FA1L in had their origins in the initial Alfa design.