 Diesels steadily gained in acceptance with private buyers in the 1970s and into the 1990s.Having originally been mainly marketed to commercial users such as taxi drivers, European diesel sales increased steadily and reached 17.3 per cent of the overall European market by 1992.Many Audi enthusiasts claim that the Audi 100 TDI was the first turbo charged direct injection diesel sold in 1989, but actually it isn't true, as the Fiat Croma TD-i.d.