There are new rumours about Volkswagen or Audi could join F1 in future. Of course this rumours are kicking around 2-3 times a year.
But I know that there were some serious F1 projects from Audi:
- 1985 a magazine published a 5 cylinder turbo engine from Audi.
- 1992/1993 Audi was in strong negotations with McLaren. Heinz Prüller wrote that the other F1 engine makers made notice of that after Audi was ordering some engine parts by supplier for engine builders.
Were there more serious F1 projects in the past?