Something based around the Targa Florio would be more believable and interesting since it'd specifically represent Sicily and also the very oldest road racing spectacle in Italy. And it's hardly like Fiat and Lancia are disappointing licensees for such a theme, either. Both manufacturers (and Isotta-Fraschini) were prominent at the event in its earliest days. They could do some wacky alt-history with a backstory about a mid-race exhibition featuring the evolution of Da Vinci's spring-gear cart, mixed in with some Archimedes (hey, Syracuse is thematically next door).