I was idily pondering whether a Fiat 20v Turbo engine would fit directly into the 166 2.0 twinny's place. I'm assuming they are the same engine in principle with the exception of toughened valves and lower running pressure etc. Would it give as much as the 3.2 fitted in the newer models, I doubt fuel economy would be any better. That 3.2 was unbelievable in a 156 Gta I had. Has anyone come across someone that has done this and is it possible without swapping ECU's and wiring looms etc?