The following is a presentation by A. Sollo at EWADE (European Workshop on Aircraft Design and Education) May 2011. I'm not sure where I came across this, but it has a bit of history on the company, and goes through the development of the P180.
Piaggio History and P180 Development
Re: Piaggio History and P180 Development
Nice history layout. I see the Avanti III was the early established name for the EVO. I noticed on the last page that the exhaust heat signatures are much different from the II to the EVO.