Berlina, Berlinetta and Coupé
Another mistery is the difference between Berlinetta and Coupé, apparently two names for a 2-doors/2-seats closed car.
What I have found is that the difference should be found again in the structure of the body, because until the 50s a Berlinetta was a short and sporty Berlina, with a 2-box fastback body, and a Coupé was a 3-box car.
In fact the Coupé is the evolution of the Coupé-Spider (see previous post) and the Berlinetta is the heir of the Coupé-Royal (which is a short Guida Interna, the old Berlina).