On the Internet since November 1995 and still here. Type numbers used by Alfa Romeo for identification. The number is located in the engine bay.
Engine number is stamped on the crankcase close to the flywheel cover on exhaust side.
The engine head has an indetification mark in the front. Go here for more details . I have spent lots of time doing this chart, so please ask me first before you copy and use it. Wille R . Giulietta 2,0 116.