As values increase, things that were once overlooked as not important suddenly gain importance. This will become increasingly true of engine numbers in Alfa’s 750 and 101 series cars as they grow in popularity and value in the collector car world. Engines, much like VIN numbers have a 4 or 5 digit Tipo number, followed by a serial number, which in some cases starts with a number indicating the model it was fitted to. The engine number ranges I will quote below come from Fusi’s book, which is known to have errors and omissions, if you have a number that doesn’t fit with what is presented, let me know at email@example.com!
A Sprint 10105 build plate indicating Tipo, Autotelaio and Motore numbers. The font of the stamp is correct. Note that this plate is held on by screws. Also note that Autotelaio and Motore numbers don’t match. The serial number of the motor 010669 is included.