This line of 2.5 engines were produced in the '50s by the now dismantled
Barbini factory and were of the following specifications:
- B40 Testa Blu (blue head) Plain bearing Diesel
- B40 Testa Oro (gold head) Twin bearing Glow, tuned for speed(!!)
- B40 Testa Rossa (red head) Twin needle bearing team race diesel
- B40 Testa Nera (black head) Standard glow
The Red Head in the picture (note the needle bearing cage) was raced in
1958 by the Cantelli-Amerio team over the Italian championship with
excellent results. History does not say (or does not like to remember...)
how excellent those results were, but I understand they did not win the
championship!
(Information given by Mario A. Ferrero)