ala spessa 915096??

[gtv2000]

Quote:

Originally Posted by iicarJohn Although the promotional period reference shown earlier indicated that the 256SS engine was designed for 8.0 compression but actually raced at Tobruk with a more conservative 7.8, the stated change in horsepower ratings cannot be supported by such a small change in compression ratio alone so I have to believe that the cam timing ("valve timing") was also changed as part of the package.

[dretceterini]

Thanks John and Patrick for all your input.

As to 915001, I still think some of the 2nd series 6c2300B MMs (how Fusi refers to them) were never actually completed as 2300B MMs, and some were renumbered and actually were built as 2500s in late 1937 or early 1938, and are really T256s or pre-war SS cars.

Like John (although I'm 10 years older), I wasn't there to know...and the Alfa records I have seen (back 10-15 years ago, when Elvira was still there), didn't seem to prove anything.

I could find anything other than cursory information on the Tipo 412s (which I am obsessed with), nor the Tipo 256s.

[iicarJohn]

Unless there was something I missed, I believe we were speaking of Cortese's car, chassis number 815001 (number beginning "eight" rather than "nine")? So far as I know, nothing is known of 915001 other than the presumption that it was a 6C2500.

The slightly lower compression ratio of the Tobruk-Tripoli engines might indeed account for approximately 5HP/CV loss, particularly inasmuch as the likely "peak" point probably dropped very slightly in revs although that is less certain. What is quite likely is that the fuel would have had a different formulation than that which might have been thought "ideal" and there may have been a slightly different energy quotient in that fuel as well. We can only guess at the volatility and overall octane ratings. There are many unknowns.

Note also that, simply because an article proclaims these numbers for a car that is being promoted at the time, that is no guarantee of any kind that all the cars were prepared similarly. If Alfa Romeo sought to hedge their bets, they might have had a car or two run with other specifications that were simply not reported. And what Alfa Romeo was doing and promoting will not necessarily include all (or any?) of the "privateer" entries.

[gtv2000]

Quote:

Originally Posted by iicarJohn Unless there was something I missed, I believe we were speaking of Cortese's car, chassis number 815001 (number beginning "eight" rather than "nine")? So far as I know, nothing is known of 915001 other than the presumption that it was a 6C2500.