Isotta - Fraschini 18 cilynders

[CharlesBronson]

Making the IS 750, 18 cilinders, 3 row in "W", 72 valve, 950 hp, year 1935.


View: https://www.youtube.com/watch?v=292LznS1YIk


Image

Total displacement was 45,5 liters. it was also used for torpedo boats.

 

[AMCKen]

Asso 1000 also. Italian page...
Isotta Fraschini Asso 1000 - Wikipedia

 

[Shinpachi]

 

[CharlesBronson]

Interesting, the "Ace" 1000 seems to be also the engine sold to the UK for emplacement in some torpedo boat at 1938-39.
With 57 liters was a real monster but not in the power output departament.

 

[AMCKen]

1000hp out of 3,494 cubic inches would be a low stress engine. But, also over 3,000 ftlbs of torque.

 

[CharlesBronson]

The low grade of italian fuel probably has something to do with it, 84 to 86 octanes. They never used the 100 octane fuel except in some races like the MC72.

By the way the Asso 750 compression ratio was 5,6 to 1.