Alfieri Maserati and co-driver and brother Ernesto Maserati in Isotta-Fraschini "Special" at III Circuito di Mugello on 18 June 1922. They won the race which was  389.39 km (64.90 km x 6 laps).<a rel="nofollow" class="external autonumber" href="http://www.dlg.speedfreaks.org/archive/gen/1922.html#cdm">[1]</a> The car had a  four-cylinder single-overhead cam engine based on half of the block from a Hispano-Suiza aircraft V8 engine <a rel="nofollow" class="external autonumber" href="http://kansasracinghistory.com/Adams/firsthisso.htm">[2]</a> (– From the book The Roaring Twenties, by Cyril Posthumous, published in England in 1980)
Unknown photographer
<a rel="nofollow" class="external autonumber" href="http://kansasracinghistory.com/Adams/firsthisso.jpg">[3]</a>