Watch And Hear The 1,729 Cubic Inch OHC Hemi Four Cylinder ‘Beast of Turin’ 1911 Fiat S-76 Bellow And Spit Flames For The First Time In A Century

(first posted 13/3/2014)    Stefan Marjoram is creating a documentary of the restoration of the legendary 1911 Fiat S76, which has the distinction of arguably having the largest automobile engine in history: 1,729 cubic inches, or 28.4 liters, from four cylinders, with an OHC four valve per cylinder hemi head, no less. It makes a mighty 2,000 lb.ft of torque and 300 hp @1800 rpm. Good enough for 137 mph.

Fiat S76 color

Built in 1911 to take the world’s fastest car title from the 21 liter “Blitzen Benz”, the Fiat S76 had a four cylinder engine with a bore of 7 1/2″ and stroke of 9 27/32″, for a total displacement of 1,729 cubic inches. Thanks to an advanced cylinder head with overhead cam and four valves per cylinder, output was 300 hp at a thunderous 1800 rpm, enough to do the trick: 187 kmh (116 mph), a certified run at Saltburn, UK. A later run on the sandy flats of Ostende yielded 137 mph, but did not make the record books for lack of a return run. Contrary to popular myth, it was not an “airship engine”, although a later Fiat airship engine did use the same bore and stroke.

Here is is making some spectacular rounds at the Goodwood Festival of Speed 2019.


The Beast of Turin trailer from stefan marjoram on Vimeo.