This mid-1960s Alfa Romeo engine was used in midget competition in the Colorado area for several years. It is a double-overhead cam (DOHC) design and measures 1600cc (98 cubic inches). This engine is fitted with two Weber side-draft carburetors, along with an oil pan out of a 105 GTV.
The Alfa Romeo Twin Cam engine was introduced in the 1290 cc Giulietta of 1954. The features of the Giulietta engine included:
This made the Alfa Romeo Twin Cam engine an advanced design for a production car of the mid-1950s. These design features, with minor variations, would form the basis of all future versions of the engine. The capacity was increased to 1570 cc with the introduction of the Giulia in 1962. Racing versions of the Giulia engine include the twin plug engine used in the GTA, which featured a cylinder head with two spark plugs per cylinder.