In 1923, Vittorio Jano was lured from Fiat, partly due to the persuasion of a young Alfa racing driver named Enzo Ferrari, to replace Merosi as chief designer at Alfa Romeo. The first Alfa Romeo under Jano was the P2 Grand Prix car, which won Alfa Romeo the inaugural world championship for Grand Prix cars in 1925. For road cars, Jano developed a series of small-to-medium-displacement 4-, 6-, and 8-cylinder inline engines based on the P2 unit that established the architecture of the company's engines, with light alloy construction, hemispherical combustion chambers, centrally located plugs, two rows of overhead valves per cylinder bank and dual overhead cams. Jano's designs proved both reliable and powerful.
in 1923 vittorio jano was lured from fiat partly due to the persuasion of a young alfa racing driver named enzo ferrari to replace merosi as chief designer at alfa romeo the first alfa romeo under jano was the p2 grand prix car which won alfa romeo the inaugural world championship for grand prix cars in 1925 for road cars jano developed a series of small-to-medium-displacement 4- 6- and 8-cylinder inline engines based on the p2 unit that established the architecture of the company's engines with light alloy construction hemispherical combustion chambers centrally located plugs two rows of overhead valves per cylinder bank and dual overhead cams jano's designs proved both reliable and powerful