High Quality Content by WIKIPEDIA articles! The Fiat AS.6 was an unusual Italian 24-cylinder, liquid-cooled V engine designed and built in the late-1920s by Fiat especially for the Schneider Trophy air races, but development and running problems meant that it was never able to compete. Although the engine suffered from technical problems, it was later used to set a speed record for piston-powered seaplanes that still stands today.