sentences:  World War II was coming and car development was stopped, but a few hundred 6C 2500s were built from 1940 to 1945.Postwar, the first new Alfa model was the 1946 6C 2500 "Freccia d'Oro" (Golden Arrow), of which 680 were built until late 1951, with bodies by Alfa.The 2500 had an enlarged engine compared to the predecessor model; this Vittorio Jano designed dual overhead cam engine was available with either one or three Weber carburetors.