Fiat 666

The Fiat 666 was a heavy truck built by the Italian maker Fiat Veicoli Industriali from 1940 as one of the Unified trucks. Since 1937 the War Department had required all manufacturers of civilian trucks to follow standard features for weight, number of axles, speed and capacity, so that vehicles could be requisitioned easily by the armed forces. The 666, like the medium Fiat 626, was among the first trucks from Turin with forward control and the engine placed entirely inside the cab. Its chassis had two axles with front-wheel steering and twin rear-wheel drive, and it used a Fiat 366 six-cylinder diesel engine of 9,365 cc giving 105 hp at 2,000 rpm, with a four-speed gearbox and reduction gearing. Civil and military diesel versions were produced from 1940 to 1945, and the Italian Royal Army and Royal Air Force took large numbers in bodies such as bus, tanker and fire engine. The civilian truck, also offered with a bus chassis, was built after the war as the Fiat 666N7, for a total production of 8,000.