The Fiat 65-66S is a utility tractor produced from 1992 to 1996 as part of the 66S Series. It features an Iveco 3.6L 4-cylinder liquid-cooled diesel engine delivering 64.3 hp (47.9 kW). The tractor offers multiple transmission options including 12-speed gear, 12-speed sync shuttle, and 20-speed creeper. It is available in two- or four-wheel drive configurations with power steering, wet disc brakes, and a four-post ROPS with an optional cab. The rear lift capacity is 7859 lbs (3564 kg) and PTO options include 540, 540/750, and 540/1000 rpm. Dimensions vary slightly between 2WD and 4WD models, with wheelbases around 90 inches and weights ranging from 5159 to 5644 lbs. Standard tires differ for 2WD and 4WD versions. Electrical system uses a 12-volt negative ground battery.