4WD chassis? Check. 5.9 6-cylinder diesel? Check. Made by a company that was the first to mass produce 4-wheel drive tractors? You bet your boots! The D100 was introduced by Versatile in 1966. It has 100 HP and can be sold for around $69,000. A 42 degree turn in both directions and a center pivot of 30 degrees of oscillation, makes this all-wheel tractor able to handle some of the roughest terrain. Versatile was bought by the Ford Motor Co. in 1987.