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Big Bud Tractor. Big Bud Tractor. 16-V 747 Big Bud The World's Largest Farm Tractor. In 1977 the Big Bud 747 tractor was built in Havre, Montana. The tractor was built by Ron Harmon and the crew of the Northern Manufacturing Company. The tractor was built to produce 760 horsepower using a 16-cylinder Detroit Diesel engine. The tractor measures 27 feet long, 20 feet wide, and 14 feet tall.
Apply Now. The Tractomas TR 10 x 10 D100 by the Nicolas Industrie SAS, France, is the worldâs largest semi-truck with a total weight of 71 tonnes and was launched in France on 28 October 2005. The truck is 12,620 mm long, 3,480 mm wide and 4,515 mm high.