Upton Tractors
Upton Engineering in New South Wales, Australia built the world's largest two-wheel drive tractors in in the 1970s. Early Upton tractors in the 1960s used military-surplus tank components. Later Upton tractors utilized truck construction equipment components, leading up to the Upton HT-14/350; a 51,000 pound two-wheel drive tractor fitted with earthmover tires. Upton stopped building tractors by 1980, although the company continues to build irrigation equipment.
Upton Engineering - official site
Upton Tractors
| Upton 180 | Power: 180 hp | Date of manufacture : 0000 - 0000 |
| Upton 225 | Power: 225 hp | Date of manufacture : 1969 - 1979 |
| Upton HT-14/350 | Power: 350 hp | Date of manufacture : 0000 - 0000 |
| Upton Heavy Harry | Power: 0 | Date of manufacture : 0000 - 0000 |
| Upton MT-855 | Power: 0 | Date of manufacture : 0000 - 0000 |