Early farming machinery relied on massive steam engines that were dangerous, slow, and labor-intensive to operate. The transition to internal combustion engines fueled by gasoline and diesel revolutionized farm power in the early twentieth century. Today, diesel engines remain the industry standard for tractors due to their high torque output, fuel efficiency, and overall durability. https://www.chiguu.com/articles/used-vs-new-tractor-which-is-the-smarter-investment