Allis-Chalmers was by not means the first company to offer a diesel tractor. But AC diesel-powered tractors set themselves apart of the competition in the 1960s by offering machines that delivered hard working horsepower over a wider torque range. To boost performance even further, Allis engineers equipped their Model D-19 (introduced in 1916) with a turbocharger, marking it as the first such tractor to feature charged air compression on the market.
The Farmall was not the first tractor to feature the now famous tri-cycle design. Nor was it the first attempt at an all-purpose tractor; a machine as accustomed to cultivating row crops as it was plowing or powering a thresher. But Farmall was the tractor that put both concepts to practical application and commercial success. And for its impact on tractor engineering – let alone the improvement in quality of life for farmers – the Farmall stands atop the pile of the world’s greatest tractors.