The Massey Ferguson 1700E Series Tractors Feature 3 Horsepower Sizes: 1726E [24.0 Engine HP], 1734E [34.0 Engine HP] and 1739E [38.5 Engine HP]....but they use the same chassis, same sized tires and no Physical Size Differences. These Photos show from left to Right the 1739E, 1734E & 1726E so you can see they are they same size...the difference is under the hood. Engine Horsepower Difference.