Kiota John, I won't pretend to be an expert on the HP rating. However, I believe Leonard Shaefer of Shaefer tractor is one of the most knowledgeable guys on several gray market tractors especially the Iseki. According to him, (and no, I didn't buy my tractor from him) they are rated in metric HP which equates to about 20% less than sae HP. That he says is why the equivalent US versions of many Japanese tractors have a different # series. Of course weather it is 16 or 19 the tractor is the same, it is a low HP tractor and that is why I want to be careful, not to buy any implements that will overtax the tractor. I know that a larger tractor, with 4WD and a loader would be great to have. However, with a 1/4 acre garden, about a 1 acre lawn and another 5 acres of woods, I don't have a NEED for the bigger tractor.