It does not matter if it is a TR-20 or the TR-21, with a 225 optimax, neither boat will run 80mph and still be increasing speed. Absolutely cannot happen. I have been aroung the boat business and been in a lot of bass boats, and believe me, these boats will not run 80mph. I have a good friend with the TR-21 with 225 optimax that can drive the !!!!!! out of a bass boat and he has only seen 74.8 GPS with his boat. I currently own a 2007 bullet 21XD with the 300XS engine on a 14" rapidjack jackplate, set a 1.5 inches above the pad. I have seen 89.9mph once, folks let me tell ya, if you have never been in a bass boat at 90mph.....Well I just can't seem to put it into words.