Of course, there are exceptions to every rule.
My Nauticat 33 motorsailer displaces 9 tons. With her Lehman 90 hp, iron heart beating beneath the pilothouse sole, it''s comforting to know we can exceed hull speed when needed . . . or desired. A 22" three blade prop on a 40 mm shaft is assurance that the running gear has been designed to accommodate the torque of that engine.