An improved prony brake dynamometer capable of measuring the power of a prime mover's rotating shaft connected to a cylinder brake drum rotating around a newly designed dual quad power stator (DQPS), with hydraulic pressure equalizer plate (HPEP), controlled by an electronic load control system with inline cooling system (ELCS), cooled by a 270-degree water distribution manifold (WDM). The improvements of the DQPS and HPEP result in maximizing the pressure applied by the stator over the entire surface area of the rotor drum, thereby maximizing the coefficient of friction at the kinetic point of energy and increasing load capacity over previous models. The addition of the ELCS increases the number of potential settings of hydraulic pressure, resulting in thousands of power settings, as opposed to previous models using manual load control valves. The WDM cools the dynamometer load absorption unit more efficiently than previous models.