Pro Line® Series 7-Qt Bowl Lift Stand Mixer with 1.3 HP Motor. Motor horsepower for Kitchenaid's mixer motors was measured using a dynamometer, a machine laboratories routinely use to measure the mechanical power of motors. Their 1.3 horsepower (HP) motor reference reflects the horsepower rating of the motor itself and not the mixer’s horsepower output to the mixer bowl. This robust motor, the backbone of their new mixer, delivers .44 HP to the bowl enabling your mixer to deliver consistent power to small and large loads with less heat build-up; resulting in years of dependable mixing. Combined with and guided by their new advanced motor control board, this is their longest-lasting and most efficient motor yet. Simply put, our new, highly efficient, special-purpose motor delivers the power you need when you need it.