Continental O-470-R is a carbureted O-470 variant approved in the Cessna 182E through 182P model groups and retained as an alternative to O-470-L and O-470-S. Continental’s 470-series data sheet rates the exact O-470-R at 172 kW (230 hp) at 2,600 rpm with 7.722 L displacement; SIL00-7C lists it for factory-rebuilt engines, so active reflects current support and rebuilt availability without asserting new production.