The Performance Charts below are not based on factory data, rather on data complied by Mooney Pilots/Owners over a decade and thousands of hours real world experience.  You might also note that same model Mooney's cruise speed varies from aircraft to aircraft.  This is because Mooney aircraft are hand built and slight airframe/engine differences show up due to the extreemly low drag of the airframe.  We have used typical data airspeeds in the charts.