Flight Crew Private; Flight Crew Instrument
Flight Crew Last 90 Days 111; Flight Crew Total 345; Flight Crew Type 333
Time Pressure
Conflict NMAC
Flight Crew Took Evasive Action
The Centurion was not on the practice frequency and was not changing course or altitude and came from our 8 O'clock position passing directly below us at a faster speed than us; we initiated a climb and a bank left to put as much space as possible between our two aircraft.
PA-28 pilot reported an NMAC event during training flight with a Cessna P210 Centurion who was not on correct radio frequency.