Further to my last the speed is 60kts. If your practice is to stand the thrust levers up, stabilise engines,release brakes, then push TOGA switches, often in strong headwinds, more than 60kts IAS will be indicated.You will not get N1 annunciation as there not enough time for the A/T system to set the N1 before 80kts. ie THRUSTHOLD. So manual setting is required.More common on bigger aircraft.