How fast does a Peregrine Falcon fly?

From "The Guinness World Records" (of June 2011)

The fastest dive that has been recorded was during one series of German experiments, when a peregrine falcon reached a velocity of 270 km/h (168 mph) at a 30° angle of stoop, rising to a maximum of 350 km/h (217 mph) at an angle of 45°.

Unofficially they have been recorded at significantly higher speeds.