I have found two answers.
1. horizontal speed of about 55mph, stoop speed of up to 270 mph
www.extremescience.com/fastinworld.htm
2. stoop speed of up to 242mph
wolf21m.blogspot.com/2008/01/peregrine-falcon-speed.html
Peregrine Falcon
The peregrine falcon can dive at more than 200 miles per hour
200 miles per hour
The fastest recorded speed of a Peregrine falcon is 389 kilometres per hour, which is equal to 242 miles per hour. This is not its cruising speed, but its diving speed, which is when it makes maximum use of its long wingspan, streamlined shape and powerful chest muscles.
Your peregrine thoughts have illumined my mind.The Peregrine Falcon (Falco peregrinus) is also known as the Duck Hawk, in America.The peregrine may reach a speed of 200 miles per hour, in a dive.
When diving to capture prey, the peregrine falcon can exceed speeds of 200 miles per hour (322 kilometres per hour).
The highest velocity of a bird is approximately 200 miles per hour. This speed is reached by the peregrine falcon when it dives for hunting purposes.
200 miles per hour
The Peregrine falcon is renowned for its incredible speed, particularly during its hunting stoop (high-speed dive), where it can reach speeds of over 240 miles per hour (386 km/h). When flying horizontally, it can still achieve speeds of around 40 to 60 miles per hour (64 to 97 km/h). Therefore, in a minute, a Peregrine falcon can cover a significant distance, depending on its flight mode.
The fastest bird is the peregrine falcon, which can reach speeds of over 240 miles per hour (386 kilometers per hour) during its characteristic hunting stoop (high-speed dive). In level flight, the common swift is among the fastest, reaching speeds of around 69 miles per hour (111 kilometers per hour). The peregrine falcon's speed makes it not only the fastest bird but also the fastest animal on the planet.
The top speed man has run is about 25 miles per hour; the fastest dog, the greyhound, reaches a speed of 40 miles per hour; racehorses have been timed at 50 miles per hour; and antelopes can go close to 60 miles per hour. But none of them can come close to the world's fastest runner, the cheetah. No animal on earth can outrun the cheetah's 70-mile per hour speed.
It is the peregrine falcon, reaching 322 kilometers per hour.