Wikimedia Commons. The cheetah, the world's fastest land animal, can race up to 75 mph for short bursts. The greyhound is the fastest canid, and the second-fastest land animal, with a peak speed of about 43 mph. Cool facts! Now let's watch them run in super slow motion. Note that while cheetahs and greyhounds are very, very different animals, they've independently evolved to have very similar running styles.