A cheetah is the fastest land animal ever measured -- 112 km/h in full sprint, from 0 to 100 km/h in three seconds. A greyhound tops out at 72 km/h. On paper the cheetah wins by a country mile. But the cheetah overheats after 30 seconds, while a greyhound can hold 60 km/h for eight minutes. The race isn't about top speed -- it's about how long you can hold it.
Acinonyx jubatus
Canis lupus familiaris
Every animal is optimized for the distance its prey strategy requires. Cheetahs evolved to ambush gazelles in one short explosive rush. Greyhounds were bred from sighthound lineages that coursed hares across open country for kilometers.
| Category | Cheetah | Greyhound | Advantage |
|---|---|---|---|
| Top speed | 112 km/h | 72 km/h | Cheetah (+55%) |
| Acceleration (0-100) | 3 seconds | Cannot reach 100 | Cheetah |
| Sprint at max speed | 20 -- 30 seconds | 8+ minutes at cruise | Greyhound |
| Distance at speed | 500 m | 5,000 m+ | Greyhound |
| 100 m race | 5.8 s | 7.2 s | Cheetah |
| 400 m race | ~12 s | ~22 s | Cheetah |
| 1 km race | Must stop | ~60 s | Greyhound |
| 5 km race | Impossible | ~5 min | Greyhound |
| Heat tolerance | Overheats at 40.5°C | Pants effectively | Greyhound |
| Turning agility | Exceptional | Good | Cheetah |
A cheetah's entire body is a trade-off for explosive speed. Enlarged nasal passages for oxygen intake. Semi-retractable claws for traction. Long flexible spine that acts as a spring at full gallop. Large heart and lungs. But the same biology that enables 112 km/h also generates catastrophic heat. Muscle temperature rises 1°C every 90 seconds of sprint. Past 40.5°C the cheetah is at risk of brain damage or death.
This is why cheetah hunts fail at a rate of about 50%. The cheetah has one shot -- roughly 20 seconds of full speed -- and if the gazelle makes it past the first minute, the cheetah has to stop, lie down, and recover for up to half an hour before it can hunt again.
Greyhounds are bred from sighthounds that coursed hares across moors and steppes. The selection pressure was endurance at moderate-to-high speed. A racing greyhound at the track runs 480 meters in about 29 seconds -- an average of 60 km/h -- and could keep that pace for minutes if the race continued.
Greyhounds also pant. They dissipate heat through respiration in a way cats can't. Cheetahs are obligate nasal breathers during sprint (they lock the mouth shut to maximize oxygen intake, which is why you rarely see their mouth open while running). That decision costs them heat tolerance.
Who wins depends entirely on the distance. The crossover point -- where the greyhound's endurance catches the cheetah's speed deficit -- is somewhere between 500 and 800 meters.
The cheetah wins by a massive margin. From a standing start the cheetah covers 100 m in about 5.8 seconds. A greyhound needs closer to 7.2 seconds. At the finish line the cheetah is 20+ meters ahead.
Cheetah winsThis is the cheetah's absolute limit. It might hold 90 km/h average over this distance; the greyhound holds 65 km/h average. The cheetah still wins, but the gap is closing.
Cheetah wins (narrower)The cheetah has to stop or fatally overheat. The greyhound keeps running at cruise pace. Somewhere between 700 and 1,000 meters, the greyhound overtakes the collapsed cheetah and finishes the race alone.
Greyhound winsNot a contest. The cheetah cannot cover this distance at speed. The greyhound finishes in under five minutes. Any cursorial hunter -- wolves, African wild dogs, even humans -- beats the cheetah at distance.
Greyhound wins decisivelyIn a 100 meter dash the cheetah is the fastest animal on Earth -- no mammal can match its peak speed. In anything beyond 800 meters the greyhound wins by default because the cheetah physically cannot continue.
This isn't really a flaw in the cheetah. It evolved for a specific task: catching gazelles in one ambush rush. The trade-off for that acceleration was everything else, and in its niche it's the best in the world. The greyhound was bred for a completely different task -- coursing -- and is best in its niche.
Short version: cheetah wins at 100 m. Greyhound wins at anything over a kilometer. The cheetah is faster. The greyhound is more useful.
