Tigers have relatively long legs compared to some animals, but they are not exceptionally long or powerful when measured against other big cats. Lions, jaguars, and snow leopards often have longer legs than tigers. These differences likely reflect the distinct environments each species inhabits.
Tigers are primarily forest dwellers, whereas many other big cats live in more open terrain. The longer legs of those species may be an adaptation for efficient movement across open ground. Tigers, by contrast, rely more on their muscular bodies, powerful jaws, and sharp claws to overpower prey much larger than themselves.
Ultimately, tigers are well-adapted to their forest habitats and remain formidable predators, even if they do not possess the longest legs among big cats.