An alligator weighs between 400 and 800lbs, and it stands about 2ft off the ground. Tigers usually weigh between 500 and 600lbs, stand 3-4ft at the shoulder, and grow up to 12.5ft long
Tigers can move at very fast speeds of up to 40 mph. Alligators tend to move at rather slow speeds on land between 9.5 and 11 mph with bursts of speed over very, very short distances.
Tigers use their size, defensive posturing, and speed to get away from danger. alligators have thick and scaly skin, offering them some protection against attacks.
A tiger would win a fight against an alligator. However, this ruling comes with a few caveats. If a hungry tiger decides to attack an alligator on land, the alligator would have no chance.