Opinions tend to vary on the Abrams vs. the Leopard 2. Both are offshoots of the canceled MBT-70 joint development between the USA and West Germany. Some people swear by the Abrams, and some swear by the Leopard 2. However, it's very unlikely these two tanks will ever face off against each other, so the ultimate determination of which of the two ranks better isn't likely ever to be seen.
Additionally, the Leopard 2 has yet to see all-out combat service, with its only combat deployments being to Kosovo and Afghanistan, where enemy armour isn't going to be encountered.
The M1 Abrams.
The most advanced tank in the world is the M1 Abrams Battle tank that is for the U.S.
The biggest tank in the world would probably be the US M1A2 Abrams main battle tank.
Abrams Battle Tank was created in 1988.
Abrams Battle Tank happened in 1988.
M1A2 is the more advanced model.
It is among the most advanced in production, though it's not the only such tank in existence.
M1 "Abrams" tank perhaps?
General Dynamics
this answer is not ture for many reason one. the m1a1 is a out dated verison of the m1a2 and the most advanced tank in the world is the British Challenger 2
The Chrysler Corporation invented the M1 Abrams tank. They later sold the Chrysler Defense division to General Dynamics.
The Challenger. Although the Abrams is one of the three best in the world, the Challenger has greater accuracy, greater offroad speed, superior armour and improved firepower. American tank armour is made by a British company and acted for the Challenger's armour's prototype. Challenger armour has been improvd twice since then.