This may be a no-brainer and this may be kind of a stupid, boring topic, but in a one-on-one showdown between an M1A1 Abrams and a King Tiger, who'd win?
the abrams would kill the tiger at 1000 to 2000 yards whilst the tiger crew are still looking for targets. If the tiger could attack from ambush and got to within 500 yards they could probably put a hole through the side or rear of an Abrams. The abrams could kill the tiger probably at any range it could hit it at. FNG
The Abrams would drive over to the King Tiger and knock it over by quickly rotating its turret and smacking it with the barrel.