Quite abvious: the A380 is much bigger, weights almost three times the A300. Also, the A380 has four engines ins tead of two and has two decks instead of just on one for the A300.
The difference between the A300 & the A340 is that: -The A300 has two engines, A340 has Four '4 engines 4 long hual' -The A300 is a short to medium range aircraft, while the A340 is a long range...
The Airbus A300 is a short to medium range wide body airliner. It was the world's first twin-engined widebody, manufactured in 1972 by Airbus, and can carry around 250 to 300 passengers in a...