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Difference Between A330 And A340  
User currently offlineCory6188 From United States of America, joined Feb 2004, 2692 posts, RR: 5
Posted (10 years 9 months 3 weeks 4 days 10 hours ago) and read 19161 times:

I know this is a really basic question and this might drive some of you crazy, but what is the real difference between the A330 and the A340? Their interiors are the same (2x4x2) in coach, yet one has four engines and one has two engines. I know I could research on Airbus's website to find out the differences, but I know that everyone here could probably provide me with a better and more concise explanation.

I have never flown on either type (being near EWR I primarily fly CO, and as you all know, they are all-Boeing), so I apologize for my ignorance. I know this basic question may bug some of you as much as the replacement of NW's DC-9s, so I will be protecting myself with some flameproof armor...  Big grin

4 replies: All unread, jump to last
 
User currently offlineQ330 From Australia, joined Dec 2003, 1460 posts, RR: 21
Reply 1, posted (10 years 9 months 3 weeks 4 days 10 hours ago) and read 19082 times:

That's not an entirely silly question, because the A330 and the A342/A343 are very similar. The A330-300 shares the same fuselage length with the A340-300 and both aircraft have almost identical flight systems. The biggest difference is that the A340 has 4 engines, greater range, a higher maximum speed and a greater MTOW. The next-generation A340s have more differences compared to the A330. The A345 is ultra-long range while the A436 is the longest commercial aircraft in the world and the largest Airbus currently in service.

-Q



Long live the A330!
User currently offlineA330Jamaica From Canada, joined Dec 2003, 59 posts, RR: 0
Reply 2, posted (10 years 9 months 3 weeks 4 days 9 hours ago) and read 19002 times:

The A330 as you know has two engines and the A340-200/300 has four smaller CFM56 engines, similar to those used on the A321, A320 DC8 70's series and 737-300 through 900. They are identical in physical fuselage and wing dimensions but the A340 is heavier, carrying more fuel and thus longer ranged. The philosophy by Airbus was that each aircraft would be tailored to a specific market, the 340 on long/ultra long routes whereas the 330 for medium - long haul routes. Hence the A330-300 is most appropriate for example on North Atlantic and lengthy intra-regional flights whereas the A340 is a true long-haul airliner optimized for flights over 5000 miles. The A330 is the more fuel efficient of the two, in fact it is among the most fuel efficient airliners per seat mile. The A340-300 is however efficient over long haul sectors. It must be noted that long haul/ultra long haul flights are not as fuel efficient per seat mile owing to the need to lift a large mass of fuel and a heavier aircraft transporting fewer individuals (smaller available load).

User currently offlineCory6188 From United States of America, joined Feb 2004, 2692 posts, RR: 5
Reply 3, posted (10 years 9 months 3 weeks 4 days 9 hours ago) and read 18948 times:

Thanks for clarifying all that. I had always assumed them to be like a 767/777 relationship until I learned that they were of similar size. Is there type rating commonality between the two types like the 757/767? It would seem to be the case considering how similar they are.

User currently offlineA330Jamaica From Canada, joined Dec 2003, 59 posts, RR: 0
Reply 4, posted (10 years 9 months 3 weeks 4 days 9 hours ago) and read 18928 times:

There is in fact a common type rating between the types. In fact, A330/340 pilots after a very short conversion course can also fly the A320 series aircraft. That is one of the major selling points of the newer Airbus jets.

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