B747-400 fuel burn
Hi guys, am only SLF so apologies if this is an obvious question to some. Have been reading that the B747-400 is something less than cutting edge on fuel burn, not surprising as the design is a late 1980s one, dating back to the late 1960s in a few areas. So here's my question :
Is there going to be any fuel burn differential between two aircraft like BA's first N744 G-BNLA dating from 1989 and the 57th and last, 1999s G-BYGG. One is ten years older but I would guess the fuel burns would be almost identical? Is that about right?
Cheers.