Originally Posted by
fartoomanyusers
this report claims that the fuel burn per pax of the A380 is the same as the A340-600.
I'm a layman, but that does correspond roughly to other numbers you can find via Google and on Wikipedia.
Wikipedia says a fully fuel-efficient wing span for the A380 would be around 90 m, but Airbus chose slightly under 80 m due to legal restrictions and/or the desire to achieve compatibility with pre-existing ground infrastructure.