The A380 and the A340 are two quad-engined aircraft built by Airbus, and the only airline where they can be found operating side-by-side is Germany’s Lufthansa. The Airbus A380, also known as the ‘superjumbo,’ consumes much more fuel than the much smallerAirbus A340, but this is a meaningless comparison in isolation, as the A380 such a different aircraft. What is more important, however, is the relative fuel consumption per seat for a given distance flown.