Thomas Borchert wrote:
But indeed, the comparison is of limited value, as anyone would find
out who'd try to drive his VW from the US to Europe.

The comparison has meaning from an environmental point of view. Planes
have often been portrayed as being extremely energy inefficient,
consuming vastly more fuel per passenger than cars and generating plenty
of pollution.

This puts the 380 on roughly the same order of magnitude as very fuel
efficient cars, and gives the A380 better fuel economy per pax that
average US vehicles (which I think is more than 10 litres per 100km).