Yes, they're both twin engine aircraft. As an avgeek, the LH A340-600 has always been one of my favorite planes to fly. I like the 2-4-2 layout in economy (usually traveling as a couple) and the lavatory located "downstairs" is a pretty neat quirk.Double Boo. I always love seeing 4-engine planes (the A340) coming in/out. Unlike the A340, the A350 and A330 are double-engine, I believe?