Originally Posted by
Probe
As far as single or double isle, double isle isn't any good until you get to 9 across. The 767 was 7 across. For 1 extra seat per row, you also got an isle. The 767 was 50% heavier than a 757, for 16% more seats. That was not a good tradeoff. There will never be another double isle aircraft with 7 across seating in coach.
But the 767 blows the 757 away with cargo capacity and range. I routinely come back from Europe with a car and pallets in the belly. The capability and mission are totally different, which I'm sure more than absorbs trade off of weight and capacity.