A321 vs B757
A321 18-21 tonnes fuel capacity...?
IIRC AIR2000/FCA A321 pax capacity was 220 pax, all 'Y' or Economy Class. Just out of interest what's the config BMI/BA use?
B757 34.2 tonnes fuel capacity.
233 'Y' class pax MAN - BGR (Bangor, Maine) easily enough, MCO (Orlando - McCoy) to MAN Non-stop (if you had an ave. 35kt tailwind component).
Or with 208 Pax CPH-BKK or UTP & return with a tech. stop in BAH on the way out & back.
With 170 seat 2-class config. it can do UK/Western Europe to Eastern USA non-stop.
A321 & B757 similar in size, vastly different in capabilities.