Originally Posted by
Robert Leach
I am unaware of any 757 other than a "regular" 757. There is no variant that I am aware of, other than a selection of different engine types.
So, I can't explain why Boeing says 3900 nm and Delta says 2600 -- unless there is some sort of auxiliary fuel tank added to reach the 3900 nm figure.
The fuel capacity is the same on all 757s. The max take-off weight ranges from 220k lbs to 255k lbs. DL's 757s are likely certified at the lower gross weights.
At the lower gross weight, you cannot max out the fuel with a full passenger load. A 220k TOGW 757 with 186 passengers and baggage has about a 2,500nm range.