well lets see:
A> the original 727 (-100) was competed with, the Dc-9-30/-40/-50 all did a fine job.
B> By the time the 727-200/-200ADV became a major factor, MCDD was in trouble already with the DC-10 and didn't have time to worry about something in that size class. Eventually the MD
-80 program came along and that did compete with the 727-200 for a few years till Boeing ended production and switched to the moderately successful 757.
C> The only true 727-200ADV competitors Boeing ever saw: Trident 3B (underpowered and under ranged), Tu-154 (very good equivalent from the Eastern side of the iron curtain) and one that never got far: Mercure 200 (died due to US/France relation strains).
Those who would give up Essential Liberty to purchase a little Temporary Safety, deserve neither Liberty nor Safety.