Alabama would be a 2 TD favorite over UCF easily IMHO, and probably have beaten them 35-7 or so.
Auburn was not that great a team, despite their wins over UGA and Bama at home. They had a good D and one good running back, but they were a better than average team that got beat by UCF, who also has a better than average team.
Now, if Alabama had been relegated to the Peach Bowl, they might have lost to UCF, but not if it mattered.