Has an AFL game ever ended 27-25?
Exactly once. On May 18, 1901, Carlton beat Sydney 27-25, and no AFL game before or since has ended that way. When it happened it was a scorigami, the first 27-25 in league history.
That makes 27-25 the 3836th most common final score out of 6,607 that have ever occurred in AFL. One point away, 28-25 has happened 2 times and 27-26 has happened 1 times.