What is the highest winning margin in an AFL Grand Final?

The highest score ever in the Hyundai A-League was in the 2006-2007 Grand Final

MELBOURNE VICTORY 6 defeated

ADELAIDE UNITED 0

where Archie Thompson scored an amazing 6 goals.

Also in the 2008/09 Asian Cup the Newcastle Jets were also defeated 6-0 by the Pohang Stealers (Chinese Team).

:)