Bell made 114 in an England first innings of 644 that easily surpassed Australia's first's innings total of 280.
England needed to take only three wickets when play resumed on the final day and after a short delay for rain, Graeme Swann, Jimmy Anderson and Chris Tremlett finished off Australia for 281.
The Ashes victory was England's first in Australia for 24 years.
England's Alistair Cook, was the player of the match and of the series.