The injured Ryan Harris did not take his place leaving Ben Hilfenhaus to take the crease. The paceman was out to Tim Bresnan for a fourth-ball duck, caught behind to wicketkeeper Matt Prior to complete the innings.
Brad Haddin enjoyed a swashbuckling partnership with Siddle, striking four boundaries and a six off Graeme Swann, but was left stranded on 55 not out.
Strauss's team became the first to retain the Ashes in Australia since Mike Gatting lead the tourists to a 2-1 series win in 1986/87, the decisive victory also sealed at the MCG.
Tim Bresnan, called into the side for Steve Finn, was the pick of England's bowlers in the second innings, finishing with 4-50 after ripping through Australia's top order after tea on day three to quash the hosts' slim hopes of salvaging the test.
Image: England's captain Andrew Strauss, center, celebrates with teammates at the end of the fourth Ashes cricket test against Australia at the MCG in Melbourne, Wednesday, Dec. 29, 2010.