Ian Bell struck an England list A record 187 as the tourists ended their preparations for the Tri-series against Australia and India with a 60-run win over a Prime Minister's XI.
The Warwickshire batsman cemented his place in the England team ahead of the World Cup with a timely century in a total of 391 for 6, which saw fellow-opener Moeen Ali and James Taylor both make half-centuries.
Jos Buttler's cameo of 25 from 14 balls catapulted England just eight runs short of the record total against a PM XI and left their opponents a daunting total to claim an unlikely win in Canberra.
In reply, Stuart Broad continued his recovery from knee surgery last year with 4 for 40, which included the dismissals of Australian Test pair Glenn Maxwell (136) and Pat Cummins (27) while two wickets apiece for Chris Jordan and James Tredwell helped England finished off the tail.
Victory represents a second straight win heading in the World Cup warm-up Tri-series, which starts against Australia on Friday 16 January and then sees Peter Moores' team face India prior to a potential final on 1 February.