7920 Balls bowled in in this series. Among all series of five or more Tests in which each game has had a decisive result, only twice have there been fewer balls bowled: in the West Indies-England series in the West Indies in 1985-86, when only 7699 deliveries were bowled, and the 2001 Ashes in England (7868 balls). The entire series lasted 18 days, which is the joint-fewest for a five-Test series, along with the England-West Indies series in England in 2000.
0 Number of five-Test series, before the 2015 Ashes, in which no Test went into the fifth day - this is the first such five-Test series. There's only been one four-Test series in which no match has gone into the fifth day, and that was also in England, when Pakistan toured in 2010 - England won that series 3-1.
5 One-sided Tests in this series; the margins of victories were 169 runs, 405 runs, eight wickets, an innings and 78 runs, and an innings and 46 runs. There have been only three series in which the result margins were so decisive each time (eight or more wickets, 169 or more runs, or by an innings): West Indies in England 1984 (West Indies won 5-0), India in England 1959 (England won 5-0), and South Africa in Australia 1931-32 (Australia won 5-0). This is the only instance where one team hasn't been the dominant one throughout the series.
5-2 The series win-loss record for England in their last seven series against Australia, from 2005. In terms of Test results, though, Australia lead 15-13 during this period.
43 Wickets for Peter Siddle, in 11 Tests in England, at an average of 28.37. Among countries where he has played more than one Test, he has a better bowling average only in Australia - 112 wickets in 30 Tests at 27.16. (Click here for Siddle bowling career summary.)
4 Instances of teams losing an Ashes Test by an innings after winning the series. On each of the previous three instances, though, it was Australia who lost by an innings after sealing the Ashes: in 1974-75, in 1924-25, and in 1891-92.
With inputs from Shiva Jayaraman.