In the final round, Stenson, who closed with a birdie at 18, carded a 4-under 68 to finish at 15-under-par 273. In 2005, he gave up a two-stroke lead in the final round.
Broadhurst shot a 2-under 70 to finish alone in second place at 12-under-par 276. Darren Fichardt, the 2003 champion, closed with a 4-under 68 and was alone in third place at 11-under-par 277.
Nick Dougherty (70), Niclas Fasth (73), Richard Finch (72) and Ricardo Gonzalez (72) all ended in a tie for fourth place at 10-under 278. World No. 3 Ernie Els, who matched Bernhard Langer's record of consecutive cuts made on the European Tour at 69, shot a 72 and ended tied for 13th place at 5-under 283.