Chasing a target of just 136 to earn their fourth win in as many games, the Sixers lost eight wickets for 40 runs to be bowled out for 99 in 17.3 overs. Nottinghamshire???s Riki Wessels, who top-scored with 28, was one of only three batsmen to post double figures.
After the teams played out a tense tie last year, another tight encounter was expected at the SCG but it turned into anything but as Matt Dixon (2-22), Yasir Arafat (2-15), Andrew Tye (2-13) and Ashton Turner (2-3) cleaned up for the visitors at the SCG.
The Scorchers, who chose to bat first, had earlier eased into their innings at eight-an-over as top-scorer Marcus Harris (36 off 26) and Michael Klinger (16) bedded in.
The run-rate began to drift, however, once they were separated ??? Sean Abbott (1-33) out-foxing Klinger with a slower short ball and Harris reverse sweeping Luke Doran (2-22) straight to short third man.
A couple of run outs hindered their cause ??? Moises Henriques accounting for Michael Carberry (five), who was well short of his ground as the seamer cut off an attempted single into the leg-side and threw down the stumps at the non-striker???s end.
Adam Voges (19) also surrendered his wicket meekly, Abbott???s direct hit doing the damage after the Perth skipper was sent back by Sam Whiteman to make it 80-4.
Mitchell Starc returned to bowl Whiteman and Ashton Agar to finish with 2-22 and was only a fraction more expensive than Brett Lee, whose four overs cost 20 runs.
The total appeared sub-par until the Sixers slipped to 15-2 in reply ??? Michael Lumb pulling Dixon to short midwicket and Nic Maddinson falling to the same bowler thanks to a fine running catch by Agar at mid-on.
Wessels, whose half-century fired the Sixers to victory over rivals Sydney Thunder??on Saturday steadied the ship by sharing a 45-run stand with Henriques only to be run out by Andrew Tye as he was called through for a quick single.
Skipper Henriques soon followed Wessels back to the pavilion ??? out hit wicket for 23 after treading on his own stumps working the ball into the leg-side.
From 79-4 the Sixers offered little resistance as they slumped to 88-9. Tye trapped Jordan Silk (10) bang in front of middle and bagged another wicket as Abbott failed to clear Agar at long-on.
The procession continued as Starc fell first ball to Turner, who removed Doran for a single before the increasingly impressive Jason Behrendorff got in on the act by bowling Doug Bollinger.
Any hopes the Sixers had of surpassing their previous worst total in the Big Bash of 113-9 were ended for good when Ryan Carters slogged Yasir Arafat to jubilant captain Voges.