Mitchell Aubusson scored a try in each half as Sydney Roosters eased to a record 36-4 thrashing of Brisbane Broncos at the SCG on Thursday.

The defending champions scored seven tries to seal a third win in a row - and their biggest ever against the Broncos, who have just one victory from their first four games of the NRL season.

Trent Robinson's side had a one-sided contest all-but wrapped up at half-time after crossing four times in the first period.

Matt Ikuvalu sent them on their way with a four-pointer which was set up by Joseph Manu - and Angus Crichton marked his late inclusion in the side by going over before Aubusson came off the bench to add a third try, laid on by the fit-again Cooper Cronk.

Daniel Tupou dotted down after leaping to take a kick from Cronk, who came off with a left shoulder injury before Matt Gillett's try finally got the Broncos on the board after 54 minutes. 

Gillett's score failed to ignite Brisbane, though, and the slippery James Tedesco sidestepped a couple of tackles to go under the posts, then Aubusson had a double three minutes later.

The rampant Roosters added insult to injury with an incredible score from Manu following a series of offloads and kicks in a move that started in their own half.