They competed in the NSWRL's 1991 Winfield Cup premiership and failed to reach the finals, finishing 7th (out of 16).
Three Broncos players, Paul Hauff, Willie Carne and Andrew Gee were selected to make their international debuts for Australia in 1991.
In the 1991 NSWRL season the Broncos again won the Panasonic Cup competition.
However they didn't perform consistently enough during the season, only gaining momentum in August, when they won their last five matches straight.
[1] The club finished the season in seventh place, missing the finals despite winning their last 5 games consecutively and finishing with the second best points scored total in the League.