The 1985 Rothmans Grand Prix was a professional ranking snooker tournament that took place during October 1985 at the Hexagon Theatre in Reading. The final was a re-match of the 1985 World Championship final between Steve Davis and Dennis Taylor, the defending Grand Prix champion. It was Davis this time who became champion winning the match 10–9. The match became the longest one-day final in snooker history. It lasted 10 hours and 21 minutes.