| League | Sunbrite British League |
|---|---|
| Season | 1989 |
| Champions | Oxford Cheetahs |
| British League Knockout Cup | Cradley Heathens |
| British League Riders' Championship |
|
| Highest average |
(10.91) |
| Biggest home win | Oxford Cheetahs 63-27 Belle Vue Aces |
| Biggest away win |
King's Lynn Stars 33-57 Belle Vue Aces Swindon Robins 33/57 Cradley Heathens |
The 1989 British League season (also known as the Sunbrite British League for sponsorship reasons) was the 25th since its establishment in 1965. The league operated as the top-tier of British speedway. The Coventry Bees were the defending champions from 1988. The league was once again run over a 15-heat formula, with 7 riders per team. The season ended with Oxford Cheetahs winning their third title in five years.
M = Matches; W = Wins; D = Draws; L = Losses; Pts = Total Points