Has there ever been a 8–6 in the Brasileirão?

Never.

It would be a scorigami. Based on the average number of goals in the Brasileirão, the chance of a game ending 8–6 is about 1 in 10,640,636.

Nearby scores

1. 9–5 Never
2. 9–6 Never
3. 9–7 Never
4. 8–5 Never
5. 8–6 Never
6. 8–7 Never
7. 7–5 1 time
8. 7–6 Never
9. 7–7 Never