Has there ever been a 8–4 in the Primera Argentina?

Yes, 2 times.

The first time: November 2, 1913, Atlanta beat Sociedad Sportiva Argentina (Sociedad Sportiva Argentina 4–8 Atlanta).

The last time: November 10, 1935, Lanús beat Atlanta (Lanús 8–4 Atlanta), 90 years ago.

Home wins: 1. Away wins: 1.

Nearby scores

1. 9–3 2 times
2. 9–4 Never
3. 9–5 Never
4. 8–3 4 times
5. 8–4 2 times
6. 8–5 Never
7. 7–3 22 times
8. 7–4 5 times
9. 7–5 3 times

All games

1. November 10, 1935 Lanús 8–4 Atlanta
2. November 2, 1913 Sociedad Sportiva Argentina 4–8 Atlanta