Has there ever been a 8–3 in the La Liga?

Yes, 7 times.

The first time: February 10, 1935, Real Oviedo beat Espanyol (Real Oviedo 8–3 Espanyol).

The last time: May 19, 1996, Real Valladolid beat Real Oviedo (Real Oviedo 3–8 Real Valladolid), 30 years ago.

Home wins: 6. Away wins: 1.

Nearby scores

1. 9–2 2 times
2. 9–3 1 time
3. 9–4 1 time
4. 8–2 13 times
5. 8–3 7 times
6. 8–4 Never
7. 7–2 26 times
8. 7–3 11 times
9. 7–4 2 times

All games

1. May 19, 1996 Real Oviedo 3–8 Real Valladolid
2. January 15, 1956 Real Madrid 8–3 Celta de Vigo
3. March 30, 1947 Atlético de Madrid 8–3 Espanyol
4. February 28, 1943 Valencia CF 8–3 Real Betis
5. February 7, 1943 Celta de Vigo 8–3 Granada CF
6. November 10, 1940 Sevilla FC 8–3 Hércules CF
7. February 10, 1935 Real Oviedo 8–3 Espanyol