Goku vs Nappa both in Oozaru form in Saiyan Saga

Goku since he was already way stronger than Nappa.

Nappa presumably knows how to control his Oozaru, which could give him an advantage. But Goku would just be too powerful.

Although it's possible that after drinking the god water, Goku already possesses his Oozaru power without transforming, in which case he'd be screwed.

goku would be stronger provided he can control that form. i would assume nappa can control his given past saiyans used this forms as conquering weapons.

Goku