after goku defeated Nappa, vegeta then battles goku in a wasteland. (This is in the saiyan saga which means vegeta only has the oozaru power and his power level is at 18,000 and goku only has Kaiokenx4.) Vegeta: ready to die KAKAROT!
Goku: not planning on it vegeta! you so happen to be there to defend goku against vegeta. Vegeta: and you will die aswell SAIYAN! (Vegeta is stronger than base goku, goku with Kaiokenx4 is stronger than vegeta, vegeta oozaru form is stronger than goku)