Well in my opinion I think Goku would win. Unless he was holding back and if Bardock knew he was holding back he would tell him to fight. Full Power without going super saiyan.
Bardock, probably. He was the 'Legendary' Super Saiyan, not Broly... So, Goku would have some trouble against him, I would imagine. Then again, we can't discount Goku's SSJ4 transformation, or his SSJ3 one, either. The time for when this kinda battle would happen and which form Goku was in really needs to be defined here.
Goku would win.Goku gave frieza a hard time as for bardock he lost in one hit.I dont kno why people keep saying bardock wil win.Bardock has a power level of 10,000.He couldnot even beat vegeta in saiyan saga