Goku is a Super Saiyan of immense power and he could end the solar system in one shot. Sengoku could not match such a feat and he would quickly be overwhelmed. Goku exceeds him in all areas. When you have the edge in both speed and power, you will usually win the round. Sengoku is decently powerful in his own right, but he’s not in Goku’s league. Goku wins.