Both were strong at their peaks, but seeing how the vikings were much more used to the sea life and raiding, and how the peak of roman military was extremely focused on conquests, i would say the romans would beat them. But in a water battle, vikings probably take the cake.
This a matter of opinion ,in retrospect I think the Romans were better because they were more advanced and were extremely intelligent.They had many strategy’s while the Vikings were more of a “Kill now, solve later” type of people.In a standoff between the 2 ,I reckon the Romans would win,in many battle they were outnumbered but still won by sticking together.In a battle again Boudicca and here 100,000 troops versus The Romans 10,000 the Romans won.
