And Hansen has called on the Welsh public to get behind his men as the Red Dragons try to match the pace and power of the Pacific champions.
'Fiji have just won the Pacific Championships, that means they are better than teams like Samoa and we all know what they have done to Wales in the past,' said Hansen.
Western Samoa knocked the 1991 Wales side out of the Rugby World Cup with a victory in the pool stages and Hansen believes Fiji have the flare, speed and strength to worry Wales if they are not right on their metal.
'We know we need to sharpen up on the performance against Romania, we broke their defence down often enough, but we where lacking the scoring pass on a number of occasions.
'Their will definitely be changes to the starting line-up for Fiji, it's going to be a fast and furious match and we know we are going to have to speed up all over the field in order to keep up.
'But we are more confident after a good win over Romania and I expect us to be sharper and improve anticipation and lines of support running.
**Click here to view player profiles
'If we can get a good Welsh crowd behind us baying for an exciting game of rugby, then I think we can pull of a performance to be proud of.'
Hansen annnounces his team on Thursday this week and has admitted therewill be changes from the side that beat Romania 40-3 in Wrexham last Friday night.
Fiji off to flying start
Wales win in Wrexham
Hansen happy with victory