Can we upgrade a 2.7 Hyundai Tib V6 to a 3.3 litre V6.?

 

The 3.3L is a totally different engine than the 2.7L. Externally larger too (not just displacement). Anything is possible with enough money and time but it won't be an easy swap without a lot of modifications. Do yourself a favor, buy a Genesis coupe with the 3.8L V6 instead. It will be cheaper, better and faster (and RWD).