Well I am not a sifu or anything but I "used" to have a perdana v6 and a cefiro a33 2.0 v6 at home, and the acceleration of the cefiro is very bad to compare with the perdana because the cefiro a33 has a heavy body and the 2.0 v6 is not sufficient enough. So it would be better for you to upgrade to a VQ25DE/VQ25DD if you dont mind another RM500 for your roadtax :)