there are other engines that would fit in the VX... i believe someone said you could pretty easily fit a direct injected version of our engine from an axiom into the VX with the addition of the computer from the direct injection engine in place of our stock one.. that would give you more HP and better fuel economy, dont know about the price difference but i wouldnt think it would be a drastic difference

i dont think the UK/Japanese version of the VX have the same engine as the US model... iirc those versions have a 3.2L instead of the 3.5.. dont know the difference in the two as far as power or durability go though