an na 4age will keep up with a commodore 6, however compared to the xr6 in a straight line you might not find it to be massively inspiring. 86's are all about being able to carry a higher speed through corners so if you're out in the further parts of the SE suburbs in melbourne you can have a lot of fun. if it's power your seeking there's a few options, an sr20det is a cheap and readily available option otherwise for n/a there's a beams 3sge or the f20c(which requires a fair bit more work if you don't want to lower the crossmember). hope this helps a little