actually this has been discussed over n over again... try do a Search about "top speed" or "horse power" or anything... browse the older topics in this forum...
or u can see here...
http://www.zerotohundred.com/newforums/showpost.php?p=939851&postcount=7
but he is talking about 4G13 engine la... but some of the info can be used... so u agak la ya?