The reason that there is a rev limiter in park and neutral is so retards won't sit there and blow their motor trying to see how high it will rev. Also the redline is 7000 just because the tachometer has a red bar that continues from 7k up does not mean it should rev that high.
Also, if your 4cyl tour was stick shift, it may have felt zippier than an ATX v6.
-FD
