Whats the differnce between the SVA and the new IVA???

If you do a search its been covered lots, The main difference is the cost. IVA is over £500 where as SVA is £200ish.

Also IVA requires reverse gear.

Yeah. Apparently it costs an extra £300+ to test reverse and a few other minor things

octobers edition of Kit Car magazine has a full write up explaining the differences.