Brand new to the Prius

I don't own a prius but i have the pleasure of working on my friends 2010 prius. Can someone tell me the difference between the I, II, III, IV, and V?

 

+1 +1

:welcome:

 

The numbers represent levels of equipment...usually in packages. Base Prius is 1 and V is the works (except you can't get a few items like sunroof on V) and each level up is more $
It will get more confusing with the new models since Prius is expanding as a brand...V will be a slightly larger wagon like model...
You can go to Toyota's home page and compare equipment etc.

 

Oh ok. Thanks for the info. It was really helpful.