IMO the ad's sole purpose is to generate enough interest that some potential buyers will contact you. Then you can determine what interests them and emphasize those points - not to mislead them but just to respond to their preferences.

So I would shorten the ad and focus on overall condition, and maybe that it has been properly/super maintained. I would mention the v8 because there are a few of us who will only buy v8, but you might have to mention fuel economy (hwy) in case the bigger engine scares off the Prius set.