I think you can get the V8 diehards to spend more for a V8 model, because they want a V8 and have the funds to do so. In other words you're keeping it around not because it is functionally top of the line but because of suckers like me who just want a V8 no matter what*
* I'm slowly becoming more accepting of a pure electric performance car, thanks to the crazy electric Z06 that some company is trotting around