Originally Posted by Evolved

So what dealer sells a model of car that they don't have on the lot and that they will sell you only if you buy it first without test driving it.

On the analogy scale this is probably a 3 or so. Try this analogy:

Are you A. a person that buys something based on specs and sight unseen or B. someone who buys on specs but insists that you can either return it if you are unsatisfied with it or must be allowed to try it out first.

It is a much simpler approach. Plus unlike with cars we can swap out every 2 years with only a small penalty of extending our contract. Oh man I wish I could do that with cars. Sweeeeeeeetttt!!!!!!

EDIT: Wouldn't the V6 with 330hp be the obvious choice since 20hp is not enough of a performance boost to overcome the inherent weight gain of a larger engine(assumed larger since it has 350hp). If the V8 producing 350hp is in fact the same size as the V6 then technically speaking it is a more efficient engine since it wouldn't have to work as hard as the V6 would. I.e. 3.5Liter V6 producing 330hp is less efficient than a 3.5L V8 producing 350hp because the V8 makes more horsepower per liter thus making it a more efficient engine.

P.S. Don't go on HP per cylinder because that isn't a performance measurement.