Genuine power is either dyno proven or track proven in my books. You're dead right - the amount of BS that goes on with power figures is a laugh. I'll probably cop some **** for this comment, but I would go so far as to say that a GENUINE 400hp in a Cobra would put it in the top 5 fastest cobras in the Queensland Cobra Club.
Oh yeah - I'm not too good at detecting sarcasm, so if you'r wondering if my 800+ is BS, it's been on the dyno with witnesses

I won't try to bluff anyone by saying it's the fastest car around, because it's not useable power. It is fun though !