You cannot put 550 hp in a car without paying the closest attention to its other systems—in other words, steering, braking, handling, suspension, weight, etc. That is obvious, and that is why the 662-hp Mustang Shelby GT500 is a bad joke, even at its $55k price.
The horsepower wars are typically American, kind of like trying to pack the most calories into a Big Mac. Adding more bacon and cheese doesn’t make the meat any better.
Aston Martin’s much-revised 2013 DBS is supposedly based (in styling, at least) on the One-77 supercar shown above. That V12 beast has 750 hp, which, you can be sure, will be perfectly applied to the ground.
The more-or-less custom-built One-77 (only 77 cars built, now sold out) began around $1.5 million. The present DBS starts at $275K. You simply cannot achieve anything close to that kind of performance for $55K. Aston Martin hasn’t released prices yet and has said very little on what the 2013 DBS will cost.