Advertized Horsepower? For a 2009 or 2010 GT-R $35,000 to $200,000 you can void Nissan warranty. Engineers are always trying to make a better sports car very often more power and better road manners are hard to come by. Large top mounded turbos massive modifications to cooling and fitting exhaust parts. There are some reported 1000 hp under 9 second 1/4 mile cars. Lot's of noise and hype.