text: They put the 2 on a dyno. It's a mechanism that measures horsepower to the wheels. It's a better figure, and what u want to know when u want to find out what kind of power a car is making, being that manufacturers measure their hp numbers directly from the crankshaft. Due to drivetrain loss there is a loss in power from the power output from crank to wheels. It's a rule of thumb, that on average there is normally a 15% loss of hp in comparing advertised hp, and what a car really has. I was surprised that with the 5-speed there was really no loss in advertised power, once it was dynoe'd. I knew standard transmissions were less restrictive in making hp, just didn't think it would be next to nothing in hp loss.