Originally Posted by jaje
it maybe true for the current version but the previous model did not make the advertised hp
I remember Mazda getting into a lot of trouble with the previous generation Miata because the original specified horsepower was based on the Japanese Domestic Market (JDM) engine. When the Miata's engine was certified under US emissions certification, it lost nearly 15 horsepower (SAE net).
The current Mazda MX-5 is truly rated at 170 bhp SAE 08/04 net, so the car is actually just as fast as the turbocharged Miatas sold previously.