Most people here own GTP's or have top swapped... that automatically puts them at 240+ HP versus 175. Thats 65+ Horse which is in your 50-100 HP range.
They're totally different engines...
High performance engines don't need to rev to be fast, see a 3800 with an M90 with a mild cam, intercooler and a 3" or smaller pulley..
THAT makes power.