The graph below shows the Topspeed & accleration of two cars.

The bottom one shows an EVO 6 with 520bhp belonging to a member of this Forum. He was flatout at 171mph & took a mile & a half to reach it.
Your mate should look at this before making such silly claims.

Dont mention the Topline he will probably die.

The Cossies owners claiming 170mph on f**k all Horsepower the same applies dont make such sily claims