Originally Posted by Mike Rainbird
A 350bhp Cossie also hits 155mph easy as pie, but after that, especially at 170mph, each mph requires a LOT of extra power, as wind resistance builds up exponentially.... It takes 400bhp to hit 170mph in a Sapphire (at Brunters).
Also about gearing and what rpm the power is though.
A T4d 400bhp Cossie on a std gearing will do it easier than a T34d one just cause of the power being higher up, a genuine 170mph in a cossie is v.high rpm...