Id reckon at 170bhp you give them a bloody good go. Kerb weight spose to be 980kg.Weight from 980 to 1080kg.Always a mixed convo about what the weight is but far as im aware from the last convo about weight was agreed upon 980kg.

So at 1000kg weight it be 170bhp per ton,less than 1000kg you have more bhp per a ton etc etc.

Rough guide

980kg = 176.25bhp
1000kg = 172.73bhp
1080kg = 159.93bhp

You need to find the weight of a type r etc and see what bhp you need and don't forget torque figures too.