It depends from the weight of the car and the suspension set up - system. To a modern car (weighting 1200kg+) I would say 250 bhp with lsd too. A friend of mine had a starlet GT 170bhp (700kg) wich I was also driving sometimes and it was understeering a lot on throttle. It was an animal and hard to take it on the limit but very capable of leaving today spec 300hp cars behind. That's why it was called "pocket rocket"!