Depends what car.
If a Cossie I think youl b lucky.
If an e36 m3 I think it will b a piece of piss.
They do 180 as STD.
Buy 1 for £2.5k
£4k on a supercharger kit and few other bits,
£800 on nitrous
£800 on brakes
£800 suspension
£800 roll cage
the rest on bits and bobs, strip the car and 200mph job jobbed. And probably a bloody good track car to.

As your buying a 2nd hand car, you could get 1 1/2 done for a few extra £££
£4k will get you a good evo with suspension, strut braces, air filter, exhaust....
Plus you can sell off the bits that are removed like leather for £500.....