I'm 20 and i have done quotes online via gocompare.com on a 1.6 vts saxo and on a 1.8 ford escot gti with one years no claims bonus third party fire and theft and the gti worked out a cheaper by a couple of hundred pounds.

The insurance companies do ovbiously blacklist some cars against common boy racer ones ie. saxo vts. Your first few years insurance will be a mug off. The lower the litre and older the car the better.