you need to earn a packet not just to buy one and insure it but also running it, you fule economy would be shocking compaired to the 1.2, tyres, servicing anything that goes wrong is basically gonna cost you more.
you might find that alot of companies wont touch you witha barge pole, especially for a 2 litre hot hatch,
god i got nock backs for my 1.6 laguna sport, I was named under me dad, and was £600 fully comp, but decided to build a ncb. so i tried to insure it on me own.
i was 19 0ncb and a out standing claim because the woman refuses to take responsibility for her actions. some flat out said they would no insure me on that car or quotes me about 6 grand. so had to drop to a 1.2 clio, by that time i'd turned 20, had a years driving experience and still to this day alomost a year on have this outstanding claim and its costing me almost £1400.. my advise build ncb on your 1.2 wait till your over 21, at that you will have a mandatory excess of at least £150 over the voluntary. alot of places have these ecxesses, like 17-21 +£250, 21-25 +150, 25+ low experiance +£100. and those are cheap examples, norich union simple cover have a flat £375 excess plus the age excess but have the cheapest policy price, or tesco, very cheap but 17-21 £400 excess, 21-25 £250. I think i mightj be waiting till im 25 before i start playing with big cars again.