If you can't afford it, don't buy it. No point in living out with your means. A Clio 182 is not the sort of car I would have bought at 19 on a relatively low wage. There is more to life than running around in a nice car...pensions, savings and getting on the property ladder are far more important than the size of engine in the front of your car.
Getting in debt to buy a car is stupid. You end paying more for something that is depreciating. Easy term credit is the reason so many people are in a financial mess.
When I was earning £800 a month I had a £800 Polo GT. Cheap to tax, insure and run. It was fun and was well within my means. Sometimes I struggle to run the Clio as I've just graduated and don't start full time until October. Things crop up (hit a deer) and you find yourself with unexpected bills (£400) that is then followed by expected bills...£400 tyres...service...new engine mounts...tax...insurance...once it all piles on you can be looking at some big ol' number that are way above your monthly income.
It sounds like you need to go back to owning something like a VTR.