In reply to SamSimpson:
I think you'd be better off taking an unsecured loan like a personal loan for something like that. You should be able to get enough from whatever high street bank you use if your credit history and income numbers are ok.
Any time I've ever looked at getting a loan secured against a depreciating asset like a vehicle or spoken to anyone else who bought their vehicle with finance from a car dealer, the APR is always just atrocious in comparison to a personal loan.