I got 5.9% apr on my used CS, it was a 'special' offer at the time, the usual rate for used is around 9/10%. New car rates vary between models but the norm is around 5% apr. Over the term a bank loan will nearly always work out cheaper, a PCP will usually have a cheaper monthly and if values plummet you have the option of handing it back and the manuafacturer has to cover the loss. If you bank with the Haliafax they do a PCP scheme with competitive rates, Clydesdale also offer good rates but usually on lease purchase.