You can only but ask and find out I'm afraid. Car finance and indeed any finance post IVA is a mine field of answers and decisions that just can not be second guessed. I waited for 3 years post IVA end date before even enquiring about PCP. By then my credit score was good and I had a good record of payments and no defaults showing. I was accepted without issue.
Last Payment made 04/12/14. Completion Certificate 25/7/15. IVA company GT. No Issues