If the money you spent on repairs is because he sold you a faulty car you will be able to claim it back.
You have ill evidence to show that the car was indeed not as described and had faults at the point of sale. An independent report from a mechanic is good.
You have to act quick because the protection under the Consumer Rights Act 2015 is only for 6 months from the date of purchase.
Here is a template you can use to send him a letter.
LETTER BEFORE ACTION
Re: Claim for (insert sum)
I refer to the above matter. (Insert details of the dispute). The vehicle has several faults and I am fully aware of where I stand under the Consumer Rights Act 2015. The Act gives me protection if the vehicle is faulty (which it is) and if it is not "as described". The faults are serious enough to affect the car's purpose and as such they are caught by the Act and gives me a right to reject, repair, or for a replacement vehicle.
I would normally be entitled to a refund, or a repair - a repair is only possible under the Act if it would not put me at signifiant inconvenience which it would given how far away I live from your dealership. I would prefer to keep the car however I have incurred costs amounting to £..........., evidence attached. I now ask that you pay these to me in order to settle the dispute.
This letter is being sent to you in accordance with the Pre-Action Protocol (“the Protocol”) contained within the Civil Procedure Rules (“CPR”). In particular, I refer you to paragraph 7 of the Protocol, and paragraphs 13 to 16 of the Practice Direction on Pre-Action Conduct and Protocols regarding the Court’s powers to impose sanctions for failing to comply with the provisions of the Protocol.
I therefore put you on notice of my intention to issue county court proceedings against your company for my losses should I not receive payment in full by 4 pm on (insert date 14 calendar days). I will also report this matter to Trading Standards if you unreasonable refuse my request.
Should court proceedings be necessary I will claim the court issue fee and statutory interest. Should I succeed in obtaining a judgment, same will be transferred to the High Court for enforcement against you whereby further costs will be added to the judgment sum.
I trust the above will not be necessary and I therefore look forward to hearing from you as a matter of urgency.