I have been down this route with the RTA, this is there response via email
I was and still am planning to bring my classic range rover over here.
Respected Sir / Madam,
Thank you for contacting Abu Dhabi Contact Center.
The Resolution Response to your case# 100-728335 is as follows:
Please note that in order to import a right hand car you will need to have it inspected, insured and complete the process in the Customs. There is no restriction regarding the car model.
Please note that the procedures for importation of classic vehicles are as follows: 1. Preview and vehicle matching the standard specifications of the UAE. 2. In the case of the declared value of appropriate invoices are resorting to an estimation of the value and levied customs duties accordingly. 3. Payment of customs duties by 5% of the customs value estimated. 4. Ensure the entry into force of the validity of residence document to the importer, if not nationals of the Gulf Cooperation Council for the Arab States of the Gulf. 5. After payment of customs duties granted customs vehicle registration certificate for the Traffic Department. 6. If the car is not on behalf of the importer must attach valid agency gives its holder the right to dispose of them and clearance. With a multitude of respect and appreciation
Importing a vehicle to UAE:
• Original invoice, original certificate of origin for new vehicles only.
• Certificate of vehicle matching the standard specifications of the United Arab Emirates.
• Payment of customs duties 5 present (include the value of the vehicle, freight and insurance).
• The validity of the residence document of the importer, if the importer is non-citizens of Arab Gulf Cooperation Council countries.
• If the vehicle is not under the owner’s name then a Power of Attorney is required to authorize the importer to process on behalf of the owner.
• After paying the fee the Customs grant a vehicle registration certificate to present it to the Traffic Department.
• Valid vehicle insurance certificate.