I worked for the RAC for 23 years, the reason for taking the veh reg number is to find your membership easier, it is shorter to type in than a name or membership number. there are membership policies that cover the car not the person but they are mainly used for corparate memberships, if you buy a Ford with RAC membership Ford are not overkeen on paying out if you break down in another make car. RAC personal memberships are the person not the car. Get the cheapest deal you can AA or RAC it makes no difference look for special offers, usually a patrol can give you a better deal than a salesman or internet, best deals are usually offers with your bank or insurance renewal. remember that with the AA and RAC you normally get a trained patrol with instant 24 hr back up, if you join green flag you get the local garage!
A true sports car should be designed so that when you sit in it you can put your arm over the side and touch your knuckles on the ground.