For those that read quite a few magazines and have a tablet device, I have just discovered "Readly" Its a magazine app that for a monthly subscription (£7.99) you can get loads of magazines on 5 separate devices.
It has most of the car ones, Classic and Sports Car, Autosport, Classic Cars. It doesn't have Motor Sport or stuff from Dennis Publishing. It has some really good american ones too, Street Rodder ect.
Saved me a fortune as I read most of these!