A good quality car cover would provide the protection you need, and given the size and shape of your Porsche it might be worth choosing one specifically designed for your car. You can see our guide to car covers on our Honest John Kit website here: kit.honestjohn.co.uk/top-tens/top-10-car-covers/ Alternatively you could consider purchasing a set of car dollys - a set of four stands on castors which are fitted under the wheels and would allow you to wheel the car into the garage by hand, although this would of course depend on the amount of space on your driveway.