A week in Corsica is spent on the road. This loop starts and ends in Ajaccio: first the far south, from Sartène to Bonifacio and the beaches of Porto-Vecchio, then the mountains, over the Bavella pass and through Corte, and finally the Gulf of Porto, with Scandola and the Calanques de Piana. Ajaccio has an airport and a ferry terminal: you arrive there by plane or ferry and return the car there.
Allow about 510 km and 9 hr 30 min of driving over the week, outside summer and without stops, with 1 hr 30 min to 2 hr 45 min on the road between one town and the next. It is a brisk pace: only two nights in the same place, in Bonifacio, for the boat day to the Lavezzi.
In summer, the roads are slow: camper vans, coaches, narrow mountain roads and villages to drive through make every journey longer. Build some slack into the times on this page, and book your ferry and hire car early. Useful links: the ferry crossing, car hire and journey times in Corsica.
The north is not part of this loop. To add Bastia, Cap Corse and the Balagne, follow Corsica in 10 days, which repeats the first five days and goes all the way round the island.