We calculated distance with our calculator and with the help of International map agencies and distance between Genoa and Sassari is 120 km.
If you go from Genoa to Sassari, with normal traffic conditions and non-stop driving, you reach final destination in 1,5 hours.
Depend on car conditions and fuel quality, to travel from Genoa to Sassari with car transport, you need 7 gallons gallons of petrol, which will cost around 10 $ with average prices.