I used to have a 2.0 cavalier with a 60 litre tank and would easily do this journey on a tankfull,
so petrol @ �1.30 a litre x 60 = �78 but weather, driving style and the condition of your car and tryes pressures , the type of roads can all make a differance hope this help
Hire a small diesel car from your local back street garage and you'll find the offset of the petrol you put in a 2litre will pay for the hire of the car plus the diesel....