In the books, Mole drove a Montego in Cappuccino Years (very fitting), and Pandora's very middle class father always drove Volvos. When she becomes a Labour MP in Cappuccino Years, Pandora drives various sports cars like Saabs and Mercs. And Mole's hated headmaster Mr Scruton drives a Ford Cortina in Secret Diary of Adrian Mole Aged 13 3/4 ("Pop-eye Scruton told me off for being late. It's alright for him, he drives to school in a Cortina. I have got plenty of problems and no car.") Apart from that Sue Townsend doesn't describe cars much, she never tells us what Mole's dad drives.