Rising fuel prices and interest rates are adding more than £100 every year to the cost of running a car, according to figures released on Wednesday.
The average cost of keeping a car on the road is now more than £100 every week, according to RAC Insure.
And motorists face even bigger bills in the months ahead with further petrol and interest rises expected.
Managing director Nick Hall said: "The rising cost of motoring is testing the mettle of British motorists."
Mr Hall added: "The monthly cost of running a car remains about the same as the average person's contribution to a family holiday.
"And the continued threats of increases
in petrol prices, interest rates, taxation and insurance premiums cannot be ignored."
RAC Insure said the average cost of running a Renault Espace was likely to be more than £8,000 a year.
At the other end of the scale, a Toyota Yaris driver would have to spend £3,482 to maintain their vehicle.
Despite the latest RAC figures, it is predicted that as many as 425,000 new cars will be snapped up this month.
Meanwhile What Car? magazine believes that drivers who haggle could save up to £1,600 on new vehicles.
Citroen Xsara Picasso, the BMW 7-series and Jaguar XJ 4.2 are said to be the best models to go for cut-price deals.