Bentleys and Porsches may be posh but they are prone to break down more than other cars, according to a survey.

What Car found Honda the most reliable, followed by Suzuki and Toyota.

The magazine looked at a car's failure rate, age, mileage and cost of repair.

The least reliable model was the Audi RS6 - which was also the most costly to fix, with an average repair bill of over a thousand euro.