Upmarket Bentleys and Porsches are more likely to break down than much cheaper cars, according to a survey. The two marques finished bottom of a 38-strong table of vehicle manufacturers judged on reliability. Scroll down for video . Reliability: Bentleys and Porsches are more likely to break down than cheaper cars according to a survey . The list price of Bentleys ranges from £136,250 to £224,700, yet the manufacturer and Porsche finished bottom of a 38-strong table judged on reliability . Thousands of cars aged three to eight years old were assessed on their failure rate, age, mileage and cost of repairs. The most reliable was Honda, with Suzuki second and Toyota in third place while Chevrolet and Mazda were joint fourth. Overall, the most reliable models were the Honda Jazz and Mitsubishi Lancer while the least reliable was the Audi RS6, which was also the most costly to fix, with an average repair bill of £1,003. Electrical faults were the most common across all cars, accounting for almost a quarter of visits to garages. Axle and suspension faults were also common, affecting 22% of cars. What Car? magazine compiled the table with the Warranty Direct website. What Car? editor Jim Holder said: 'Honda's success in the reliability index is chiefly down to low failure rates. But, when things do go wrong, the cars are also relatively cheap to fix. 'Reliability is always one of the key attributes buyers look for when considering a used car purchase, so manufacturers that consistently demonstrate durability will always do well with the consumer.' The list price of Bentleys ranges from £136,250 to £224,700.
Bentleys and Porsches finished bottom of reliability table of manufacturers .
Cars were assessed on their failure rate, age, mileage and cost of repairs .
Most reliable was Honda, with Suzuki second and Toyota in third place .