The diesel-powered Mini 1.4TD is the UK’s slowest-depreciating used car, according to new analysis.

The car currently has an average trade-in value of 63.3%, which is better than that of any other used car currently on sale.

Despite retaining its crown, the car’s trade value has slipped from a peak last year of 71%.

“This illustrates how no car is immune from the downturn in used car values,” said Adrian Rushmore, managing editor at EurotaxGlass's.

The survey also identified those used cars that have the lowest retained value. Worst performing is the Alfa Romeo 166 which, after three years and 37,000 miles, has a trade-in value of just 12%.