TWO prestige-brand compact convertibles, to be introduced to the UK market this year, will establish a new benchmark for drop-top residual values, according to EurotaxGlass's, publisher of auto industry 'Bible' Glass's Guide.

When the newly-launched BMW 1 Series and Audi A3 cabriolets reach the second-hand market later this year, they are expected to command exceptionally high prices relative to their original cost new.

Initial demand for the German duo could well see used examples selling for near-list price, just as is the case for ultra-exclusive convertible sports cars from the likes of Aston Martin and Lamborghini.

Even as supply of second-hand units increases, EurotaxGlass's forecast remains strong, with the diesel models expected to hold on to 50 per cent of their list price after three years and 60,000 miles Jason King, head of market intelligence at EurotaxGlass's, said: "There is nothing else like the BMW or Audi on sale at present. Since the demise of the Volkswagen Golf, the market has lacked a small, desirable, fabric-roof convertible.

'Many manufacturers have opted to launch coupé-convertibles with folding hard roofs instead of the more traditional soft tops, a move which has failed to attract the more image-conscious drivers who like people to know that they drive convertibles.

"We believe that a good number of prospective buyers have been waiting for a compact cabriolet from a prestige-brand carmaker.

"For these consumers the 1 Series and A3, which have created a new niche in the drop-top market, will fit the bill."