The world's most expensive car is up for sale. And whether or not you think it's worth the estimated $10 million asking price, it's no doubt exceedingly rare, beautiful and--like many follies in automotive history--a triumph of hubris over reason.

This Bugatti Type 41 Royale was the brainchild of Ettore Bugatti--and also a hugely expensive misstep in the history of his firm. In the 1920s, Bugatti was expecting to get a contract from the French military to build 16-cylinder aircraft engines. The contract never materialized, but Bugatti felt he could use half that engine, a straight eight, to form one of the most amazing luxury cars in history.

The car sold for a record £5.5 million at London's Royal Albert Hall before an audience of 4,000 enthusiasts. Now the present anonymous owner--believed to be Japanese--has commissioned Bonham & Brooks in London to offer the Bugatti Royale for resale to anyone willing to pay the asking price. (Offers should be made through Bonhams' offices in London: 011 44 20 7393 3822.)