Ever wondered what the most expensive car is? This is the top 10 most expensive cars, all sold at auction, some of which are so rare they cause a media frenzy when they go up for sale. All the names should be familiar to you, they are of course the big ones!

During the 1920's, Bentley was very successful at the Le Mans racing, winning first in 1924, and then again every year from 1927 to 1930. This 1930's Speed six is the finest surviving winner and sold at Christie's Le Man Classic in 2004.

This was not only a pure race care, this was the car that won the 1953 24 Hrs Le Man for Ferrari. It went under the hammer at a special auction at Ferrari's Maranello factory.

One of the rarest cars ever made. Only 36 were made and not many have survived. This model was sold in 1991 in Las Vegas. It was the last known sale of a GTO anywhere in the world. If one came up for auction today, some claim one would fetch upwards of £20million.

Bill Harrah sold this !931 Bugatti in Reno in 1986 at an evening auction just for classic Bugatti's. It came from his 1400 car collection and is regarded by many as one of the finest ever made.

London, late 2007, this Rolls Royce not only became the most expensive pre 1905 car ever sold, it also became the most expensive Rolls Royce ever sold.

One of only 33 ever made by Mercedes Benz. This SSK Sold in Suffolk, UK back in 2004, making it at the time the most expensive Mercedes in the world.

3 years after the SSK sold, this fine example of a '37 540K Special was put up for auction by F1 boss Bernie Ecclestone. It set a new record for a Mercedes Benz by outselling the SSK by $800,000.

Another classic Ferrair to be sold at the 2007 Maranello factory auction (1953 Ferrari 340/375 M Berlinetta Competizione), this one however was the very last race car Ferrari used with a front mounted engine. It was driven in the 1962 24hrs Le Mans by Phil Hil and Oliver Glendebien.

Being one of only 6 ever made, and featuring a 12.7 li engine (meant for an aircraft!) This Bugatti sold at a special Christie's auction at the Royal Albert Hall in London 1987. In today's markey it could well be worth double that figure.

The 1961 California Spyder is regarded as one of the most beautiful cars ever made. Of the 36 ever made. In 2008 this perfect model was put up for auction by former owner, Oscar winning actor, James Coburn. It was bought by British Radio 2 DJ Chris Evans for the staggering £10.9million to become the most expensive car ever.