World's 7 Most Expensive Cars

1933 Delage D8S
Sold for: $3,740,000By: RM AuctionsWhen: Aug. 17, 2007Where: Monterey, Calif.This French car has a one-of-a-kind body. The car was presented at the Salon de Paris, the Paris auto show, in 1933, according to RM Auctions. The car could go from 0 to 60 mph in 15 seconds, which was faster than a supercharged Bentley of the era, the auction house said. Sports Car Market called it a "spectacular car with known ownership since new," which adds greatly to the value.

1935 Duesenberg SJ
Sold for: $4,400,000By: RM AuctionsWhen: Aug. 17, 2007Where: Monterey, Calif.This over-the-top car was a "Doozy for a Floozy"—at least, she played one in the movies. This Duesenberg was supposed to have been designed for Mae West, but she never took delivery. According to RM Auctions, this was one of only 36 cars supercharged by the factory. The passenger compartment is finished in an Art Deco design with burgundy upholstery.

1931 Bentley 4-Liter
Sold for: $4,510,000By: Gooding & Co.When: Aug. 18, 2007Where: Pebble Beach, Calif.This rare find is one out of only 43 remaining examples, out of 50 units of the so-called "Green Hornet," according to Gooding & Co. It sold for just over $4.5 million last summer, despite what Sports Car Market described as a "leaky engine, ripped seat, faded paint, and ratty top." However, such authentic touches in a rare model make it even more desirable than inauthentic restoration.

1966 Shelby Cobra
Sold for: $5.5 millionBy: Barrett-JacksonWhen: Jan. 18, 2007Where: Scottsdale, Ariz.This Shelby Cobra has a supercharged V8 that produces 800 hp, according to Barrett-Jackson. It was originally configured as a competition car, and then retrofitted as a street-legal car. At one point it was used by Carroll Shelby himself, according to the auction house. Sports Car Market said Bill Cosby once owned a similar car, in which a later owner was killed. Sports Car Market called the sale "a crazy price for a crazy car."

1953 Ferrari 340/375 MM
Sold for: $5.7 millionBy: RM AuctionsWhen: May 20, 2007Where: Maranello, ItalyThis Ferrari racer is about as rare as they get. It is one of only two surviving models of its exact type, out of only three ever built, according to RM Auctions. It is restored to look as it did when it was driven in the Carrera Panamericana road race in Mexico. In May, it fetched $1.5 million above the highest pre-auction estimated price, thanks to what Sports Car Market called "potent provenance, rarity, 5-liter V12 power, stunning on-the-button condition, and great beauty."

1962 Ferrari 330 TRI/LM
Sold for: $9.3 millionBy: RM AuctionsWhen: May 20, 2007Where: Maranello, ItalyThis well-traveled V12 race car was the 1962 Le Mans winner, driven by the legendary Phil Hill and the late Olivier Gendebien. It raced on other circuits like Bridgehampton and Sebring, and crashed at Le Mans in 1963. Believe it or not, it was a daily driver in New York City from 1965 to 1974, according to RM Auctions. Sports Car Market called it "one of most important Ferraris ever to cross the auction block." Ironically, it was offered for $8 million in 2005 and didn't sell.

Think the $1.4 million Bugatti Veyron is the world's most expensive car? Here's a list of 15 cars that sold this year for $2.8 million to $9.3 million each