The 1937 Bugatti Type 57 S Atlantic Coupe is one of a batch of rare French sports coupe automobiles built in 1937 by the Bugatti company. It is considered one of the most bizarre, elusive and expensive of the Bugatti Type 57 SC Atlantics. It included a V-shaped dip at the bottom of the radiator and mesh grilles on either side of the engine compartment. With its low stance, powerful engine, lightweight construction, 123 mph (200 kph) top speed, and influential teardrop body, many believe this is the ultimate Bugatti and the first supercar ever made.

The "S" stood for "surbaissé" ("lowered"). Lowering the car was a major undertaking. The rear axle passed through the rear frame rather than riding under it, and a dry-sump lubrication system was required to fit the engine under the new low hood. The 57 S had a nearly independent suspension in front.

Its design was marked by the concept of incorporating electron, an alloy of magnesium and aluminum from IG Farben of Germany. Although it is strong, and up to one-third the weight of aluminum, it is highly flammable -- thus welding was not possible. This meant that each panel had to be riveted into place, posing a challenging problem for traditional design.

Only 43 Bugatti Type 57 S Atlantic Coupes were produced in 1937. It is speculated that this rare sports car could command more than $6 million at auction.

• Wheelbase, inches: 117.3
• Weight, lbs: 2,100
• Length, inches: 159
• Production: 3
• Current Value: $4.4 million

• Displacement: 3257 cc / 198.8 in³
• Fuel system: Stromberg UUR-2 Carburetor
• Compression ratio: 8.5:1
• Horsepower @ rpm: 210 hp @ 5500 rpm
• Transmission: 4-Speed Manual

• Top Speed, mph: 123 mph
• 0-60 mph, sec: 10 seconds