Phaeton body almost any vehicle with two axles and a row or rows of seats across the body could be called a phaeton. Convertibles and pillarless hardtops were marketed as "phaetons" after actual phaetons were phased out. The term "phaeton" had historically described a light, open four-wheeled carriage. When automobiles arrived it was applied to a light two-seater with minimal coachwork. The term was interchangeable with "spyder", derived from a light form of phaeton carriage known as a "spider". Originally meant to denote a faster and lighter vehicle than a touring car, the two terms eventually became interchangeable. A detachable folding or
Volkswagen Phaeton of whilst maintaining the interior temperature at . Piëch requested this even though the Phaeton's top speed was electronically limited to . Another requirement was that the car should possess torsional rigidity of 37,000 N·m/degree. At the 1999 International Motor Show Germany, Volkswagen presented the Concept D, which was essentially a hatchback prototype of the Phaeton, with very similar design, V10 TDI engine, air suspension and all wheel drive. The Phaeton's platform, the Volkswagen Group D1 platform, was shared with the Bentley Continental GT and Bentley Continental Flying Spur. Certain systems, such as the automatic transmission and some engines, are