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Daimler Double-Six piston engine was a sleeve-valve V12 engine manufactured by The Daimler Company Limited of Coventry, England between 1926 and 1938 in four different sizes for their flagship cars. ==The colossus of roads== Daimler required an advanced new model to compete with Rolls-Royce's New Phantom of 1925. Though Packard had introduced its Twin-Six many years earlier it was to be a decade or more before luxury manufacturers like Rolls-Royce, Hispano-Suiza, Lincoln, Voisin and Lagonda made their own (and Packard returned to it). In fact by the mid-1930s flexible engine mountings and improved carburation had made so many cylinders unnecessary. What did return them to a certain level of popularity was the push for higher performance requiring higher crankshaft speeds. Daimler introduced their first 26 hp straight-eight in mid-1934 and their last (poppet valve) V12s were built in 1937 or 1938. From 1929 Daimler Double-Sixes were distinguishable from the six-cylinder cars by a chromium bar down the centre of the radiator. A similar distinguishing mark was placed on the later Jaguar-made versions. Aside from Daimler only Voisin in France ever attempted production of a sleeve-valve V12 engine. Voisin's production—between 1929 and 1937—was "minimal and spasmodic". The same Daimler Double-Six name was used for the badge-engineered ''Daimler'' V12 engine used in the largest Daimlers between 1972 and 1997. Lofty England,〔F R W England and J Mercer drove a Double-Six to second place (to a 15/18 Lanchester) in the 1932 ''RAC Rally'' 〕 a Daimler apprentice 1927–1932, joined Jaguar in 1946 and became its chief executive. He ensured the Double-Six name was used for the Jaguar V12 when installed in Daimler cars.〔Jonathan Wood, Obituaries: LOFTY ENGLAND ''The Independent'' Friday, 9 June 1995〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Daimler Double-Six sleeve-valve V12」の詳細全文を読む スポンサード リンク
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