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Thread: Daimler Regina (DF400 & DK400) 1954-1959

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    Daimler Regina (DF400 & DK400) 1954-1959

    The Daimler DK400, originally Daimler Regina DF400, was a large luxury car made by The Daimler Company Limited between 1954 and 1959 replacing their Straight-Eight cars. Distinguished, after the Regina, by its hooded headlights it was Daimler's last car to use their fluid flywheel transmission.

    Limousine

    The Regina, DF400 and DK400 chassis was generally equipped with steel limousine bodywork by Carbodies (identified as DK400B) with a drop division, three occasional seats and more luxurious trim in the rear compartment than in the DK400A owner-driver car.

    The Regina limousine was shown at the Earls Court Show in October 1954 and then described as being built on a special edition of the Regency chassis. Some chassis were bodied as hearses and at least one was equipped with a coupé body for Lady Docker.

    An unusual feature of the limousine was that the occasional middle seats were three abreast.

    Final big straight-six engine, move to a new price class

    The DK400 was the last of the larger of the old long-stroke straight six engines that had been traditional on Daimler's smaller cars since 1910 though production of the smaller 3.8-litre engine, modified to take Borg-Warner's automatic transmission, continued until 1962.

    When introduced in 1954 the engine's output was 127 horsepower (95 kW) at 3,600 rpm. In the autumn of 1955 the outputs of both the 3½-litre and 4½-litre engines were substantially increased, the 4½-litre to 167 horsepower (125 kW) at 3,000 rpm. The standard wheelbase versions were re-designated DF402. The long wheelbase limousine remained designated DK400 but its name, Regina, was dropped as was the price of the complete standard-bodied limousine, by more than one-third. Modifications to the limousine's engine led to a similar output of 167 hp but at 3,800 rpm.

    Final fluid flywheel transmission

    The DK400 was the last new Daimler model to use the company's preselector gearbox with fluid flywheel transmission introduced in 1930. A major change in gearing, however, saw the direct-drive top gear replaced by a direct-drive third and an overdrive top. This, intended to improve the car's ability to cruise at high speed with its large engine, could lead to failure because the transmission could not always cope with the torque available from an engine capable of producing 167 horsepower (125 kW) at 3,000 rpm.

    It was replaced in the Majestic by a more modern Borg-Warner fully automatic transmission which required modification of the engine and crankcase castings.

    Royalty

    Despite its status as royal transport, the DK400 was as much as 500 kilograms (1,100 lb) lighter than previous postwar Daimler limousines. A number were used by the Queen Mother and others of the UK Royal Family, for which the last-ever Hooper bodies were provided including an open-top landaulette.

    Source: wikipedia.org
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