Alvis Crested Eagle

Common to all cars is a water-cooled six-cylinder in-line engine with overhead valves; it was installed behind the front axle on a chassis frame driving a rigid rear axle suspended on semi-elliptical longitudinal leaf springs. Common to all vehicles and advanced for the time is the use of a front independent wheel suspension with a semi-elliptical transverse leaf spring, which Alvis introduced in parallel in 1933 for the Crested Eagle and Speed 20 SB models. All variants have a uniform track width of 1422 mm, as introduced in 1932 with the Speed 20 SA and later also used in the Speed 25, Alvis 4.3 litre and the Silver Crest models.^[1]

All Crested Eagle models were available from the factory in two versions, as a four-door saloon (primarily for the self-driving owner) or as a limousine (primarily for chauffeur service). These had six side windows. The latter usually has a longer wheelbase of 3353 mm, the former mostly a shorter one of 3124 mm.^[1]

As was customary in the company, Alvis had all bodies manufactured externally, the "saloons" regularly at the coachbuilder Charlesworth Bodies, the "limousines" at Mayfair Carriage Co. In addition, customers could also purchase their Crested Eagle as a pure rolling chassis with all drive components, but without body and interior fittings, in order to have it individually clad by a body builder of their choice. Special bodies from at least eleven different coachbuilders are known, including four-seater tourers from REAL (R. E. Alltman Ltd.), two-door convertibles from Vanden Plas, Cross & Ellis, Carlton and Charlesworth, and other one-offs from Martin & King, Samuel Holbrook Ltd., Salmons and Son and Mayfair.^[1]