Cubitt16/20 HP — Original High-Chassis Series

Cubitt's original production family, publicly specified before Cubitts’ Engineering Company Limited was incorporated and reported underway at Aylesbury by September 1919. The long-stroke four had all valves enclosed along one side: contemporary evidence therefore establishes an L-head/side-valve engine from the start and contradicts later claims that early Cubitts were overhead-valve. Its 126-inch/3,200 mm-wheelbase chassis combined four forward speeds and reverse, an inverted-cone clutch, open propeller shaft and overhead-worm final drive with semi-elliptic front and rear springs, detachable pressed-steel disc wheels, battery-and-coil ignition, electric starting and lighting, and two independent rear-wheel brakes. Early bodies included a streamlined four-seater and open four- or five-seat tourers, with Wright & Wright of Tring responsible for the prototype and some two- and four-seat coachwork before body production moved in-house. The £298 launch price rose to £342 in February 1920 and £442 that June. A period claim of about 25 mpg is preserved as advertising, not a modern test result. This high chassis was materially redesigned late in 1921, so the cantilever-sprung successor receives a separate generation rather than being hidden as a body variant.