Sourced production or model lifecycle range used by the main catalog timeline.
CubittL4
Long-wheelbase counterpart to the final K4, with a 10 ft 7 in/3,226 mm wheelbase, 4.7:1 axle ratio, 32 x 6.20 tyres, £275 chassis price and £500–£525 complete-car range. The specification points to Cubitt's luxury closed coachwork, commonly mapped in retrospective material to saloon, limousine and landaulette forms, but the exact body-to-code allocation is qualified because no complete 1925 factory catalogue has been recovered. Mechanically it shared the four-speed gearbox, revised lower frame and radiator, long semi-elliptic rear springs, aluminium pistons, lighter connecting rods and underslung-worm axle introduced for Cubitt's final season. Its longer chassis, different gearing, tyres and price justify a distinct model row despite the very short production window before compulsory winding up.
Dates with their meaning intact
This record contains useful sourced evidence, but it does not yet meet the reference-ready standard. Still needed: attributed imagery. Fields we cannot source stay empty rather than guessed.
Included in the marque's approximately 3,000 vehicles; no L4-only output total, body split or complete chassis ledger survives.