Rịba ama amaokwu a dị n'okpuru ma zaa ajụjụ ahụ mgbe e mesịrị n'otu asụsụ ahụ dị ka amaokwu ahụ:  Passage: Mgbe agha ahụ gasịrị ha chọtara ụlọ ọhụrụ na Abingdon Road, Kensington ma mepụta ụgbọ ala ọhụrụ. Bamford hapụrụ na 1920 na Bamford & Martin ka e mere ka ọ dịghachi ndụ site na ego sitere na Count Louis Zborowski. N'afọ 1922, Bamford & Martin rụpụtara ụgbọala ndị a ga-agba na asọmpi French Grand Prix, nke gara n'ihu setịpụ ihe ndekọ ọsọ ụwa na ntachi obi na Brooklands. E wuru ụgbọ ala atọ nke nwere 16-valve twin cam engines maka ịgba ọsọ na ndekọ: nọmba chassis 1914, emesịrị mepụta dị ka Green Pea; nọmba chassis 1915, ụgbọ ala ndekọ Razor Blade; na nọmba chassis 1916, emesịrị mepụta dị ka Halford Special. Ihe dị ka ụgbọ ala 55 ka e wuru maka ire ere na nhazi abụọ; ogologo chassis na obere chassis. Bamford & Martin gbara akwụkwọ na 1924 ma Dorothea, Lady Charnwood zụtara ya, onye tinyere nwa ya nwoke John Benson na bọọdụ. Bamford & Martin nwetara nsogbu ego ọzọ na 1925 ma a manyere Martin ịre ụlọ ọrụ ahụ (Bamford ahapụlarị).N'afọ ahụ, Bill Renwick, Augustus (Bert) Bertelli na ndị na-etinye ego gụnyere Lady Charnwood weghaara azụmahịa ahụ. Ha kpọrọ ya Aston Martin Motors ma kwaga ya n'ụlọ ọrụ mbụ nke Whitehead Aircraft Limited Hanworth na Feltham. Renwick na Bertelli anọwo na mmekorita ruo afọ ole na ole ma mepụta igwe anọ nwere igwe anọ nwere igwe anọ na-eji usoro ụlọ ọkụ nke Renwick mepụtara, nke ha nwalere na Enfield-Allday chassis. Naanị ụgbọ ala "Renwick na Bertelli" mere, a maara ya dị ka "Buzzbox" ma ka dị ndụ. Abụọ ahụ zubere ịre ndị na-emepụta ụgbọ ala ha, mana mgbe ha nụrụ na Aston Martin anaghịzi arụ ọrụ, ha ghọtara na ha nwere ike iji aha ya mee ihe iji malite ịmalite mmepụta ụgbọ ala ọhụrụ. N'agbata 1926 na 1937 Bertelli bụ ma onye nduzi na onye mmebe nke Aston Martins ọhụrụ niile, ebe a maara dị ka "ụgbọ ala Bertelli". Ha gụnyere 11⁄2-liter "T-ụdị", "International", "Le Mans", "MKII" na agbụrụ agbụrụ ya, "Ulster", na 2-liter 15/98 na agbụrụ agbụrụ ya, "Speed Model"....  Ajụjụ: Olee ụgbọala ndị Renwick na Bertelli ji nwalee injin ha nwere cylinder anọ?
Enfield-Allday chassis