Editing Aston Martin (section)

=== 1918–1939: Interwar years ===
[[File:1923 Aston Martin Razor Blade team car in Morges 2013 - AM logo and radiator calormeter closeup.jpg|thumb|1923 Razor Blade Team car]]
[[File:1924 Aston Martin sidevalve tourer - fvl (4668551949).jpg|thumb|1924 tourer]]
[[File:1937 Aston Martin Kop Hill Climb 2010 5029332450.jpg|thumb|1937 2-Litre open 2/4-seater Speed model, Kop Hill 2010]]
After the war they found new premises at Abingdon Road, Kensington and designed a new car. Bamford left in 1920 and Bamford & Martin was revitalised with funding from [[Louis Zborowski]]. In 1922, Bamford & Martin produced cars to compete in the [[French Grand Prix]], which went on to set world speed and endurance records at [[Brooklands]]. Three works Team Cars with 16-valve twin cam engines were built for racing and record-breaking: chassis number 1914, later developed as the Green Pea; chassis number 1915, the [[Razor Blade]] record car; and chassis number 1916, later developed as the [[Halford Special]].<ref>The AM Halford Special, The First Five Years, AM Quarterly, Volume 19 Number 77, Summer 1981.</ref>

Approximately 55 cars were built for sale in two configurations; long chassis and short chassis. Bamford & Martin went bankrupt in 1924 and was bought by [[Godfrey Benson, 1st Baron Charnwood#Family|Dorothea, Lady Charnwood]], who put her son John Benson on the board. Bamford & Martin got into financial difficulty again in 1925 and Martin was forced to sell the company (Bamford had already left it in 1920).<ref>{{cite book |url=https://books.google.com/books?id=zonQCwAAQBAJ&q=Aston+Martin+Bankrupt+1926&pg=PT718 |title=The Singer Story |first=Kevin |last=Atkinson |publisher=Veloce Publishing |year=2007 |isbn=978-1874105527}}</ref>

Later that year, Bill Renwick, [[A C Bertelli|Augustus (Bert) Bertelli]] and investors including Lady Charnwood took control of the business. They renamed it Aston Martin Motors and moved it to the former [[General Aircraft Limited#History|Whitehead Aircraft Limited]] [[Hanworth]] works in [[Feltham]]. Renwick and Bertelli had been in partnership some years and had developed an overhead-cam four-cylinder engine using Renwick's patented combustion chamber design, which they had tested in an [[Enfield-Allday]] chassis. The only "Renwick and Bertelli" motor car made, it was known as "Buzzbox" and still survives.<ref name=bertelli>{{cite web |url=http://www.ecuriebertelli.com/amhto1932.html |title=Pre-war Aston Martin, Birth to 1932 |publisher=Ecurie Bertelli |access-date=6 December 2018}}</ref>

The pair had planned to sell their engine to motor manufacturers, but having heard that Aston Martin was no longer in production realised they could capitalise on its reputation to jump-start the production of a completely new car.<ref name=bertelli/>

Between 1926 and 1937 Bertelli was both technical director and designer of all new Aston Martins, since known as "Bertelli cars". They included the 1½-litre "T-type", "International", "Le Mans", "MKII" and its racing derivative, the "Ulster", and the 2-litre 15/98 and its racing derivative, the "Speed Model". Most were open two-seater sports cars bodied by Bert Bertelli's brother [[commons:Category:Bertelli coachwork|Enrico (Harry)]], with a small number of long-chassis four-seater tourers, dropheads and saloons also produced.<ref name=bertelli/>

Bertelli was a competent driver keen to race his cars, one of few owner/manufacturer/drivers. The "LM" team cars were very successful in national and international motor racing including at Le Mans.<ref name=bertelli/>

Financial problems reappeared in 1932. Aston Martin was rescued for a year by [[Aston Martin Owners Club|Lance Prideaux Brune]] before passing it on to [[Arthur Sutherland|Sir Arthur Sutherland]]. In 1936, Aston Martin decided to concentrate on road cars, producing just 700 until [[World War II]] halted work. Production shifted to aircraft components during the war.<ref>{{Cite news|url=https://www.osv.ltd.uk/brief-history-of-aston-martin/|title=A Brief History of Aston Martin {{!}} OSV {{!}} Learning Centre|date=10 November 2017|work=OSV|access-date=9 September 2018}}</ref><ref>{{Cite news|url=https://astrumpeople.com/lionel-martin-biography-a-great-history-of-aston-martin-cars/|title=Lionel Martin Biography: A Great History of Aston Martin Cars|work=Astrum People|access-date=9 September 2018}}</ref>