Editing V12 engine (section)

=== 1910s ===
[[File:1916Packard1-35TownCarLimoKimballEngine.jpg|thumb|right|1916 [[Packard#1906–1930|Packard Twin Six]] engine]]

One of the earliest recorded uses of V12 engines in automobiles was in October 1913, when a custom-built racing car competed at the Brooklands circuit in the United Kingdom. The car was entered by [[Louis Coatalen]], who was chief engineer of the Sunbeam Motor Car Company. It was named 'Toodles V' (after Coatalen's pet name for his wife) and achieved several speed records in 1913 and 1914.<ref name="Ludvigsen"/> The V12 engine had a displacement of {{convert|9.0|L|cuin|0|abbr=on}}, an aluminum crankcase, iron cylinders with L-shaped combustion chambers, a cam-in-block valvetrain and a V-angle of 60 degrees. Each bank of the engine consisted of two-cylinder blocks with three cylinders each. Valve clearance was set by grinding the relevant parts, the engine lacking any easy means of adjustment. This reflected the intention for the engine to be later used in aircraft since any adjustment method that could go wrong in flight was to be avoided. As initially built, the V12 was rated at {{convert|200|bhp|kW|-1|abbr=on|order=flip}} at 2,400 rpm and weighed approximately {{convert|750|lb|kg|0|abbr=on|order=flip}}.

Amongst the first production cars to use a V12 engine were the 1915 [[Packard#1906–1930|Packard Twin Six]],<ref>{{cite web |title=1915 Packard Twin Six |url= https://larzanderson.org/history/the-collection/1915-packard-twin-six/ |website=larzanderson.org |access-date=21 February 2020}}</ref><ref>{{cite web |title=Counting to Twelve: The Packard Twelve and Twin Six |url= https://ateupwithmotor.com/model-histories/packard-twelve-twin-six-history/ |website=ateupwithmotor.com |access-date=21 February 2020 |date=26 June 2010}}</ref> the 1915 ''National'' V12 engine{{Citation needed|date=July 2010}} and the 1917 [[Weidely Motors Company|Weidely Pathfinder]];<ref>{{cite web |title=The Great Pathfinder – "King of the Twelves" |url=http://theoldmotor.com/?p=106867 |website=theoldmotor.com |access-date=21 February 2020 |archive-date=28 January 2020 |archive-url=https://web.archive.org/web/20200128005355/http://theoldmotor.com/?p=106867 |url-status=dead }}</ref> all of which were built in the United States.