Editing Multi-valve (section)

=== Before 1914 ===
The 1908 Ariès VT race cars had 1.4 litre supercharged single cylinder engines with four valve per cylinder desmodromic systems. (Source: [https://www.desmodromology.nl/aries-2/ <nowiki>[1]</nowiki>])

The 1910 Isotta-Fraschini Tipo KM had a 10.6 litre inline 4 with single overhead camshaft and four valves per cylinder and it had one of the first engines with fully enclosed overhead valve gear (source: [[Isotta Fraschini Tipo KM]] [https://www.bonhams.com/auctions/16133/lot/316/] and [https://images2.bonhams.com/image?src=Images/live/2008-04/07/7637601-1-23.jpg&width=960])

The first motorcar in the world to have an engine with two overhead camshafts and four valves per cylinder was the 1912 [[Peugeot]] L76 Grand Prix race car designed by [[Ernest Henry (engineer)|Ernest Henry]]. Its 7.6-litre monobloc straight-4 with modern hemispherical combustion chambers produced {{cvt|148|bhp|kW}} (19.5 HP/Liter(0.32&nbsp;bhp per cubic inch)). In April 1913, on the Brooklands racetrack in England, a specially built L76 called ''"la Torpille"'' (torpedo) beat the world speed record of 170&nbsp;km/h.<ref name="KevinClemensDOHC" /> Robert Peugeot also commissioned the young [[Ettore Bugatti]] to develop a GP racing car for the 1912 Grand Prix. This chain-driven [[Bugatti Type 18]] had a 5-litre straight-4 with SOHC and three valves per cylinder (two inlet, one exhaust). It produced appr. {{convert|100|bhp|kW PS|0|abbr=on}} at 2800 rpm (0.30&nbsp;bhp per cubic inch) and could reach {{convert|99|mi/h|km/h|abbr=on}}. The three-valve head would later be used for some of Bugatti's most famous cars, including the 1922 Type 29 Grand Prix racer and the legendary [[Bugatti Type 35|Type 35]] of 1924. Both Type 29 and Type 35 had a {{cvt|100|bhp|kW}} 2-liter SOHC 24-valve NA straight-8 that produced {{cvt|0.82|bhp|kW}} per cubic inch.