Editing Cosworth (section)

===Other road engines===
Best known in Europe for its relationship with Ford<ref name=Cosworth.com/> – in particular because of the Cosworth name in the vehicle title on the high-performance [[Ford Sierra RS Cosworth]] and [[Ford Escort RS Cosworth]],<ref name=Cosworth.com/> but also in the creation of other Ford models; the [[Ford Escort RS1600|Escort RS1600]], [[Ford Escort RS1800|Escort RS1800]], [[Ford RS200|RS200]], and [[Ford Scorpio|Scorpio 2.9i 24V]].

[[File:76 Cosworth Vega.jpg|thumb|left|1976 Chevrolet Cosworth Vega]]
[[File:1976 Cosworth Vega -2673.jpg|thumb|right|Cosworth Vega 122&nbsp;cu&nbsp;in DOHC L4-110&nbsp;hp]]
In the US, the name has also appeared in the title of a road car (well before it did in Europe) as the Cosworth version of the [[Chevrolet Cosworth Vega|Chevrolet Vega]]. Only 3,508 1975 and 1976 Cosworth Vegas were produced from March 1975 through 1976. The engine features the Vega sleeveless, aluminium-alloy block fitted with forged components. The twin-cam, 16-valve, aluminium cylinder head design was assisted by Cosworth, but [[Chevrolet]] did the development work. The engine features [[electronic ignition]], [[Bendix Corporation|Bendix]] [[electronic fuel injection#Electronic|electronic fuel injection]], and stainless steel headers.<ref>1975 Chevrolet Cosworth Vega Shop manual supplement-engine description</ref> The final US [[emissions standard]]ised version produces 110&nbsp;bhp. Cosworth's '''EA''' racing version was not successful due to engine block structural failures. Chevrolet later produced a heavy-duty 'off-road' block with thicker walls to better withstand the racing application, but by that time Cosworth had moved on. Projected first year sales of the Cosworth Vega had been 5,000. With only 3,508 cars produced and many unsold, the car was discontinued. 1,500 hand-built Cosworth Vega engines were simply scrapped for lack of demand.<ref>Collectable Automobile-April 2000. Chevrolet's Vega</ref>

Other published projects for [[Adam Opel AG]] include the [[Opel Ascona|Opel Ascona 400]] / [[Opel Manta|Manta 400]] rally cars and the 2.0L 16V engines in the [[Opel Kadett]], [[Opel Astra]] GSi, [[Opel Vectra]] and [[Opel Calibra]] turbo.{{Citation needed|date=July 2009}}

Other companies known to have benefitted from the Cosworth engineering input are [[Mercedes-Benz]] (with the 190 E 2.3-16) and [[Audi]] (notably their [[Audi S and RS models|RS cars]]).

Cosworth's involvement with [[Mercedes-Benz]] came with moves in the mid-1980s from the German manufacturer to re-enter motorsport after retiring from direct factory participation after the [[1955 Le Mans disaster|1955 Le Mans crash]] which killed 80 spectators. Mercedes-Benz was looking to create a [[Group B]] rally car out of its new [[Mercedes-Benz W201|W201 Chassis]] (190E Model) and turned to the expertise of Cosworth to shorten the development time for this project.{{Citation needed|date=July 2009}}
[[File:2.3-16 Race Car.JPG|thumb|right|2.3-16 Targa Car]]
The request was a huge surprise for Cosworth, and the original brief for a 320&nbsp;bhp engine based on the 136&nbsp;bhp Mercedes M102 2.3-litre SOHC 4-cylinder engine was duly passed to Mike Hall, who "drew the famed DFV and BDA engine".<ref name="ReferenceA">"Flying the Flag", Autocar 7 August 1985, pp32-33</ref> Designed around the existing M102 head bolt pattern, the new twin cam, 16-valve, pentroof head, had its valves set at 45° included angle, rather than the 40° angle of the [[#BDA|BDA]].<ref name="ReferenceA" /> The valves were the biggest that could be fitted into the combustion chamber. Flat top pistons delivered the 10.5:1 compression ratio. The new Cosworth '''WAA'''<ref>{{cite web |url=http://www.cosworthvega.com/the_cosworth_story.html |title=The Cosworth Story |publisher=Cosworthvega.com |access-date=12 July 2010 |archive-url=https://web.archive.org/web/20090518004707/http://www.cosworthvega.com/the_cosworth_story.html |archive-date=18 May 2009 |url-status=dead |df=dmy-all }}</ref> engine also was Cosworth's first one-piece head, i.e. the camshaft carrier was cast integral with the head itself. Again the constraints of the existing head-bolt pattern meant that Hall had to shift the camshaft bearings from outside each pair of cam lobes as in the BDA to in between each cylinder's pair of cam lobes. The upside being that this configuration made for less flex at high rpm.<ref name="ReferenceA"/>

The advent of the AWD turbo [[Audi Quattro]] gave the rear-wheel-drive, normally aspirated 190E rally car no chance of being successful and the competition car was stillborn. Instead Mercedes-Benz decided to recoup its development cost by selling the car as a road going sports-sedan. Hall detuned the WAA race engine to 185&nbsp;bhp by reducing the port diameters and a more restrictive fuel injection and induction was substituted for the race items to complete the detune.<ref name="ReferenceA" /> All WAA 2.3-16 engines were built in the Cosworth factory with the heads being produced by the Coscast method.

Cosworth assisted with the later 2.5-16 engine ('''WAB'''), and the short-stroke 2.5-16 Evo engines ('''WAC''') although these were all manufactured in house by Mercedes-Benz.{{Citation needed|date=July 2009}} The 190E 2.3-16 became the basis for privateer Mercedes entries into the DTM from 1988. The short-stroke 2.5-16 190E EVO II was race-developed to 375+ bhp, gaining the 1992 DTM crown with [[Klaus Ludwig]] at the wheel.

A {{convert|4300|cc|1|abbr=on}} V10 designated '''WDA''' was also built and tested in a Volvo S80 in 1997, but this did not see production.

In 2020, Gordon Murray Automotive commissioned Cosworth to design and build a {{convert|3994|cc|1|abbr=on}} V12 for use in their new [[Gordon Murray T.50|T.50]] sports car; which produces {{convert|663|PS|kW hp|0|abbr=on}} at 11,500&nbsp;rpm, and {{convert|467|Nm|0|abbr=on}} of torque at 9,000&nbsp;rpm.

Cosworth was chosen by [[Bugatti Automobiles|Bugatti]] to develop a [[V16 engine]] as part of the [[hybrid vehicle drivetrain|hybrid powertrain]] for the upcoming [[Bugatti Tourbillon]]. The engine is reported to produce 1,000 PS (735 kW; 986 hp) and 900 N⋅m (664 lb⋅ft).<ref>{{cite web |title=Bugatti Tourbillon |url=https://tourbillon.bugatti.com/ |website=Bugatti |access-date=21 June 2024}}</ref>