Editing Chappe et Gessalin (section)

==CG in competition==
While CGs had been raced prior to its release, the lightweight 548 was the first CG built expressly for motor racing.<ref name="racingsports">{{cite web|url=http://www.racingsportscars.com/type/archive/Simca/CG.html|title=Complete Archive of Simca CG|work=www.racingsportscars.com}}</ref>

In April 1969 [[Henri Chemin]] came to Chrysler, rejoining his former boss from Ford France, William Reiber. Chemin was appointed head of the competition department and given three objectives:
# Start winning races, including rallies, as soon as possible
# Rebuild the image of Simca's brand with young drivers
# Add to Matra's already impressive list of victories

Chemin campaigned a 1200XS coupé with the new 1812&nbsp;cc [[Overhead camshaft#Single overhead camshaft|OHC]] [[Simca Type 180]] engine in a series of rallyes, but the car could not overcome the Alpines.<ref name="simca-rallye">{{cite web|url=http://simca.rallye.free.fr/Pilote-de-notoriete/fiorentino/fiorentino.htm|title=BERNARD FIORENTINO|work=www.simca.rallye.fr}}</ref> Towards the end of the year CG agreed to collaborate with the Simca division of Chrysler Europe in a new venture to be called Simca-CG. Simca-CG would go racing with a jointly-developed car to be called the Simca-CG Proto MC.

Although some histories say that the Proto MC's chassis was designed by Matra, there is little concrete evidence for the company's direct involvement. An indirect connection to Matra was established when, through the influence of Simca, Matra engineer Bernard Boyer was assigned to the development team.<ref name="rarefrenchcg"/> Boyer was also a former employee of Chappe et Gessalin and son-in-law of Albert Chappe.

The Simca-CG Proto MC was a mid-engined (MC standing for "Moteur Centrale") two-seater car with a monocoque-and-tubular hybrid chassis. The engine was the Chrysler/Simca Type 180 that had been used in the 1200XS coupés. Early cars made do with the 1812&nbsp;cc engine but later cars would have 2156&nbsp;cc, 2207&nbsp;cc and 2310&nbsp;cc versions of the Type 180 motor. The transaxle came from a Porsche 914.

Bodywork for the first cars was derived from the existing molds for the CG 1200S and 548 models. Later spiders would have as much as {{cvt|200|mm|in|1}} cut from their length, and one car was built with a truncated cabin that gave it the appearance of a small truck.

The project was launched in February 1970, design work was completed by the end of May and the car was built and track testing was starting by the end of July.

Its first race was on August 8, 1970 at Mont-Dore, and the car's first Championship win was at the 1970 Critérium des Cévennes, with Gérard Larrousse driving.<ref name="amicale1"/>

For the 1972 season Simca brought in engine specialists JRD, who increased the displacement and made other modifications to increase the power output and deal with reliability issues arising from the greater stresses.

Over the course of three seasons the MC posted victories in 32 out of 49 races entered.<ref name="automobilerevue"/><ref name="amicale7">{{cite web|url=http://www.amicalecg.fr/spip/spip.php?article14|title=Palmarès|work=www.amicalecg.fr|access-date=2016-12-29|archive-url=https://web.archive.org/web/20140517152926/http://www.amicalecg.fr/spip/spip.php?article14|archive-date=2014-05-17|url-status=dead}}</ref>

Drivers were Bernard Fiorentino, Gérard Larrousse, Michel Saliba and Philippe Renaudât.

In April 1973, Simca Chrysler dissolved the competition department, leaving only Matra Sports to continue in Sports-Prototypes racing.

Many (non-MC) CGs continued to be active in historic racing. Several of these cars were described as "CG 1600s", but these appear to have been custom engine swaps rather than factory originals.

In 2012, with the approval of Jean Gessalin and support from Bernard Chappe, Didier Malga launched "CG Sport", an attempt to revive the brand as a competition group.<ref name="petites-observations">{{cite web|url=http://www.petites-observations-automobile.com/2014/06/9611.html|title=Le pari fou de Didier, redonner vie à la petite marque française CG|work=www.petites-observations-automobile.com}}</ref>