Group Rally4

In the motorsport discipline of rallying, Group Rally4 is a formula of rally car specifications determined by the FIA for use in its international competitions: World Rally Championship (WRC) and regional championships. National rallying competitions also allow Group Rally4 cars to compete. There are two technical subclasses of Group Rally4 however these do not affect competitive eligibility. 'Rally4' may be used alone with the same definition. The group was launched in 2019 after the introduction of the Rally Pyramid initiative to reorganise the classes of car and championships in international rallying was approved in June 2018.[1]

Group Rally4
Motor racing formula
CategoryRallying
Country/RegionInternational
ChampionshipsWRC, Regional, National
Inaugural2019 (2008 as R2)
StatusActive
DrivetrainTwo Wheel Drive
Power to weight5.1kg/hp
AptitudePerformance
GRR Co-efficient0.4
Peugeot 208 Rally4, 2021 Barum Czech Rally Zlín - László

The formula for Group Rally4 cars was taken from R2 class of Group R and tweaked with the defining ruleset interchanging the terms, this meant that any existing R2 car homologated or approved since their introduction in 2008 could continue to be used in Rally4 level competition.[2] However, R2 cars homologated prior to 2019 were not required to have a turbo restrictor fitted and remain exempt. Those of R2B class cars also retain the minimum weight of 1030 kg and must use 6.5"x16" on asphalt rallies.

Definition

Group Rally4 cars are defined in FIA document Appendix J - Article 260 as Touring Cars or Large Scale Series Production Cars, supercharged Petrol engine (including rotary engines), 2-wheel drive (front or rear wheel drive)). A production touring car with at least 2500 identical units manufactured must be homologated in Group A, with all the components and changes that make it a Group Rally4 car homologated in an extension.[2] They have a power to weight ratio of 5.1kg/hp.[1]

Key Specific Regulations for Cars in Group Rally4[2]
Class (Group R

legacy class)

 Drivetrain Minimum

Weight

 Engine

Capacity

 Aspiration Fuel Maximum

Cylinders

 Turbo

Restrictor

 Wheels

Gravel

 Wheels

Asphalt

 Production

Requirement

Ra4B R2B 2WD 1080 kg 1390-1600cc Normal Petrol 6 30mm 6"x15" 6.5"x16"

or

7"x17"

 2500
927-1067cc Turbo
Ra4C R2C 1600-2000cc Normal 7"x17"
1067-1333cc Turbo

FIA Competition

Rally4 cars are placed in FIA 'RC4' sporting class alongside R3 and Group A cars.[3] They are eligible for the open drivers' and co-drivers' championships of WRC and all the regional open championships as well as the following:

  • ERC3 and ERC junior
  • ERT2 and ERT Junior
  • ARC3 and ARC Junior
  • MERC3 and MERC Junior
  • APRC3 and APRC Junior
  • Codasur RC4

They are also the sole formula car permitted in the Junior World Rally Championship until 2021.

In new Global Rally Rankings for drivers and co-drivers being introduced in 2022, Rally4 cars have a Group Co-efficient of 0.4.[4]

Cars
Manufacturer Car Debut Homologation Basis Image
Ford Fiesta Rally4[5] 2019 FIA - A5775
Fiesta ST-Line (Fiesta Mk7)
999cc Turbo
Ford Fiesta R2T 2015 FIA - A5762
Fiesta 1.0 Ecoboost 140 PS (Fiesta Mk7)
999cc Turbo
Ford Fiesta R2 2012 FIA - A5729
Fiesta 1.6 (Fiesta Mk6)
1597cc Normal
Opel Corsa Rally4[6] 2021 FIA - A5781
Opel Corsa GS Line 130
1204cc Turbo
Opel Adam R2 2014 FIA - A5752
Adam Slam 3-Door Hatchback
1398cc Normal
Peugeot 208 Rally4[7] 2020 FIA - A5780
208 GT Line 130
1204cc Turbo
Peugeot 208 R2 2012 FIA - A5743
208 VTI 125 3 Portes
1598cc Normal
Renault Clio Rally4[8] 2021 FIA - A5779
Clio R.S. Line TCE 1.3EDC
1331cc Turbo
Renault Twingo R2 2010 FIA - A5731
Twingo "Renault Sport"
1598cc Normal
Škoda Fabia R2 2011 FIA - A5737
Fabia 1.6 16v
1598cc Normal
Source: FIA Homologation List 2021[9]

See Also

References
  1. "FIA Rally Car Pyramid Brochure February 2021" (PDF).
  2. "Specific Regulations for Cars in Group Rally5/Rally4/Rally3" (PDF).
  3. "FIA Regional Rally Sporting Regulations 2021" (PDF).
  4. "FIA Global Rally Ranking Regulations" (PDF).
  5. "FIESTA RALLY4". M-Sport. Retrieved 2020-12-12.
  6. "Opel Corsa Rally4 on the Start Line | Media OPEL International". int-media.opel.com. Retrieved 2020-12-12.
  7. "PEUGEOT 208 Rally 4… Time for action! | Media Peugeot Sport". media.peugeot-sport.com. Retrieved 2020-12-12.
  8. "Clio Trophy France - Communiqués de presse - Clio Rally4, née pour gagner - renaultsport.com". Renault Sport (in French). Retrieved 2021-01-18.
  9. "FIA Homologation List 2021" (PDF).
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