Rally4 is a technical specification of rally car determined by the FIA for use in its international competitions: World Rally Championship (WRC) and regional championships. National rallying competitions also allow Rally4 cars to compete. There are two technical subclasses of Rally4 however these do not affect competitive eligibility. 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.
The formula for 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. 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.
In July 2024, the FIA announced slightly modified Rally4 cars will be eligible to race in circuit touring car racing under the name of TC Lite 4 (TCL4) from 2025.
Definition 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 Rally4 car homologated in an extension. They have a power to weight ratio of 5.1kg/hp. +Key Specific Regulations for Cars in Group Rally4Class(Group R legacy class)DrivetrainMinimum WeightEngine CapacityAspirationFuelMaximum CylindersTurbo RestrictorWheels GravelWheels AsphaltProduction RequirementRa4BR2B2WD1080 kg1390-1600ccNormalPetrol630mm6"x15"6.5"x16" or
7"x17"2500927-1067ccTurboRa4CR2C1600-2000ccNormal7"x17"1067-1333ccTurbo
FIA Competition Rally4 cars are placed in FIA 'RC4' sporting class alongside R3 and Group A cars.
+Eligibility in FIA WRC Championships 2023ClassGroupWRCMTWRC2WRC3MastersJuniorRC4Rally4 +Eligibility in FIA Regional Championships 2023ClassGroupALLERCERTARCMERCAPRCNACAMCODASURAbsoluteTeamsERC3ERC4JunJunARC2ARC3ARC4JunMERC2MERC3MERC4JunAPRC3APRC4JunNAC3NAC4JunCOD2COD3COD4RC4Rally4
Cars ManufacturerCarDebutHomologation BasisImage FordFiesta Rally42019FIA - A5775Fiesta ST-Line (Fiesta Mk7)999cc Turbo FordFiesta R2T2015FIA - A5762Fiesta 1.0 Ecoboost 140 PS (Fiesta Mk7)999cc Turbo FordFiesta R22012FIA - A5729Fiesta 1.6 (Fiesta Mk6)1597cc Normal LanciaYpsilon Rally4 HF2025FIA - A5789Lancia Ypsilon1204cc Turbo OpelCorsa Rally42021FIA - A5781Opel Corsa GS Line 1301204cc Turbo OpelAdam R22014FIA - A5752Adam Slam 3-Door Hatchback1398cc Normal Peugeot208 Rally42020FIA - A5780208 GT Line 1301204cc Turbo Peugeot208 R22012FIA - A5743208 VTI 125 3 Portes1598cc Normal RenaultClio Rally42021FIA - A5779Clio R.S. Line TCE 1.3EDC1331cc Turbo RenaultTwingo R22010FIA - A5731Twingo "Renault Sport"1598cc Normal ŠkodaFabia R22011FIA - A5737Fabia 1.6 16v1598cc Normal KiaRio Rally42021FIA - none Built by CRM Motorsport Approved for use in national championships Source: FIA Homologation List 2021
See also Rally Pyramid Groups Rally Rally1 Rally2 Rally3 Rally5
References
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