In relation to motorsport,Group T4 is a set of technical specifications for modified production cross-countryside-by-side vehicles used inoff-roadCross-Country Rallying (also called Rally Raid). The group is governed by theFédération Internationale de l'Automobile (FIA) and defined in appendix J, article 286a of itsInternational Sporting Code.[1] The vehicles are modified for competition purposes from vehicles manufactured in numbers greater than 250 in a 12 month period. They must beroad legal, but typically differ from the 'cars' defined inGroup T1 andGroup T2 by a much lower minimum weight (900 kg) and no requirement for parts such as a windscreen or windows. The vehicles must be powered by one engine and without driving aids such astraction control orABS. Though the vehicles do not need to behomologated, a reference vehicle needs to be provided to the FIA for approval.[2]
Group T4 was first introduced in 1990 when the generic Group T, introduced the year before, was divided into four specific categories. At first, T4 was for cross-country trucks with no provision made for the modern "lightweight vehicle" until 2019 when two categories ofGroup T3 were established.[3] In 2020, T3-Prototypes became Group T3, and T3-Series became the Group T4 of today, with Trucks moved toGroup T5. The side-by-side T4 vehicles have been competing in FIA Baja Cross Country Rallies, Rally Raids and Marathon Rallies since then, including in theFIA World Cup for Cross Country Rallies.
When competing in theFIA World Rally-Raid Championship there are no sporting classes within the group.[4] However, the long-establishedDakar Rally introduced these for the 2025 event with SSV1, SSV2, and T4.[5] Vehicles complying with the 2021 ASO regulations are eligible, although the 2022 ASO regulations refer to the FIA regulations signifying the FIA's authority.
T4 vehicle are also eligible to compete in theFIA African Rally Championship andMiddle East Rally Championship rallies in a class of their own.[6] No other Group T cross-country vehicles are allowed.
Group T4 vehicles approved by the FIA as of June 2021 include:[2]