▁lit re ▁D FL ▁became ▁the ▁most ▁used ▁engine ▁of ▁the ▁C 2 ▁class , ▁ach ieving ▁four ▁class ▁champion ships , ▁five ▁class ▁wins ▁at ▁Le ▁Mans ▁between ▁ 1 9 8 5 ▁and ▁ 1 9 9 0 , ▁and ▁the ▁best ▁distance ▁of ▁any ▁Cos worth ▁engine ▁at ▁Le ▁Mans , ▁ 3 5 1 ▁la ps , ▁in ▁ 1 9 8 8 . ▁ ▁R eli ability ▁of ▁the ▁C 2 ▁class ▁was ▁still ▁considered ▁uns atisf actory , ▁however , ▁and ▁as ▁the ▁ 1 9 8 0 s ▁ended ▁the ▁issue ▁led ▁the ▁FI A ▁to ▁seek ▁a ▁new ▁formula ▁to ▁replace ▁the ▁C 2 ▁class . ▁▁ 1 9 8 9 ▁saw ▁the ▁introduction ▁of ▁the ▁ 3 . 5 ▁lit re ▁D F Z ▁variant ▁as ▁a ▁C 1 ▁class ▁engine . ▁ ▁It ▁had ▁the ▁honor ▁of ▁being ▁the ▁first ▁Cos worth ▁engine ▁to ▁finish ▁ahead ▁of ▁the ▁C 2 ▁winner ▁at ▁Le ▁Mans , ▁but ▁it ▁was ▁an ▁incons istent ▁finish er ▁and ▁not ▁compet itive ▁within ▁the ▁C 1 ▁class . ▁ ▁It ▁proved ▁a ▁consistent ▁finish er ▁and ▁winner ▁in ▁the ▁FI A ▁Cup ▁class , ▁the ▁low ▁power ed ▁replacement ▁of ▁the ▁C 2 ▁class , ▁in ▁ 1 9 9 2 . ▁ ▁The ▁ 3 . 5 ▁lit re ▁D FR ▁variant ▁yield ed ▁more ▁consistent ▁results ▁as ▁a ▁C 1 ▁engine ▁for ▁the ▁Sp ice ▁team ▁in ▁ 1 9 9 0 ▁and ▁the ▁Euro ▁Racing