▁The ▁D F Z ▁did ▁not ▁race ▁in ▁Formula ▁One ▁beyond ▁ 1 9 8 8 ▁as ▁the ▁general ▁release ▁of ▁the ▁D FR ▁engine ▁made ▁it ▁ob sole te . ▁ ▁The ▁engine ▁did ▁however ▁have ▁a ▁second ▁brief ▁le ase ▁of ▁life ▁in ▁sport scar ▁racing , ▁when ▁the ▁FI A ▁announced ▁plans ▁to ▁transition ▁towards ▁using ▁ 3 . 5 L ▁F 1 - style ▁engines ▁in ▁Group ▁C ▁in ▁the ▁early ▁ 1 9 9 0 s . ▁In ▁ 1 9 9 0 ▁Sp ice ▁Engineering ▁adapted ▁its ▁existing ▁Group ▁C ▁design ▁to ▁take ▁a ▁ 3 . 5 L ▁D F Z ▁instead ▁of ▁the ▁previously ▁used ▁ 3 . 3 L ▁D FL ▁engine . ▁However ▁the ▁new ▁engine ▁caused ▁significant ▁problems ▁due ▁to ▁v ibration , ▁which ▁resulted ▁in ▁the ▁break age ▁of ▁components ▁and ▁a ▁significant ▁increase ▁in ▁running ▁costs ▁- ▁Gordon ▁Sp ice ▁estimated ▁that ▁the ▁D F Z - power ed ▁car ▁was ▁about ▁four ▁times ▁more ▁expensive ▁to ▁run ▁than ▁the ▁D FL - eng ined ▁one . ▁ ▁D FR ▁From ▁ ▁Ben et ton ▁had ▁been ▁operating ▁as ▁the ▁works ▁Ford ▁team , ▁essentially ▁taking ▁over ▁the ▁role ▁from ▁the ▁now ▁def unct ▁Ha as ▁L ola ▁team . ▁With ▁the ▁abandon ment ▁of ▁tur bo charg ing ▁it ▁was ▁clear ▁that ▁the ▁v ener able ▁D F V / Y / Z ▁design ▁was ▁now here ▁near ▁being ▁compet itive ▁with ▁far ▁newer ▁offer ings ▁from ▁H onda