World ▁R ally ▁C ars ) ▁with ▁significantly ▁lower ▁running ▁costs . ▁The ▁Mc R ae ▁R 4 ▁was ▁designed ▁for ▁use ▁in ▁r ally ing , ▁r ally ▁cross , ▁circuit ▁racing ▁and ▁ice ▁racing ▁events , ▁with ▁the ▁possibility ▁of ▁a ▁one - make ▁race ▁series . ▁ ▁Design ed ▁by ▁Col in ▁Mc R ae ▁and ▁Dave ▁Plant ▁and ▁built ▁by ▁DJ M ▁Race ▁Pre par ation , ▁the ▁Mc R ae ▁R 4 ' s ▁ch ass is ▁is ▁based ▁on ▁a ▁steel ▁safety ▁c age ▁with ▁carbon ▁pan elling ▁front ▁and ▁rear , ▁and ▁a ▁steel - cover ed ▁co ck pit ▁area . ▁Sus p ension ▁consists ▁of ▁tw in ▁wish b ones ▁with ▁Prof lex ▁d amp ers . ▁The ▁body ▁sty ling ▁has ▁been ▁done ▁by ▁Keith ▁Bur den ▁and ▁Tom ▁Web ster . ▁It ▁appears ▁that ▁some ▁components ▁of ▁the ▁vehicle ▁have ▁been ▁taken ▁from ▁existing ▁production ▁cars , ▁the ▁door line ▁in ▁particular ▁appears ▁very ▁close ▁to ▁that ▁of ▁the ▁Ford ▁Ka . ▁ ▁The ▁engine ▁is ▁a ▁naturally ▁asp ir ated , ▁ 4 - cy l inder , ▁ 2 . 5 - lit re ▁Mill ington ▁Diam ond ▁Engine ▁producing ▁ 3 5 0 ▁B HP . ▁Trans mission ▁is ▁via ▁a ▁six - speed ▁g ear box , ▁manual ▁or ▁semi - autom atic , ▁and ▁by ▁mechanical ▁front ▁and ▁rear ▁differential s ▁with ▁the ▁option ▁of ▁mechanical ▁or ▁active ▁central ▁differential . ▁The ▁car ▁can ▁be ▁produced ▁in