1987 World Rally Championship
Ford Motor Company made its return to serious competition by enlisting drivers Ari Vatanen and Stig Blomqvist , but struggled early on with the Sierra XR 4x4 . The car was dropped , its replacement on the works team coming in the end of the season in the form of the redesigned Sierra RS Cosworth , which met with much greater success , challenging the dominant Lancias in the final three events of the season . 
<triplet> Sierra XR 4x4 <subj> Ford Motor Company <obj> manufacturer