 Nyorai kupfuurira kweiyi ndima - FW12 yakaratidza kukwikwidzana kweWilliams mumakwikwi mashomanana ekupedzisira emwaka wa1988. Pasinei zvose Mansell uye Patrese kurega kubva Portuguese Grand Prix Round 13, nani akanga kuuya inotevera nhangemutange kuSpain pamwe Mansell kupedza 2nd shure McLaren pamusoro Alain Prost, apo Patrese akapedza 5th mujaho aivawo Mansell wechipiri uye chete pfungwa zvibodzwa nhangemutange kuti mwaka pashure pokupedza runner-up zvose uye. Mansell akanga ari ipapo kurega kubva kumakwikwi maviri ekupedzisira emwaka muJapan zvose njodzi neLotus yaNelson Piquet neAustraliakutadza kumira, achigumisa rwendo rwake rwokutanga nechikwata pashure pemwaka mina uye kukunda 13, apo Patrese aizopedza 6th uye 4th mumakwikwi ose. 