 Senna naHäkkinen vakashamiswa zvikuru nemotokari injini yekubatanidza, pasinei ne 3512s poor reliability record kubvira paakatanga Fomula One uye kutendeseka kwayo kwakashata panguva yekuedzwa mugumisiro wakanakisisa weinjini kusvika panguva iyoyo waiva nzvimbo yechitatu yechitatu pa 1990 Japanese Grand Prix, iyo yaizopedzisira yava mugumisiro wayo wakanakisisa. Häkkinen akataura kuti panguva yomuedzo weSilverstone, imwe yemotokari dzakaputika sezvo akanga achimhanya achidzika neHanger Straight. Akataura kuti kusvikira panguva yokuputika injini yakanga ichibudisa simba rakawanda zvikuru uye chaizvoizvo yakanzwa ichikurumidza zvikuru kupfuura Ford. Akataurawo kuti kuputika kwacho kwakanga kwakakura zvikuru nezvimedu zveinjini zvaitobhururuka zvichipfuura nenguwani yake. Senna gare gare akawedzera runyerekupe rwekuti motokari yacho yaizomhanya mumwaka wa1993 paakataura panguva yekuyedza Zvaizonakidza kwazvo kumhanya neLamborghini muJapan. Kutenda kwake kwaiva kwokuti pasinei nokuvimbika, McLaren-Lamborghini yaizova inokurumidza kufanana neWilliams-Renaults neBenetton-Fords ayo akanga achitamburira kuti arambe ari mumakwikwi achishandisa Ford V8 yevatengi kunyange zvazvo Senna akakunda muJapan achishandisa Ford V8 uye akatsigira izvozvo nekukunda kwake kwekupedzisira muAustraliaChiGerman. Senna akatonzi akafonera Ron Dennis kubva kumabhokisi panguva yeEstoril test maererano nemishumo Dennis akatora runhare mumotokari yake yega sezvo akanga ari muEngland panguva iyoyo uye akamuudza kuti ainzwa kuti vaifanira kufunga zvakadzama nezvekushandisa V12 panzvimbo yeV8. 