Senna naHäkkinen vakashamiswa zvikuru nemotokari / injini yekubatanidza, pasinei ne 3512's poor reliability record kubva paFomula One yayo yekutanga uye kuvimbika kwayo kwakashata panguva yekuedzwa (mugumisiro wakanakisisa weinjini kusvika panguva iyoyo yaiva nzvimbo yechitatu yechitatu pa 1990 Japanese Grand Prix, iyo yaizopedzisira yava yakanakisisa yekupedzisira). 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 rwokuti motokari yacho yaizomhanya mumwaka wa1993 paakati panguva yekuedzwa ""Zvaizonakidza kwazvo kumhanya neLamborghini muJapan
"". Kutenda kwake kwaive kwekuti zvisinei nekuvimbika, McLaren-Lamborghini yaizove inokurumidza seWilliams-Renaults neBenetton-Fords avo vaaitambura kuti varambe vari mumakwikwi vachishandisa mutengi spec Ford V8 (kunyangwe Senna akakunda muJapan achishandisa Ford V8 uye akatsigira izvozvo nekukunda kwake kwekupedzisira muAustralia). 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.