Dhameystir weedha soo socota: 641 wuxuu ahaa nooc horumarsan oo ka mid ah kii ka horreeyay, 1989 Ferrari 640, oo uu naqshadeeyay John Barnard. Naqshadeynta 641 ee la cusbooneysiiyay waxaa kormeeray naqshadeeyaha hore ee McLaren Steve Nichols ka dib markii Barnard uu ka tagay Ferrari si uu ugu biiro kooxda Benetton, markii horumarka gaariga la dhammaystiray. Baabuurka waxaa ku shaqeeya 3.5-litir V12 engine, marka hore nooca 036, ka dibna
San Marino oo la cusbooneysiiyay 037. V12 waxaa lagu qiimeeyay, kaliya wax yar ayaa ka hooseeya matoorrada Honda V10 ee ay isticmaalaan McLaren, laakiin ma ahan mid dabacsan ama u fiican bixinta awoodda ka baxsan geesyada gaabiska ah sida Honda, matoorka Renault V10 ee ay isticmaalaan Williams ama Ford-Cosworth HB V8 ee ay isticmaalaan Benetton. Inkastoo ay mashiinkeedu culus yahay, 641 waxay ka mid ahayd gawaarida ugu wanaagsan ee la qabsan karo ee shabakadda. Prost ayaa ku dhawaaqay in uu yahay gaariga ugu wanaagsan sanadka.