ðɪs wʌz æɾə tˈaɪm wɛn ðə ɹᵻlˈeɪʃənʃˌɪp bᵻtwˌiːn ðə tˈuː mˈɛn wʌz æɾ ɪts bɹˈeɪkɪŋ pˈɔɪnt, sˌoʊ ðɛɹ ɹˈaɪvəlɹi pˈʊʃt ðə dɪvˈɛləpmənt ʌvðə kˈɑːɹ fˈɑːɹ ɐhˈɛd ʌvðɪ ˈʌðɚ tˈiːmz æz ðeɪ tɹˈaɪd tʊ ˈaʊtdˈuː ˈiːtʃ ˈʌðɚ ɔːlðˈoʊ ðˈɛɹz wʌzɐ vˈɛɹi pˈʌblɪk ɹˈaɪvəlɹi, bˈoʊθ ˈæktʃuːəli wˈɜːkt wˈɛl təɡˌɛðɚɹ ɪn tˈɛstɪŋ ænd pɹˈɑːst bᵻlˈiːvd nˈiːðɚ hˈɛld bˈæk ˌɛni ˌɪnfɚmˈeɪʃən.
This was at a time when the relationship between the two men was at its breaking point, so their rivalry pushed the development of the car far ahead of the other teams as they tried to out-do each other (although theirs was a very public rivalry, both actually worked well together in testing and Prost believed neither held back any information).