ɐn ɐdˈɪʃənəl fˈæktɚ wʌz ðæt æz spˈiːdz ɪŋkɹˈiːst, ˌoʊvɚtˈeɪkɪŋ bɪkˌeɪm mˈoːɹ dˈɪfɪkəlt ðə fˈæstɪst kˈɑːɹ wʊd ˈɔːlmoʊst ˈɔːlweɪz wˈɪn ðə ɹˈeɪs, æz lˈɔŋ æz ɪt hˈɛld təɡˌɛðɚ lˈɔŋ ɪnˈʌf tə fˈɪnɪʃ.
An additional factor was that as speeds increased, overtaking became more difficult - the fastest car would almost always win the race, as long as it held together long enough to finish.