nˈaɪntiːnhˈʌndɹɪd ˈeɪɾi nˈaɪn wʌzðə fˈɜːst jˈɪɹ wˌɛɹ nˈætʃɚɹəli ˈæspɚɹˌeɪɾᵻd ˈɛndʒɪnz wɜː kəmpˈʌlsɚɹi fɔːɹ ˈɔːl tˈiːmz ˈæftɚ ðə bˈænɪŋ ʌvðə tˈɜːbətʃˌɑːɹdʒd jˈuːnɪts æt ðɪ ˈɛnd ʌvðə pɹˈiːviəs sˈiːzən.
1989 was the first year where naturally aspirated engines were compulsory for all teams after the banning of the turbocharged units at the end of the previous season.