In 1974, the Series 3 was introduced, with the main changes being to the engine compartment, to keep in line with new noise legislation.
ɪn nˈaɪntiːnhˈʌndɹɪd sˈɛvənti fˈoːɹ, ðə sˈɪɹiz θɹˈiː wʌz ˌɪntɹədˈuːst, wɪððə mˈeɪn tʃˈeɪndʒᵻz bˌiːɪŋ tə ðɪ ˈɛndʒɪn kəmpˈɑːɹtmənt, tə kˈiːp ɪn lˈaɪn wɪð nˈuː nˈɔɪz lˌɛdʒɪslˈeɪʃən.