He is evangelical, and a Baptist minister, although as a young Christian he was associated with the Elim Pentecostal Church. His charismatic roots have generated an interest in the theology of the Holy Spirit, especially in Luke-Acts. His books on the subject have included The Holy Spirit and Spiritual Gifts: Then and Now (1996) and Power from on High: The Spirit in Israel's Restoration and Witness in Luke-Acts (1996).
He also collaborated with Peter Cotterell on Linguistics and Biblical Interpretation (1989).
Until his retirement in 2011, Turner was Professor of New Testament at the London School of Theology. On retirement he was given the title of Emeritus Professor.