Dr. Turner's research is primarily focused on spark-ignition combustion, pressure chargingsystems, alternative low-carbon fuels, e-fuels, and novel engine and powertrain concepts fortransport. This emphasis has been driven by many years working in the automotive industryand gaining a clear understanding of the challenges facing it. A major current researchdirection is the employment of hydrogen for motive power generation, both in combustionengines and fuel cells. The latter includes investigation of their integration into cycles withengines in order to improve overall efficiency and to provide new routes to fossil CO2mitigation and sequestration.​