This newly-developed engine delivers a sophisticated fusion of exhilarating driving performance and excellent fuel efficiency. The compact high-efficiency twin scroll turbocharger is combined with an Atkinson Cycle engine with Dual VVT-iW. To realize optimum combustion, the innovative D-4ST features both direct and port injectors. This advanced Lexus engineering helps generate high torque from low through to high rpm ranges, high level responsiveness, as well as enhancing fuel economy.