page_title: Hyundai Gamma engine
section_title: 1.6 Gamma T-GDI (G4FJ)
hierarchical_section_title: Hyundai Gamma engine / 1.6 L / 1.6 Gamma T-GDI (G4FJ)
caption_attribution_description: English: Divided exhaust manifold with two "scrolls" (spirals) flowing into two angled inlets to the twin-scroll turbocharger on the Hyundai T-GDI engine
context_page_description: The Hyundai Gamma engine was introduced in 2006 to replace the existing Hyundai Alpha engine. There are 1.4 L and 1.6 L versions of this engine. The most recent, "clean-sheet" iteration is the 2020 Gamma II which is part of the new Smartstream family, reverting to MPI in lieu of GDI for the non-turbo version, and first debuting in the 2020 Hyundai Accent and Kia Rio and in the 2020 Hyundai Venue, each in the United States. The Gamma II is distinguished by CVVD which is the first introduction of "continuously variable valve duration" allowing control of the total length of time the intake valves are held open. It can apparently run in Atkinson cycle under low loads for additional fuel economy with the ability to shift to Otto cycle on demand due to high loads or extra acceleration.
context_section_description: It is a version of 1.6 Gamma GDi with twin-scroll turbocharger, air guided intercooler, direct fuel injection system and dual CVVT.
  The engine was unveiled in the 11th Hyundai-Kia International Powertrain Conference.
  The engine has been revised in the 2nd Generation Veloster Turbo to include a new pressurized cooling system, higher compression ratio of 18, electronically actuated wastegate, and a new ECU (CPEGD2.20.3).
caption: Exhaust and twin-scroll turbocharger of the T-GDI version
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