The Gamma II can apparently run in Atkinson cycle (leaving intake open longer for more complete burn but less displacement) under low loads for additional fuel economy with the ability to shift to Otto cycle on demand under high loads or for extra acceleration.

Released in 2010, the Gamma II MPI version with dual CVVT (continuous variable valve timing) is a 1,591 cc (97.1 cu in) engine that makes 123–134 PS (90–99 kW; 121–132 hp) at 6,000–6,300 rpm with 15.4–16 kg⋅m (151–157 N⋅m; 111–116 lbf⋅ft) of torque at 4,500–4,850 rpm.

[7] Announced in 2011,[8] it is a version of 1.6 Gamma GDi with twin-scroll turbocharger, air guided intercooler, direct fuel injection system and dual CVVT.

[9] The engine has been revised in the 2nd Generation Veloster Turbo to include a new pressurized cooling system, higher compression ratio of 10:1, electronically actuated wastegate, and a new ECU (CPEGD2.20.3).

Its improved version equipped with Continuously Variable Valve Duration (CVVD) was released in 2019 as the Smartstream G1.6T (G4FP) engine.