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A computer code, AGNI-3D, was developed for the modeling of turbulent, reacting flows with sprays occurring inside of a Wankel engine based on unsteady, three-dimensional computations. The primary objective of the present study is to assess the limitations and capabilities of AGNI-3D in predicting the combustion characteristics of the stratified-charge rotary engine (SCRE) that is being developed at the John Deere Rotary Engine Division. This engine has been modified recently with the inclusion of a second ignition source to supplement the standard pilot ignitor. Experimental tests of the modified dual-ignition Wankel engine demonstrated a 7.5% reduction in brake specific fuel consumption (BSFC) at low loads. Additional reductions in BSFC at high loads were limited by the onset of combustion instability.