A two rotor, 1.72 liters (105 cu. in.) displacement per rotor, Stratified Charge Rotary Engine has been designed, fabricated and tested at the Rotary Engine Division of JDTI, Inc. This paper discusses the general design features, and background related to the model 2034R advanced technology rotary engine and its relationship to the other engine families under development at JDTI, Inc. Test results for three fuels are presented. The specific model, 2034R SCORE™ 170 is based upon aircraft engine requirements, however, the core power section can apply to a wide range of marine, vehicular and utility systems applications.