Kinetics of toluene alkylation with methanol over silica modified HZSM-5 catalyst under experimental conditions that are closed to envisaged industrial conditions are studied. Of the several possible kinetic models tested and compared, a simple power law model is found satisfactory in predicting toluene conversions and p-xylene selectivities. However further studies with comprehensive experimental program, is suggested for investigating the numerous side reactions and to account for a large number of by-products observed.