The peak in-cylinder pressure of 8.69 (at 4.8 CA aTDC), 9.59 (at 3.6 CA aTDC) MPa is obtained for the diesel, and 8.63 (at 5.2 CA aTDC), 9.5 (at 3.8 CA aTDC) MPa for the biodiesel at the injection pressure of 80 and 160 MPa, respectively.However, the peak in-cylinder pressure is changed according to injection pressure in high load condition.