
Keywords: 32/40DF and 51/60DF; Engine models from M/S MAN Diesel; 34DF and 50DF; Engine models from M/S Wartsila; BDC; Bottom dead centre; BMEP; Brake mean effective pressure; C-10 DFNG; C-12 DFNG, and C-15 DFNG, Engine models from M/S Caterpillar; CA; Crank angle;