In the present study numerical calculations are performed for a 4-stroke, single cylinder compression ignition, water-cooled, direct injection engine with a bore of 8.75 cm and a stroke of 11cm. The numerical calculations are performed using a multidimensional code, which solves the governing equations for continuity, mass, momentum, energy and species concentration equations using time marching finite volume method. The spray distribution in the combustion chamber is important to understand the fuel-air mixing and subsequent combustion phenomena. The pre-processor code es-ice is used for dynamic grid generation, computational fluid dynamics code STAR-CD is used for solving the governing equations and post-processing the results. Stochastic Legrangian-Multiphase approach is used in modeling the fuel injection process. A six hole, solid cone type of fuel injector is considered in this analysis.  The geometry of bowl in piston plays very important role in fuel-air mixing. In the present study, a hemispherical bowl (HSB) and deep bowl (DB) is considered for the simulation from  200 bTDC  in compression stroke to 800 aTDC in expansion stroke.  The fuel injection is assumed to start at 50 bTDC (7150 crank angle) and ends at 50 aTDC(7250 crank angle). The engine is assumed to run at 1500 rpm. The spray distribution, number of droplet parcels, droplet temperature, droplet velocity, distribution of fuel droplets after fuel injection at different crank angles is discussed for the two bowl configurations. The effect of piston bowl on the spray penetration and fuel air mixing is presented.