Smartstream G2.5 (G4KM/G4KN)
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Comes in two versions, 2.5 MPi (G4KM)[25] and 2.5 GDi (G4KN),[26] Bore is 88.5 mm (3.48 in) with a 101.5 mm (4.00 in) stroke.
The Smartstream G2.5 MPi is an inline 4-cylinder engine with multi-port injection and a 10.5:1 compression ratio; the engine makes 179.5 PS (177 hp; 132 kW) at 6,000 rpm and 23.7 kg⋅m (171 lb⋅ft; 232 N⋅m) of torque at 4,000 rpm.
The Smartstream G2.5 GDi is an inline 4-cylinder engine with both direct and multi-port injection and a 13.0:1 compression ratio; the engine makes 194 PS (191 hp; 143 kW) at 6,100 rpm and 25 kg⋅m (181 lb⋅ft; 245 N⋅m) of torque at 4,000 rpm in the Sonata, for