Table 1: Engine main characteristics.

Naturally aspirated 4-cylinder in-line, stoichiometric spark ignition Bore × stroke 80.5 mm × 78.4 mm Total displacement 1596 cm3 Volumetric compression ratio 10.5 : 1 Rated power 76 kW at 5750 rpm Rated torque 144 Nm at 4000 rpm Number of valves per cylinder 4 (2 for intake—2 for exhaust) NG feeding system Electronic timed multipoint injection