Inside the Avanza's 1.5 L Engine

The engine in the Avanza, Veloz and Yaris is a 1,496 cc inline-four (bore 72.5 mm × stroke 90.6 mm) that fires in the order 1-3-4-2, so one cylinder is always on its power stroke every half turn of the crank. Everything on screen comes from one crank angle: the exact piston position, the cam lobes lifting the valves, and an Otto-cycle pressure model calibrated to the published 136 Nm at 4,200 rpm and 76.5 kW at 6,000 rpm. Valve timing and rod length are estimates, labelled in the model. Where the fuel goes after this is in Fuel Cost by Distance.