The automotive industry is seriously concerned with emission level control, vehicle weight reduction and recycling. These are the purposes of introducing the all aluminium cylinder blocks for the combustion engine: The spray forming process led to the fabrication of cylinder liners made of high aluminium silicon alloys. The aim of the present work was to evaluate and compare the microstructures and mechanical properties of three cylinder liners: grey cast iron; and two aluminium silicon alloys. Their surface roughness and topology also have been investigated.