Aluminium–silicon alloys are commonly used to manufacture automotive pistons due to their favourable strength to weight ratio. This project investigates how alloying elements affect the microstructure and wear behaviour of both eutectic (Al-12.6Si-2.3Ni-5.5Cu) and hyper eutectic (Al-18Si-2.3Ni-5.5Cu) aluminium–silicon alloys used in pistons. The alloys were produced through gravity die casting and subjected to T6 heat treatment. Wear and friction properties were assessed using a pin-on-disc tribometer at various sliding velocities (0.4–1 m/s) and normal loads (15–60 N) over a sliding distance of 500 m. Results indicate that wear rate initially decreases with increased sliding speed but eventually increases, with a critical sliding speed identified at 0.6 m/s. The decrease in wear rate at higher speeds is attributed to reduced contact time between surfaces. Additionally, the coefficient of friction decreases with increasing speed and normal load, while wear rate increases with higher load. Eutectic alloys exhibited lower wear rates compared to hyper eutectic alloys.