Al–20 wt% Zn alloy was As-caste and centrifugal casted, the comparative study of mechanical, microstructure and tribological properties where found. Density of the Al–20 wt% Zn alloy has 2.80 ± 0.0684 gm/cc in centrifugal casting, where it has in as-cast 2.79 ± 0.0403 gm/cc. The chemical composition in alloy are tested in Spark Optical Emission Spectrometer, founds that Al–20 wt% Zn as 82.66% ± 0.0851% of aluminum and 16.82% ± 0.0845% of Zinc. The hardness of alloy in centrifugal is 95.1 ± 6.1 HV1 while in the as-cast is 79 ± 8.3 HV1. Due to centrifugal force in centrifugal casting the grain size and porosity percentage is lower to the as-cast, is found in the optical microscope, the ultimate tensile strength of alloy in as-cast is 214.65 ± 7.903 MPa and in the centrifugal cast is 214.61 ± 12.402 MPa. The wear rate of the alloy in as-cast is 531 µg/Nm in 40N load, speed of 600 rpm and disc diameter of 130 mm while in centrifugal casting is 507 µg/N in 40N load, speed of 400 rpm and disc diameter of 130 mm. The SEM images provided the microstructural abnormalities that will contribute to the failure of alloy in tensile test and the square EDX provided the fully characterize elemental composition of alloy. X-ray diffraction technique is adopted for qualitative analysis of phases in Al–20 wt% Zn alloy for intermetallics formed during As-cast and centrifugal casting.