In the title compound, C(32)H(32)O(4), the 4-propyl-benzoyl groups at the 1- and 8-positions of the naphthalene ring system are aligned almost anti-parallel, and their benzene rings make a dihedral angle of 8.64 (10)°. The dihedral angles between the naphthalene ring system and the benzene rings are 69.37 (8) and 69.45 (8)°. In the crystal, C-H⋯O inter-actions link adjacent mol-ecules via their aroyl groups.