NEVIS, or New Exhaust Valve & Intake System, is a type of internal combustion engine developed by Cesare Bortone in cooperation with the University of Perugia which utilizes a unique annular piston design on a sinusoidal cam to produce power.

Nevis is a small island in the Caribbean Sea that forms part of the inner arc of the Leeward Islands chain of the West Indies. Nevis and the neighbouring island of Saint Kitts constitute one country: the Federation of Saint Kitts and Nevis. Nevis is located near the northern end of the Lesser Antilles archipelago, about 350 km east-southeast of Puerto Rico and 80 km west of Antigua. Its area is and the capital is Charlestown.