N20 may refer to: Roads Route nationale 20, in France N20 road (Ireland) Navajo Route 20, in Arizona, United States Other uses N20 (Long Island bus) BMW N20, an automobile engine EFW N-20, a Swiss jet fighter aircraft London Buses route N20 Nitrogen-20, an isotope of nitrogen Toyota Hilux (N20), a Japanese pickup truck N20, a postcode district in the N postcode area See also N2O (disambiguation), with a letter O in place of a zero 20N (disambiguation)