8V

8V or 8-V may refer to:
 * Antoinette 8V, a 1907 French engine
 * Fiat 8V, a 1952 sports car
 * HF Integrale 8v, a model of Lancia Delta
 * 8v, abbreviations for 8 volts
 * 8V, abbreviation for 8-valve engine
 * Octavarium (album), an album released by Dream Theater
 * B-8V, a model of Bensen B-8
 * 8v, a model of Ford Duratec engine
 * 8V-71, engine used in Detroit Diesel Series 71
 * 8V-72, engine used in Detroit Diesel Series 92