Bousou Sengokushi
Japanese title: 暴走戦國史
Alternative titles: Spectre, Hosai Sengoku Shi Spectre/Requiem, Hosai Sengoku Shi Spectre, Hosai Sengoku Shi Requiem, Racing Civil War Chronicle Spectre/Requiem, Racing Civil War Chronicle Spectre, Racing Civil War Chronicle Requiem, Bousou Sengokushi: Spectre Tanjou
Type: OVA
Source: Manga
Episodes: 2
Status: Finished Airing
Aired: Feb 1, 1991 to Nov 21, 1991
Duration: 45 min per ep
Rating: PG-13 - Teens 13 or older
Genres: Action

Modern-day bikers make and break alliances with neighboring gangs, fight over the right to use a local petrol station, and are eventually united under a powerful leader. It's a replay of the events of Japan's 16th-century civil war, but with bikes instead of horses and knives instead of swords. Based on the manga by Jiro Ueno in Weekly Playboy.

(Source: The Anime Encyclopedia)