Guest
Here's a video about some Osella PA9/90 prototypes I recorded in previous years at some Italian hillclimb races. It was built in 1989 by Osella Corse, an Italian company specializes in building sport cars for hill climbing and minor sport race championships, as an evolution of the PA9 (1981) and PA9B/84 (1984). The PA9/90s were (and some of them still are) moved by a 2.0 liter BMW M12 (M12/7 - M12/10) engine which was able to produce around 300 bhp, depending on the evolution version used, and revving up to 10,000 rpm. The M12 was developed in 1973 when BMW decided to entered the Formula 2 championship as an engine supplier and where 2-liter engines with base and cylinder head derived from series production were required. The development started from their M10 ( initially known as the M115), a 4-cylinder 16-valve engine already used in the German touring championship and also mounted on their production sedan of the time, the Neue Klasse. For the first version of the M12, called M12/7, the bore
