After the less successful P15, BRM developed a much simpler monoposto with the P25, which nevertheless offered some refinements. However, the car initially proved to be very unreliable, even if there was no lack of basic speed. Eventually, reliability improved and the first victories followed. Its career ended prematurely when the mid-engine revolution began, which BRM was also unable to escape. This racing car report describes the history of the four-cylinder BRM and shows it in modern and historical images.