With BRM in financial trouble after the V16 experiment, Alfred Owen purchased the team and set work on a new car.

The engine was mounted to a simple ladder frame steel chassis, with a centre tub monocoque section.

Three Type 25s were entered for Tony Brooks, Mike Hawthorn, and Ron Flockhart in the model's world championship debut, the 1956 British Grand Prix.

Four more points finishes from Behra, Schell, and new-hire Joakim Bonnier placed BRM 4th in the inaugural Constructor's Championship.

Just as the P25 became reliable, Cooper started the rear-engine revolution and quickly rendered front engined cars such as the P25 obsolete.

In addition to the factory entries, the British Racing Partnership ran a P25 for Stirling Moss and Hans Herrmann in 1959.