Cosworth Once Built A Single-Cylinder F1 Engine That Hit 20,000 RPM

We’ve all heard of Cosworth’s three-cylinder engine test bed, used to develop the 1,000-horsepower V12 for the Aston Martin Valkyrie. Dedicated Cosworth fans may even have seen the company’s other three-cylinder test engine, used for the Gordon Murray T.50. But few people have ever seen this: The 90 HP,…