Proton CamPro engine

The CamPro is a family of petrol passenger car engines made by the Malaysian carmaker Proton Holdings, and it was the first engine the company developed in house. The name is short for cam profiling. The prototype was shown on 6 October 2000 at the Lotus factory in the United Kingdom, and the production engine debuted in 2004 in the Proton Gen-2, as a 1.6 litre unit known as the S4PH with a 1.3 litre sister called the S4PE. Later variants added a cam profile switching system with a variable length intake manifold, a stand-alone intake air-fuel module, a turbocharged CFE version and, from 2014, a variable valve timing family that dropped the CamPro name. It powered a long list of Proton models including the Saga, Persona, Waja, Exora, Preve, Suprima S and Iriz, and every version uses electronic throttle control.