The Campro car engine for Proton is the first automotive engine ever developed by the Malaysian automotive corporation, Proton. The name Campro is short for Cam Profile. This engine powers the Proton Gen-2, the Proton Satria Neo, the Proton Waja Campro as well as Proton's future models. Engines and GearBoxes are here providing quality used, reconditioned or secondhand Proton car engines. The Campro engine is aimed to show Proton's ability to make their own engines that produces good power output and meets newer emission standards.

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Basic DOHC engine

The basic Campro engine coded as S4PH is a basic DOHC 16-valve 1.6 L engine that produces 110 bhp (82 kW) @ 6,500 rpm of horsepower and 148 N-m of torque. This is the engine that powers the Proton Gen-2. The S4PH engine can be fitted with Cam Profile Switching (CPS) and Variable Inlet Manifold (VIM) technology. Besides this 1.6 L engine, Proton has produced the 1.3 L version of the Campro engine.
Even though the S4PH engine seems to be quite powerful at higher revs, its performance is reportedly sluggish at lower revs and this is proven by driving the Gen-2 uphills where drivers who drive the manual transmission version have to shift a lot between 2nd gear and 3rd gear. This is due to its torque dip between 3,000 ~ 3,500 rpm where the torque decreases slightly before picking up back to the maximum torque at 4,000 rpm.

Campro CPS and VIM engine
In addition to the basic DOHC engine, Proton developed its own variable valve timing technology that works similar with other variable valve technologies such as Honda VTEC and Toyota VVTi, named as CPS (Cam Profile Switching) technology. The usage of CPS tehnology will raise the maximum power up to about 127 bhp and will improve the low-end torque to its maximum value which will maintain until about 5,000 rpm. The technology is said to be applied to newer Gen-2s and future models starting from the end of 2005, but currently the CPS technology is still under testing.
The Campro's Variable Intake Manifold technology is currently being developed by Robert Bosch GmbH, and is expected to make it's debut in the second half of 2007.

Campro GDI engine
Recently, Proton is developing their own gasoline direct injection version of Campro engines which will be used in the future. Currently, the Campro GDI engine is still under research and development, therefore very little information available for the Campro GDI engine.

Supercharged Campro engine
Recently, Proton has announced to collaborate with Kleemann, the company that supplies superchargers for Mercedes-Benz compressor models for the coming Proton Satria replacement model. Little is known about the engine, but the engine is rumored as a 1.8L engine equipped with a supercharger supplied by Kleemann.

Hybrid Campro engine
Recently, Proton and Lotus have announced their concept model of a Proton Gen-2 powered by a hybrid powerplant that uses the Campro engine. The concept model wasrevealed during the 2007 Geneva Motor Show in March 2007.
The hybrid powerplant system, which is known as EVE system (Efficient, Viable, Environmental) will be using the same S4PH engine as the one that powers the present gasoline version of the Gen-2, combined together with a 30 kW, 144V electric motor. The main purpose of the hybrid powerplant system is to provide a hybrid system that can be retrofitted to existing models, retaining the same powerplant and also eliminates the need to develop a completely different platform, like the Honda Civic Hybrid.

The EVE Hybrid System will have 3 key technologies
"Micro-hybrid" start-stop system - An integrated starter-alternator system is installed to switch off the engine automatically when the engine stops, for example at the traffic light. The engine will automatically restart when the gas pedal is depressed.
Full parallel hybrid technology - Combines the existing S4PH engine with a 30 kW, 144V electric motor, resulting in higher power (141 bhp combined), higher torque (233 N-m combined), lower emission (up to 22% carbon dioxide reduction) and better fuel economy (up to 28%). The system also includes regenerative braking system.
Continuously Variable Transmission (CVT) - The CVT system provides an infinite number of gear ratios for better efficiency.

The combined power and torque for the powerplant system are as follows
Max power (gasoline engine only): 110 bhp (82 kW) @ 6,000 rpm
Max torque (gasoline engine only): 148 N-m @ 4,000 rpm
Max power (combined): 141 bhp (105 kW) @ 5,500 rpm
Max torque (combined): 233 N-m @ 1,500 rpm (limited to 180 N-m continuous)

Proton Cars are: Arena, Gen-2, Perdana, Putra, Saga, Satria, Satria R3, Savvy, Juara, Tiara, Waja, Wira.