The Proton Persona 1.6 with the S4PH engine is a Malaysian compact sedan powered by the CamPro S4PH engine, a 1.6-liter DOHC 16-valve inline-4 petrol engine developed by Proton in collaboration with Lotus. Here’s a concise breakdown of the engine specification and a general description of the engine when described as ''empty'' (often meaning without add-ons or accessories, such as manifolds or wiring).

Proton S4PH 1.6L Engine Overview:

• Engine Code: S4PH
• Type: Naturally aspirated inline-4
• Displacement: 1,597 cc (1.6L)
• Bore x Stroke: 76 mm × 88 mm
• Valvetrain: DOHC, 16 valves
• Fuel System: Multi-point fuel injection
• Compression Ratio: ~10.0:1
• Power Output:
  
• ~110 hp (82 kW) @ 6,000 rpm
• 
  
• Torque:
  
• ~148 Nm @ 4,000 rpm
• 
  
• Fuel Type: Petrol
• Cooling System: Water-cooled
• Engine Block: Aluminum alloy
• Transmission Compatibility: 5-speed manual or 4-speed automatic

''Empty Engine'' Description

If you’re referring to an ''empty'' S4PH engine, it generally means:

• Bare engine block with cylinder head
• No intake/exhaust manifolds
• No alternator, starter, or AC compressor
• No wiring harness or ECU
• No throttle body or sensors attached
• May include crankshaft, pistons, and cams (long block), or may be stripped further (short block or bare block)

This kind of engine is usually sold for rebuilding purposes or as a base for a swap or performance build.

If you’re looking for something more specific (e.g., weight, swap compatibility, or internal component specs), let me know!