Porsche 911 Type 930/25 Engine Listing Analysis

The Type 930/25 engine is the quintessential “bulletproof” heart of the late-era G-Body Porsche 911 Carrera (1987–1989). In 2026, these engines are highly prized for their reliability and the classic air-cooled soundtrack, often serving as the primary choice for “backdate” projects or high-end restorations.

1. Technical Profile: Type 930/25

The 930/25 was specifically the US/Canada/Japan variant of the 3.2L Carrera engine, optimized for lower emissions.

• Displacement: 3.2 Liters ($3164\text{cc}$)

• Compression Ratio: $9.5:1$ (Lower than the European 930/20 to accommodate lower octane fuel and catalytic converters).

• Power Output: Originally rated at 217 hp and 195 lb-ft of torque.

• Fuel Management: Bosch Motronic (DME). This was a revolutionary “digital” step for Porsche, integrating both fuel injection and ignition control into a single ECU.

Listing Details

• Porsche 911 Type 930/25 Engine
• Refurbished 3.2L Flat-Six
• Electronic Ignition Components
• Bosch Fuel Injection Components
• Cooling Fan & Shroud
• Alternator
• Airbox
• Heat Exchangers
• Muffler
• Engine Tin

2. 2026 Market Valuation (Estimated USD)

By 2026, “refurbished” status carries a heavy premium, as most unrestored 3.2L engines have reached the point of requiring top-end rebuilds (valve guides/seats).

3. Listing Breakdown & Component Details

To maximize value in a 2026 listing, these specific included items should be highlighted:

• Bosch Motronic Components: Includes the critical Air Flow Meter (AFM) and the fuel rail. In 2026, a “refurbished” listing should specify if the AFM has been calibrated or if the fuel injectors were ultrasonic cleaned.

• Cooling Fan & Shroud: The 11-blade fan should be checked for “wobble” or cracks. For a 930/25, the shroud is typically black.

• Engine Tin: Essential for proper cooling. If the tin is missing or bent, the engine will overheat. In a refurbished sale, these are usually freshly powder-coated.

• Heat Exchangers & Muffler: These are often the first things to rust. Stainless steel upgrades (like SSI) significantly boost the resale value of the package.

• Electronic Ignition: This refers to the distributor and the DME sensors (Speed and Reference sensors). A refurbished engine should have brand-new sensors, as they are a common 3.2L failure point.

4. 2026 “Refurbished” Standards

In the current market, a “refurbished” 3.2L engine should ideally have had the following addressed:

1. Valve Guides: The original 3.2L guides were notoriously soft. A 2026 refurbishment should utilize bronze or upgraded alloy guides.

2. Head Studs: While not as problematic as the 2.7L, the Dilavar studs can still snap. Most top-tier refurbishments replace these with steel or ARP studs.

3. DME Relay: This is the “soul” of the 3.2L. Including a solid-state DME relay in the sale is a common 2026 value-add.