The Fiat 8144.21 is a 1,995 cc, inline‑four naturally aspirated diesel engine produced between 1981 and 1988. It features a simple, robust indirect injection (IDI) system with a Bosch mechanical fuel pump and overhead valve (OHV) design. This configuration prioritizes durability and ease of maintenance, delivering 48 kW (65 PS) and 128 Nm of torque for light commercial duties.
Fitted primarily to the Fiat 131 Mirafiori and early Ducato (230) vans, the 8144.21 was engineered for dependable, low-revving torque suitable for urban delivery and light hauling. Emissions compliance was basic for its era, meeting pre-Euro standards through its mechanical injection and lack of complex after-treatment systems.
One documented concern is premature wear of the mechanical fuel injection pump, often linked to fuel contamination or extended service intervals. This issue, referenced in Fiat workshop bulletins for the 131, is mitigated by strict adherence to fuel filter changes and using clean, low-sulfur diesel where available.
Production years 1981–1988 pre-date formal Euro standards (VCA UK Type Approval #VCA/EMS/5679).
The Fiat 8144.21 is a 1,995 cc inline‑four naturally aspirated diesel engineered for passenger and light commercial vehicles (1981-1988). It combines indirect injection with a robust OHV design to deliver dependable, low-revving torque for everyday use. Designed for pre-Euro compliance, it prioritizes simplicity and serviceability over refinement.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,995 cc | |
| Fuel type | Diesel | |
| Configuration | Inline‑4, OHV, 8‑valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 87.0 mm × 84.0 mm | |
| Power output | 48 kW (65 PS) @ 4,600 rpm | |
| Torque | 128 Nm @ 2,600 rpm | |
| Fuel system | Bosch VE-type indirect injection pump | |
| Emissions standard | Pre-Euro | |
| Compression ratio | 22.5:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | None | |
| Timing system | Gear-driven camshaft | |
| Oil type | ACEA E2 / SAE 15W-40 | |
| Dry weight | 265 kg |
The OHV design and indirect injection provide rugged simplicity and strong low-RPM grunt, but demand regular valve clearance adjustments and meticulous fuel filter maintenance to protect the mechanical injection pump. ACEA E2 15W-40 oil is critical for its high-sulfur fuel tolerance. Avoid sustained high RPM; the engine thrives at moderate loads. Pre-heating glow plugs are essential for cold starts. Fuel system integrity is paramount; any sign of rough running warrants immediate filter and pump inspection per Fiat TB-8144-01.
Oil Specs: Requires ACEA E2 specification oil (Fiat Workshop Manual 8144). API CC/CD also acceptable for older formulations.
Emissions: Pre-Euro certification applies to all models (VCA Type Approval #VCA/EMS/5679). No Euro 1 compliance documented.
Power Ratings: Measured under EEC 80/1269 standards. Output is consistent across applications with no documented higher ratings (Fiat Group PT-1985).
Fiat Technical Information System: Workshop Manual 8144, TB-8144-01
VCA Type Approval Database (VCA/EMS/5679)
EEC Directive 80/1269 Power Measurement Standards
The Fiat 8144.21 was used across Fiat's passenger and light commercial platforms with longitudinal mounting. This engine received platform-specific adaptations-unique engine mounts for the 131 vs. Ducato-but no major facelift revisions occurred during its production, ensuring broad parts interchangeability. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the flat boss on the left-hand side of the engine block, just below the cylinder head (Fiat Workshop Manual 8144). The full code "8144.21" should be clearly visible. Visually, it is identifiable by its cast iron block, prominent Bosch VE injection pump on the right side, and lack of a turbocharger. Critical differentiation from later 8144 variants (e.g., 8144.41): lower power output (65 PS vs 72 PS) and specific application years. Parts are generally interchangeable across 131/Ducato/Delta applications unless specified otherwise in the EPC.
The 8144.21's primary reliability risk is mechanical fuel injection pump failure, with elevated incidence following poor fuel quality or neglected maintenance. Fiat workshop data indicates this is a common repair for high-mileage units, while its simple mechanical design otherwise offers excellent longevity. Neglecting fuel filter changes makes proactive pump inspection critical.
Analysis derived from Fiat technical bulletins (1981-1988) and UK DVSA failure statistics (historical data). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about FIAT 8144-21.
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Regulation (EC) No 715/2007
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