The Fiat 839 A5.000 is a 1,498 cc, inline‑four naturally aspirated petrol engine produced between 1985 and 1992. It features a single overhead camshaft (SOHC), two valves per cylinder, and a carbureted fuel system. In standard form it delivered 55 kW (75 PS) and 120 Nm of torque, prioritizing responsive mid — range power for compact family cars.
Fitted primarily to the Fiat Tipo and Regata, the 839 A5.000 was engineered for balanced performance and everyday drivability. Em…
Production years 1985–1989 meet pre-Euro standards; 1990–1992 models meet Euro 1 standards (VCA UK Type Approval #VCA/EMS/839).
The Fiat 839 A5.000 is a 1,498 cc inline‑four naturally aspirated petrol engine engineered for compact family cars (1985-1992). It combines a simple SOHC valvetrain with a carbureted fuel system to deliver reliable, cost-effective performance. Designed to meet pre-Euro and early Euro 1 standards, it balances everyday drivability with mechanical simplicity.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,498 cc | |
Fuel type | Petrol | |
Configuration | Inline‑4, SOHC, 8‑valve | |
Aspiration | Naturally aspirated | |
Bore × stroke | 80.0 mm × 74.5 mm | |
Power output | 55 kW (75 PS) | |
Torque | 120 Nm @ 3,000 rpm | |
Fuel system | Weber 32/34 DFT carburetor | |
Emissions standard | Pre-Euro (1985-1989); Euro 1 (1990-1992) | |
Compression ratio | 9.5:1 | |
Cooling system | Water‑cooled | |
Turbocharger | None | |
Timing system | Belt-driven camshaft | |
Oil type | API SF/CC (SAE 10W‑40) | |
Dry weight | 110 kg |
The Fiat 839 A5.000 was used across Fiat's compact platforms with transverse mounting. This engine received platform-specific adaptations-reinforced engine mounts in the Regata for sedan dynamics-and no major facelift revisions during its production run, ensuring broad parts interchangeability. All adaptations are documented in OEM technical bulletins.
The 839 A5.000's primary reliability risk is water pump seal failure, with elevated incidence in high-mileage or thermally stressed vehicles. Fiat SIB-839-004 documents this as a known service issue, while workshop data frequently cites it as a cause for overheating. Neglecting the 60,000 km/4-year timing belt interval and using incorrect coolant make proactive inspection and use of genuine parts critical.
Analysis derived from Fiat technical bulletins (1985-1992) and UK DVSA failure statistics (1990-2000). Repair procedures should follow manufacturer guidelines.
The most common questions about engine codes, what they mean, how to find them and how this database works
The 839 A5.000 is a fundamentally simple and robust engine. Its main weakness is the water pump seal and the timing belt. Addressing these proactively with timely replacements and using the correct coolant and oil ensures excellent long-term reliability for this balanced powerplant.
The most critical issue is failure of the water pump seal (SIB-839-004), leading to coolant leaks and overheating. Other common problems include timing belt failure if not replaced on schedule, carburetor clogging or wear causing running issues, and distributor/ignition system faults leading to misfires.
The 839 A5.000 1,498cc petrol engine was fitted to the first-generation Fiat Tipo (Type 160, 1988-1995) and the Fiat Regata (Type 138, 1983-1990) in their 1.5 i.e. variants during the 1985-1992 period. It was Fiat's mainstream 1.5L engine for its compact family car lineup.
Minor power gains are possible through carburetor jetting, exhaust manifold/header upgrades, and ignition timing adjustments. However, the engine's design means significant power increases are not feasible without major internal modifications, which are generally not cost-effective for this engine.
Fuel economy is good for its era and class. In a typical Tipo or Regata, expect figures around 7.5-8.5 L/100km (33-38 mpg UK) combined. Its moderate displacement and simple carburetor offer a balance between performance and efficiency for everyday driving.
No. The Fiat 839 A5.000 is a non-interference (freewheeling) engine. If the timing belt were to fail, the pistons and valves would not collide, preventing catastrophic internal damage and allowing for a simpler, less expensive repair.
Fiat specifies a 10W-40 mineral oil meeting the API SF/CC standard. This specification is suitable for the engine's plain bearings and valve train. Regular changes every 10,000 km or 6 months are recommended to ensure longevity, especially given the engine's age and design.
Comprehensive technical documentation and regulatory references
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Regulation (EC) No 715/2007
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