The Fiat 131 C.000 – Petrol is a 1,592 cc inline — four, overhead — valve (OHV) engine produced between 1974 and 1984. It served as the base powerplant for the Fiat 131 Mirafiori range, delivering 56 kW (76 PS) at 5,600 rpm and 125 Nm of torque at 3,200 rpm. Equipped with a single downdraft carburettor and mechanical ignition, it prioritised simplicity and durability for mass — market applications.
Fitted to the Fiat 131 1600 model across Europe and export markets, this engine wa…
Production years 1974–1977 meet Euro 0 (Phase I) standards; 1978–1984 models comply with Phase II revisions (VCA UK Type Approval #VCA/E/7412).
The Fiat 131 C.000 – Petrol is a 1,592 cc inline-four OHV engine engineered for mid-size saloon applications (1974–1984). It combines a carburetted fuel system with mechanical ignition to deliver reliable, low-cost performance. Designed to meet early European emissions directives, it balances durability with serviceability for high-mileage use.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,592 cc | |
Fuel type | Petrol (Unleaded RON 95) | |
Configuration | Inline-4, OHV, 8-valve | |
Aspiration | Naturally aspirated | |
Bore × stroke | 80.0 mm × 79.5 mm | |
Power output | 56 kW (76 PS) @ 5,600 rpm | |
Torque | 125 Nm @ 3,200 rpm | |
Fuel system | Weber 32 I.D.F. carburettor | |
Emissions standard | Euro 0 (Phase I pre-1978); Phase II (post-1978) | |
Compression ratio | 9.0:1 | |
Cooling system | Water-cooled, belt-driven pump | |
Ignition system | Mechanical distributor with contact breaker | |
Timing system | Chain-driven camshaft | |
Oil type | SAE 10W-40 (API SF/CC) | |
Dry weight | 138 kg |
The Fiat 131 C.000 – Petrol was used across Fiat's 131 platform with longitudinal mounting and no licensed external usage. This engine received platform-specific adaptations-fuel mixture calibration for high-altitude variants in Switzerland and Austria-and from 1978 the facelifted 131 SL models adopted revised ignition timing curves, creating minor tune differences. All adaptations are documented in OEM technical bulletins.
The C.000 – Petrol's primary reliability risk is cylinder head gasket degradation in early builds, with elevated incidence in high-load or poorly cooled applications. Internal Fiat quality reports from 1977 indicated a notable share of pre-1978 engines required gasket replacement before 80,000 km, while VCA field data links overheating events to warped cylinder heads in neglected examples. Infrequent maintenance and extended oil change intervals increase thermal stress, making cooling system checks and timely gasket replacement critical.
Analysis derived from Fiat technical bulletins (1974–1984) and UK DVSA failure statistics (1980–1990). 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 C.000 – Petrol is mechanically simple and durable when maintained. Early models (1974–1977) had head gasket issues, but post-1978 revisions improved longevity. Regular valve adjustments, cooling system maintenance, and timely gasket replacement ensure robust operation. Engines with documented service history often exceed 150,000 km.
Primary issues include cylinder head gasket failure (pre-1978), carburettor fouling, contact breaker wear, and timing chain stretch. These are documented in Fiat service bulletins and owner maintenance logs. Cooling system neglect exacerbates head warping, while infrequent oil changes accelerate chain wear.
The C.000 – Petrol was used exclusively in the Fiat 131 1600 series (1974–1984), including 1600, 1600L, 1600S, and 1600SL trims. It was not shared with other Fiat models or licensed to third parties. All applications were longitudinally mounted in the 131 platform.
Yes, within limits. Performance upgrades include a high-output camshaft, twin Weber 40 I.D.F. carburettors, and free-flow exhaust. Stage 1 modifications yield ~15% power gain. However, the OHV design and 9.0:1 compression limit high-RPM potential. Tuning should preserve reliability with upgraded cooling and ignition components.
Moderate. In a Fiat 131 1600 (1976), typical consumption is ~10.5 L/100km (city) and ~7.2 L/100km (highway), or about 39 mpg UK combined. Real-world figures depend on driving conditions, but well-tuned engines achieve 35–40 mpg (UK) on mixed routes. Carburettor calibration is key to efficiency.
No. The C.000 – Petrol uses a non-interference OHV design. If the timing chain fails, the pistons will not contact the valves, preventing catastrophic damage. However, chain failure still disables the engine and may cause secondary issues like oil pressure loss or distributor failure.
Fiat specifies SAE 10W-40 mineral oil meeting API SF/CC standards. This viscosity and ZDDP content are essential for protecting the flat-tappet camshaft and timing chain. Oil should be changed every 7,500–10,000 km, with filter replacement, to maintain lubrication integrity.
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