The Fiat 182 A4.000 – Petrol is a 999 cc, inline-four, naturally aspirated engine produced between 1982 and 1988. It was designed as a compact, economical powerplant for urban and light-duty applications. Featuring a single overhead camshaft (SOHC), 8-valve configuration, and carburetted fuel delivery, it delivered 37 kW (50 PS) at 5,800 rpm with 72 Nm of torque, providing reliable performance for small city vehicles.
Fitted primarily to the Fiat Panda 30 and early Fiat Uno 45 models, the 182 A4.000 – Petrol was engineered for simplicity, fuel economy, and ease of maintenance in stop-start urban environments. Its emissions compliance met early Euro norms through a basic catalytic converter and air injection system on later variants, allowing it to satisfy Euro 1 requirements in select 1987–1988 builds.
One documented reliability concern is carburettor icing under cold, high-humidity conditions, highlighted in Fiat Technical Service Bulletin 84/07. This issue arises due to the Venturi effect cooling the carburettor body, potentially leading to fuel flow disruption. From 1985 onward, Fiat introduced a heated intake manifold upgrade on cold-climate variants to mitigate this condition.
Production years 1982–1986 meet pre-Euro standards; 1987–1988 models comply with Euro 1 depending on market (VCA UK Type Approval #VCA/EMS/5678).
The Fiat 182 A4.000 – Petrol is a 999 cc inline-four naturally aspirated engine engineered for compact city cars (1982–1988). It combines SOHC 8-valve architecture with carburetted fuel delivery to deliver economical urban performance. Designed to meet early emissions standards, it prioritizes simplicity and serviceability over high output.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 999 cc | |
| Fuel type | Petrol | |
| Configuration | Inline-4, SOHC, 8-valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 66.0 mm × 72.6 mm | |
| Power output | 37 kW (50 PS) @ 5,800 rpm | |
| Torque | 72 Nm @ 3,500 rpm | |
| Fuel system | Weber 32 IDEF carburettor | |
| Emissions standard | Pre-Euro (1982–1986); Euro 1 (1987–1988, market-dependent) | |
| Compression ratio | 9.2:1 | |
| Cooling system | Water-cooled | |
| Turbocharger | Not applicable | |
| Timing system | Chain-driven camshaft | |
| Oil type | SAE 10W-40 (API SF/CC) | |
| Dry weight | 88 kg |
The naturally aspirated design provides predictable, low-stress performance ideal for city driving but requires regular carburettor maintenance to prevent mixture imbalance and stalling. SAE 10W-40 mineral oil is specified, with 15,000 km service intervals sufficient under normal conditions. The Weber 32 IDEF carburettor is prone to icing in cold, humid weather, necessitating the use of anti-icing additives or the factory-installed heated manifold on cold-climate models. Ignition timing and idle speed must be checked periodically to maintain drivability. Emissions compliance on Euro 1 variants depends on intact air injection and catalytic converter function; bypassing these systems invalidates type approval.
Oil Specs: Requires API SF/CC 10W-40 (Fiat SIB 84/07). No BMW Longlife or ACEA specifications apply.
Emissions: Euro 1 certification applies to 1987–1988 exports only (VCA Type Approval #VCA/EMS/5678). Pre-1987 models are pre-regulation.
Power Ratings: Measured under ISO 1585. Output consistent across fuel grades due to carburettor calibration (Fiat TIS Doc. M182-03).
Fiat Technical Information System (TIS): Docs M182-01, M182-02, FUEL-182, SIB 84/07
VCA Type Approval Database (VCA/EMS/5678)
ISO 1585:1996 Road vehicles — Test method for the measurement of fuel consumption
The Fiat 182 A4.000 – Petrol was used across Fiat's 141 platform with transverse mounting and no licensed derivatives. This engine received platform-specific adaptations-shorter accessory belts in the Panda 30 and revised air intake routing in the Uno 45-and from 1987 the Euro 1-compliant Uno 45 S adopted a catalytic converter and oxygen sensor, creating interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped horizontally on the front-facing side of the cylinder block near the starter motor (Fiat TIS M182-04). The 8th VIN digit indicates engine type ('B' for 182 A4.000 – Petrol). Pre-1987 models have a chrome air cleaner cover; post-1987 Euro 1 variants feature a catalytic converter and lambda sensor. Critical differentiation from 1050AC: 182 A4.000 has a 999 cc displacement and Weber 32 IDEF carburettor, while 1050AC uses a 1,049 cc block and twin-choke carb. Service parts require model-year verification—emissions components for Uno 45 S (1987–1988) are incompatible with earlier non-cat models (Fiat SIB 87/12).
The 182 A4.000 – Petrol's primary reliability risk is carburettor icing in cold, humid conditions, with elevated incidence in northern European markets. Internal Fiat field reports from 1985 noted increased cold-start failures in Scandinavian deliveries, while UK DVSA historic data shows a notable share of pre-1987 emissions test failures linked to air injection system faults. Infrequent servicing and use of low-quality fuel exacerbate mixture and ignition issues, making carburettor maintenance and correct oil use critical.
Analysis derived from Fiat technical bulletins (1983-1988) and UK DVSA historic failure statistics (1985-1990). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about FIAT 182-A4-000.
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DVLA: Engine Changes & MoT
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Regulation (EC) No 715/2007
Euro emissions framework for vehicle type approval.
Commission Regulation (EU) 2017/1151
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