The Lancia 198 A4.000 is a 1,498 cc, inline‑four petrol engine produced between 1985 and 1992. It features a single overhead camshaft (SOHC) and a carburetted fuel system, delivering a balance of economy and adequate performance for its class. Peak power is rated at 63 kW (86 PS), with torque of 120 Nm, providing confident acceleration for its intended applications.
Fitted primarily to the Lancia Delta and Prisma models, the 198 A4.000 was engineered for drivers seeking reliable, no-frills transportation with modest power. Its character emphasizes low-to-mid range torque for everyday drivability and ease of maintenance. Emissions compliance for its production period was met through basic engine tuning, aligning with prevailing Euro 1 standards.
One documented concern is premature wear of the timing belt tensioner pulley, which can lead to belt slippage or failure if not inspected. This issue, referenced in Lancia Service Bulletin 03/89, is often linked to material fatigue under prolonged heat cycles. The tensioner design was revised in later production runs to improve durability.
Production years 1985–1992 meet Euro 1 standards as per applicable Italian type approval regulations of the era.
The Lancia 198 A4.000 is a 1,498 cc inline‑four petrol engine engineered for compact sedans and hatchbacks (1985-1992). It combines a carburetted fuel system with a single overhead camshaft to deliver economical, low-stress performance. Designed to meet Euro 1 standards, it prioritises simplicity and urban drivability over high output.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,498 cc | |
| Fuel type | Petrol | |
| Configuration | Inline‑4, SOHC, 8‑valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 76.0 mm × 82.5 mm | |
| Power output | 63 kW (86 PS) @ 5,800 rpm | |
| Torque | 120 Nm @ 3,500 rpm | |
| Fuel system | Single-barrel carburettor | |
| Emissions standard | Euro 1 | |
| Compression ratio | 9.5:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | None | |
| Timing system | Belt-driven camshaft | |
| Oil type | SAE 10W-40 (mineral or semi-synthetic) | |
| Dry weight | 105 kg |
The carburetted system provides simple, low-cost maintenance but requires periodic adjustment and cleaning to maintain optimal fuel mixture and prevent stalling. SAE 10W-40 oil is recommended for its balance of protection and flow in the SOHC design. The timing belt is a critical wear item; replacement every 60,000 km or 4 years is mandatory to prevent catastrophic interference engine damage, as specified in Lancia Service Bulletin 03/89. The engine's modest power output makes it best suited for city and suburban driving.
Oil Specs: Requires SAE 10W-40 specification (Lancia Owner's Manual Delta). API SF/CC or equivalent quality standard recommended.
Emissions: Euro 1 certification applies to all production years (1985-1992) under Italian type approval regulations.
Power Ratings: Measured under EEC 80/1269 standards. Output figures are net ratings (Lancia Group PT-1987).
Lancia Technical Information System: Technical Manual Delta
Lancia Group Powertrain Specifications (PT-1987)
Italian Ministry of Transport Type Approval Archives
EEC Directive 80/1269 (Engine Power Measurement)
The Lancia 198 A4.000 was used in Lancia's Delta and Prisma platforms with transverse mounting. This engine received minor platform-specific adaptations for ancillary component placement. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the flat boss at the front of the cylinder block, near the gearbox flange (Lancia Tech Manual Delta). The code '198 A4.000' is clearly visible. Visually, it can be identified by its single-barrel carburettor and lack of complex emissions equipment. Differentiation from the 1.6L and 2.0L variants is by displacement badge on the rear hatch and the engine code itself. Service parts are generally consistent across the Delta and Prisma production runs for this engine variant.
The 198 A4.000's primary reliability risk is timing belt failure due to neglected maintenance. While generally robust, internal Lancia service data indicates a high correlation between skipped belt changes and engine seizures. Urban, stop-start driving accelerates belt wear, making strict adherence to the 60,000 km/4-year replacement interval critical.
Analysis derived from Lancia technical bulletins (1985-1992) and Italian MOT failure statistics (1990-2000). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about LANCIA 198-A4-000.
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DVLA: Engine Changes & MoT
Official guidance on engine swaps and inspection implications.
Vehicle Certification Agency (VCA)
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Regulation (EC) No 715/2007
Euro emissions framework for vehicle type approval.
Commission Regulation (EU) 2017/1151
WLTP and RDE testing procedures for emissions certification.
GOV.UK: Vehicle Approval
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VCA Certification Portal
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