The Lancia 835 A7.046 – Petrol is a 1,585 cc, inline‑four naturally aspirated petrol engine produced between 1985 and 1992. It features a single overhead camshaft (SOHC) design and electronic fuel injection, delivering outputs of 74 kW (100 PS) and 137 Nm of torque. Its simple, robust architecture provides predictable power delivery for everyday commuting.
Fitted to performance-oriented variants of the Delta platform, the 835 A7.046 was engineered for spirited driving character while maintaining cost-effective ownership. Emissions compliance for its era was managed through its electronic fuel injection and catalytic converter, allowing it to meet Euro 1 standards for the European market during its later production years.
One documented characteristic is the potential for distributor cap and rotor arm degradation in humid climates. This issue, noted in Lancia service bulletins, can lead to misfires and rough running if not inspected during routine maintenance. In 1987, Lancia revised the ignition system components to improve moisture resistance.
Production years 1985–1989 meet pre-Euro standards; 1990–1992 models comply with Euro 1 emissions (EC Directive 91/441/EEC).
The Lancia 835 A7.046 – Petrol is a 1,585 cc inline-four naturally aspirated petrol engine engineered for sporty hatchbacks (1985-1992). It combines SOHC architecture with electronic fuel injection to deliver smooth, linear power. Designed to meet evolving emissions standards, it balances spirited performance with dependable economy.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,585 cc | |
| Fuel type | Petrol | |
| Configuration | Inline-4, SOHC, 8-valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 80.0 mm × 78.9 mm | |
| Power output | 74 kW (100 PS) @ 6,000 rpm | |
| Torque | 137 Nm @ 3,500 rpm | |
| Fuel system | Weber-Marelli IAW electronic fuel injection | |
| Emissions standard | Pre-Euro (1985–1989); Euro 1 (1990–1992) | |
| Compression ratio | 10.0:1 | |
| Cooling system | Water-cooled | |
| Turbocharger | None | |
| Timing system | Belt-driven (requires periodic replacement) | |
| Oil type | SAE 10W-40 (API SG/CC) | |
| Dry weight | 128 kg |
The naturally aspirated engine provides smooth, predictable power ideal for spirited daily driving but requires strict adherence to the 60,000 km timing belt replacement interval to prevent catastrophic engine damage. Using the specified SAE 10W-40 oil is critical for maintaining valve train clearances. The Weber-Marelli injection system demands clean fuel to prevent injector clogging. The 1987 revision to the ignition system improved reliability in humid conditions; pre-1987 engines should have the updated distributor cap and rotor installed during service.
Oil Specs: Requires SAE 10W-40, API SG/CC specification (Lancia Delta Owner's Manual, Ed. 1985).
Emissions: Euro 1 certification applies to 1990-1992 models only (EC Directive 91/441/EEC). Pre-1990 models have no formal Euro standard.
Power Ratings: Measured under EEC 80/1269 standards (Lancia Group PT-1990).
Lancia Delta Workshop Manual, Edition 1986
Lancia Technical Bulletin: TB-85-01
European Commission: Directive 91/441/EEC
Lancia Engineering Report: ER-84-06
The Lancia 835 A7.046 – Petrol was used exclusively in the Lancia Delta platform with transverse front-wheel-drive mounting. This engine received specific adaptations for the performance-oriented HF variants, including unique engine mounts and intake routing. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the front face of the cylinder block, near the timing belt cover (Lancia Workshop Manual). The 8th digit of the VIN is 'E' for vehicles equipped with this 1.6L NA engine. Visually, it is identifiable by its black camshaft cover and lack of turbocharger or intercooler. Critical differentiation from turbo models: This engine has no turbo plumbing and uses a simpler intake manifold. Service parts, particularly the timing belt kit and ignition components, are specific to the HF application.
The 835 A7.046 – Petrol's primary reliability risk is ignition system failure due to distributor cap and rotor degradation, especially in humid environments. Lancia service documentation highlights this as a common cause of misfires and rough running. UK MOT statistics from the 1990s frequently cited ignition faults on high-mileage examples. Adherence to the manufacturer's timing belt and ignition component replacement schedule is critical for longevity.
Analysis derived from Lancia technical bulletins (1985-1992) and European Commission type-approval records. Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about LANCIA 835-A7-046.
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DVLA: Engine Changes & MoT
Official guidance on engine swaps and inspection implications.
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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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