The Lancia F 105 L is a 1,584 cc, inline‑four naturally aspirated petrol engine produced between 1967 and 1974. It featured a cast iron block, aluminium cylinder head, and a single overhead camshaft (SOHC) driven by a chain. This engine, known for its smoothness and reliability in its era, delivered 70 kW (95 PS) and 128 Nm of torque, powering the Fulvia coupe and sedan.
Fitted primarily to the Lancia Fulvia Berlina and Coupé models, the F 105 L was engineered for refined touring and agile handling. Its character balanced adequate power for its time with mechanical simplicity and durability. Emissions compliance for its production period was managed through carburetion and ignition timing, predating formal Euro standards.
One documented service consideration is the potential for timing chain elongation over very high mileages, as noted in Lancia workshop bulletins from the early 1970s. This is a common wear item for chain-driven SOHC engines of the period. Regular inspection and adjustment of valve clearances were recommended maintenance procedures to ensure optimal performance.
Production years 1967–1974 predate formal EU emissions standards. Compliance was governed by national regulations of the time.
The Lancia F 105 L is a 1,584 cc inline‑four naturally aspirated petrol engine engineered for compact executive models (1967-1974). It combines a robust cast iron block with an aluminium SOHC head to deliver smooth, linear power delivery. Designed for the pre-catalytic converter era, it prioritizes mechanical durability and driving refinement over modern emissions targets.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,584 cc | |
| Fuel type | Petrol | |
| Configuration | Inline‑4, SOHC, 8‑valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 82.0 mm × 75.0 mm | |
| Power output | 70 kW (95 PS) @ 6,000 rpm | |
| Torque | 128 Nm @ 4,000 rpm | |
| Fuel system | Twin-choke carburetor (Weber 32/36 DGEV) | |
| Emissions standard | Pre-Euro (National Regulations) | |
| Compression ratio | 9.0:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | None | |
| Timing system | Chain-driven SOHC | |
| Oil type | SAE 20W-50 (Mineral) | |
| Dry weight | 135 kg |
The SOHC design provides a smooth and tractable powerband ideal for spirited driving on winding roads but requires periodic valve clearance adjustments every 10,000 km to maintain performance and prevent valve train noise. Using a quality mineral oil (SAE 20W-50) is recommended for its high-temperature stability in the older engine design. The twin-choke Weber carburetor demands periodic synchronization and cleaning to ensure smooth idle and throttle response. While robust, the timing chain should be inspected for wear during major services.
Oil Specs: Requires SAE 20W-50 mineral oil specification (Lancia Fulvia Owner's Manual, 1969). Modern synthetic oils may not be suitable without expert consultation.
Emissions: Formal Euro standards did not exist during production (1967-1974). Compliance was with contemporary national vehicle regulations.
Power Ratings: Measured under DIN 70020 standards. Output is for the standard twin-carburetor configuration (Lancia Sales Brochure, 1970).
Lancia Fulvia Workshop Manual (1970 Edition)
Lancia Technical Bulletins (TB-68-01, TB-72-15)
Lancia Fulvia Owner's Manual (1969 Edition)
DIN 70020 Engine Power Certification Standards
The Lancia F 105 L was used across Lancia's Fulvia platform with longitudinal, front-engine mounting. This engine received platform-specific adaptations-different intake manifolds for Berlina and Coupé models-and from 1970 the facelifted Fulvia models received minor carburetor and ignition updates. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the flat boss on the front face of the cylinder block, just below the cylinder head (Lancia Workshop Manual). The F 105 L is visually identified by its cast iron block, aluminium head, and distinctive twin-choke Weber carburetor mounted on a cast alloy intake manifold. Differentiate from the earlier F 105 by its 1,584 cc displacement (82mm bore) versus the F 105's 1,216 cc. The distributor is mounted at the rear of the cylinder head.
The F 105 L's primary long-term consideration is wear in the valve train and carburetion system, common for engines of its era. Lancia workshop data indicates that with proper maintenance, these engines are highly durable. Neglect of basic servicing, particularly oil changes and valve adjustments, is the main factor leading to premature wear.
Analysis derived from Lancia technical bulletins (1967-1974) and historical workshop data. Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about LANCIA F105L.
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