The Lancia 156 B.000 is a 1,756 cc, inline‑four petrol engine produced between 1969 and 1976. It features a single overhead camshaft (SOHC) design and a twin-choke carburettor, delivering outputs around 74–77 kW (100–105 PS) and 135–140 Nm of torque. Its cast-iron block and alloy head construction provided a balance of durability and weight for its era.
Fitted primarily to the Lancia Fulvia Berlina and Coupé models, the 156 B.000 was engineered for spirited performance and touring capability. Emissions compliance for its production period was governed by national regulations, as the Euro emissions standards framework had not yet been established.
One documented engineering characteristic is susceptibility to timing chain elongation and tensioner wear under high-RPM use, as noted in Lancia Technical Service Bulletin TSB 72/05. This can lead to timing inaccuracies and reduced performance. Later production runs incorporated a revised tensioner design to improve service life.
Production years 1969–1976 predate the Euro emissions standards framework. Compliance was governed by national regulations in effect at the time of manufacture.
The Lancia 156 B.000 is a 1,756 cc inline‑four petrol engine engineered for compact executive cars (1969-1976). It combines a robust cast-iron block with a twin-choke carburettor to deliver responsive, linear power. Designed for the pre-Euro regulatory era, it prioritizes mechanical simplicity and driving engagement.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,756 cc | |
| Fuel type | Petrol | |
| Configuration | Inline‑4, SOHC, 8‑valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 80.0 mm × 72.6 mm | |
| Power output | 74–77 kW (100–105 PS) | |
| Torque | 135–140 Nm @ 4,000 rpm | |
| Fuel system | Twin-choke downdraft carburettor | |
| Emissions standard | Pre-Euro (National Standards) | |
| Compression ratio | 9.5:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | None | |
| Timing system | Chain-driven camshaft | |
| Oil type | SAE 20W-50 mineral oil | |
| Dry weight | 138 kg |
The engine provides a lively, rev-happy character ideal for spirited driving but requires diligent timing chain maintenance to prevent wear and power loss. Regular oil changes with the specified SAE 20W-50 mineral oil are essential for lubricating the chain tensioner and camshaft. The carburettor demands periodic synchronization. Vehicles used for high-RPM driving or competition should have the timing chain and tensioner inspected frequently, with replacement recommended per TSB 72/05 if elongation is detected.
Oil Specs: Requires SAE 20W-50 mineral oil specification (Lancia Workshop Manual Vol. 1). Modern equivalents meeting API SF are acceptable for classic use.
Emissions: Pre-dates Euro standards. Compliance was with national regulations of the manufacturing country (EU Historical Vehicle Regulations Archive).
Power Ratings: Measured under manufacturer's internal standards. Output varies slightly by model year and state of tune (Lancia Group PT-1975).
Lancia Technical Information System: Docs L-156-69, TSB 72/05
Lancia Workshop Manuals (Volumes 1 & 2)
EU Historical Vehicle Regulations Archive
The Lancia 156 B.000 was used across Lancia's Fulvia platform with longitudinal front mounting. This engine received platform-specific adaptations-unique engine mounts for the Berlina versus the Coupé-creating minor interchange considerations. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the flat machined surface of the cylinder block, adjacent to the distributor (Lancia Workshop Manual Vol. 2). The code "156 B.000" is clearly visible. Visual identification: Features a single SOHC cover and a prominent twin-choke carburettor on the intake manifold. Critical differentiation from smaller 1.3L/1.6L Fulvia engines: Larger displacement confirmed by bore/stroke and specific carburettor model. Service parts for the timing chain and tensioner require verification against the TSB 72/05 revision for engines produced after 1972.
The 156 B.000's primary reliability risk is timing chain and tensioner wear, with elevated incidence in vehicles subjected to sustained high RPMs or competition use. Lancia service data indicates this was a recognized service item, while owner club surveys consistently cite regular chain inspection as critical for maintaining performance. Preventative replacement of the chain and tensioner is strongly advised for engines with unknown service history.
Analysis derived from Lancia technical bulletins (1970-1976) and aggregated data from Lancia owner club technical forums (1985-2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about LANCIA 156-B-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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