The Lancia Flavia 2.0L Flat-4 is a 1,991 cc, horizontally opposed four-cylinder naturally aspirated petrol engine produced between 1963 and 1970. It featured an aluminium alloy block and heads, single overhead camshafts per bank driven by chains, and a unique flat-four layout. This engine, delivering 101 kW (137 PS), was engineered for refined performance in Lancia's executive coupe and sedan, offering smoothness and a low center of gravity.
Fitted to the Lancia Flavia 2000 Coupé, Berlina, and Convertible, the flat-four was designed for balanced, high-speed touring with exceptional refinement. Its character prioritized linear power delivery and mechanical smoothness over peaky performance. Emissions compliance was managed through carburetion and ignition timing, predating formal Euro standards and governed by contemporary national regulations.
One documented service consideration is the potential for camshaft chain tensioner wear and guide failure over very high mileages, as noted in Lancia workshop bulletins from the late 1960s. This wear can lead to chain noise and, in extreme cases, timing issues. Regular inspection and adjustment of valve clearances were critical maintenance procedures to ensure optimal performance and longevity.
Production years 1963–1970 predate formal EU emissions standards. Compliance was governed by national regulations of the time.
The Lancia Flavia 2.0L Flat-4 is a 1,991 cc horizontally opposed four-cylinder naturally aspirated petrol engine engineered for executive models (1963-1970). It combines an aluminium alloy block and SOHC heads to deliver smooth, vibration-free power. Designed for the pre-catalytic converter era, it prioritizes mechanical refinement and driving comfort over modern emissions targets.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,991 cc | |
| Fuel type | Petrol | |
| Configuration | Flat-4, SOHC, 8-valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 88.0 mm × 82.0 mm | |
| Power output | 101 kW (137 PS) @ 5,500 rpm | |
| Torque | 172 Nm @ 3,500 rpm | |
| Fuel system | Twin-choke carburetor (Solex 40 PII) | |
| Emissions standard | Pre-Euro (National Regulations) | |
| Compression ratio | 9.0:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | None | |
| Timing system | Chain-driven SOHC (dual chains) | |
| Oil type | SAE 20W-50 (Mineral) | |
| Dry weight | 142 kg |
The flat-four layout provides exceptional smoothness and a low center of gravity, ideal for high-speed stability, but requires meticulous maintenance of its dual timing chains and tensioners. Using a quality mineral oil (SAE 20W-50) is recommended for its high-temperature stability. The Solex carburetor demands periodic cleaning and synchronization to ensure smooth operation. While robust, the chain tensioners are a known wear item and should be inspected during major services.
Oil Specs: Requires SAE 20W-50 mineral oil specification (Lancia Flavia Owner's Manual, 1964). Modern synthetic oils may not be suitable without expert consultation.
Emissions: Formal Euro standards did not exist during production (1963-1970). Compliance was with contemporary national vehicle regulations.
Power Ratings: Measured under DIN 70020 standards. Output is for the twin-carburetor 2000 specification (Lancia Sales Brochure, 1965).
Lancia Flavia Workshop Manual (1965 Edition)
Lancia Technical Bulletins (TB-63-01, TB-68-10)
Lancia Flavia Owner's Manual (1964 Edition)
DIN 70020 Engine Power Certification Standards
The Lancia Flavia 2.0L Flat-4 was used across Lancia's Flavia platform with longitudinal, front-engine mounting. This engine received platform-specific adaptations-different carburetor setups for Coupé/Convertible models-and from 1965 the 2000 models received increased displacement and power. All adaptations are documented in OEM technical bulletins.
Locate the engine code or serial number stamped on the flat boss on the front face of the crankcase, near the oil filter (Lancia Workshop Manual). The Flavia flat-four is visually identified by its horizontally opposed cylinder layout, aluminium alloy construction, and dual camshaft covers. Differentiate from the earlier 1.5L and 1.8L Flavia engines by its 88mm bore and 2.0L displacement. The distributor is mounted at the rear of the engine, between the cylinder banks.
The Flavia 2.0L's primary long-term consideration is wear in the dual timing chain system and carburetion, 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 (1963-1970) and historical workshop data. Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about LANCIA FLAVIA-2-0L-FLAT-4.
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EU emissions and type-approval regulations (e.g., CELEX:32007R0715, CELEX:32017R1151).
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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
WLTP and RDE testing procedures for emissions certification.
GOV.UK: Vehicle Approval
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