The Lancia 834 B2.246 – Petrol is a 1,995 cc, inline‑four naturally aspirated petrol engine produced between 1985 and 1992. It features a dual overhead camshaft (DOHC) design and electronic fuel injection, delivering outputs of 85 kW (115 PS) and 168 Nm of torque. Its high — revving character provides linear power delivery for refined touring.
Fitted to premium variants of the Delta and Thema platforms, the 834 B2.246 was engineered for smooth, quiet operation and everyda…
Production years 1985–1989 meet pre-Euro standards; 1990–1992 models comply with Euro 1 emissions (EC Directive 91/441/EEC).
The Lancia 834 B2.246 – Petrol is a 1,995 cc inline-four naturally aspirated petrol engine engineered for premium hatchbacks and sedans (1985-1992). It combines DOHC architecture with electronic fuel injection to deliver smooth, linear power. Designed to meet evolving emissions standards, it balances refinement with dependable performance.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,995 cc | |
Fuel type | Petrol | |
Configuration | Inline-4, DOHC, 8-valve | |
Aspiration | Naturally aspirated | |
Bore × stroke | 84.0 mm × 90.0 mm | |
Power output | 85 kW (115 PS) @ 5,800 rpm | |
Torque | 168 Nm @ 4,500 rpm | |
Fuel system | Weber-Marelli IAW electronic fuel injection | |
Emissions standard | Pre-Euro (1985–1989); Euro 1 (1990–1992) | |
Compression ratio | 9.8:1 | |
Cooling system | Water-cooled | |
Turbocharger | None | |
Timing system | Belt-driven (requires periodic replacement) | |
Oil type | SAE 10W-40 (API SG/CC) | |
Dry weight | 138 kg |
The Lancia 834 B2.246 – Petrol was used in the Lancia Delta and Thema platforms with transverse and longitudinal mounting respectively. This engine received specific adaptations for each platform, including different intake manifolds and engine mounts. All adaptations are documented in OEM technical bulletins.
The 834 B2.246 – Petrol's primary reliability risk is timing belt tensioner failure due to age and wear. Lancia service documentation highlights this as a common cause of belt noise and potential slippage. UK MOT statistics from the 1990s frequently cited ignition and emissions faults on high-mileage examples. Adherence to the manufacturer's timing belt and tensioner 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.
The most common questions about engine codes, what they mean, how to find them and how this database works
With meticulous maintenance, particularly strict timing belt and tensioner changes every 60,000 km, it can be very reliable. Its naturally aspirated design is simpler and more robust than turbocharged variants. Regular oil changes and using correct fuel are key to longevity. Pre-1988 engines benefit from the updated tensioner.
The most critical issue is timing belt tensioner wear, leading to noise or potential belt failure. Other common problems include general timing belt failure, faults in the Weber-Marelli fuel injection system, and oil leaks from the valve cover gasket. All are well-documented in Lancia service literature.
This engine was used in the Lancia Delta (GT, GTie) and Thema (2.0 i.e.) models from 1985 to 1992. It was the standard 2.0L naturally aspirated petrol engine for these premium variants before the widespread adoption of turbocharging.
Minor gains are possible via ECU chip tuning, a free-flow exhaust, or performance camshafts. However, significant power increases are limited by the 8-valve head and lack of forced induction. It responds well to maintenance and breathing modifications for a more responsive feel.
Fuel economy is reasonable for its era and displacement. Expect around 11-13 L/100km (26-22 mpg UK) in city driving and 7-8 L/100km (40-35 mpg UK) on the highway. Real-world combined figures typically fall between 9-10 L/100km (31-28 mpg UK).
Yes. It is an interference engine design. If the timing belt fails, the pistons will collide with the open valves, causing severe internal damage that requires a complete engine rebuild or replacement.
Lancia specified SAE 10W-40 engine oil meeting API SG/CC standards. Using a high-quality mineral or semi-synthetic oil of this grade is essential for protecting the engine's bearings and valve train, especially given its performance nature.
Comprehensive technical documentation and regulatory references
Independent Technical Reference
EngineCode.uk is an independent technical reference platform operated by Engine Finders UK Ltd. We are not affiliated with LANCIA or any other manufacturer. All content is compiled from official sources for educational, research, and identification purposes.
Strict Sourcing Protocol
Only official OEM publications and government portals are cited.
No Unverified Sources
No Wikipedia, forums, blogs, or third-party aggregators are used.
Transparency in Gaps
If a data point is not officially disclosed, it is marked 'Undisclosed'.
Regulatory Stability
EU regulations are referenced using CELEX identifiers for long-term stability.
LANCIA Official Site
Owner literature, service manuals, technical releases, and plant documentation.
EUR-Lex
EU emissions and type-approval regulations (e.g., CELEX:32007R0715, CELEX:32017R1151).
GOV.UK: Vehicle Approval & V5C
UK vehicle approval processes, import rules, and MoT guidance.
DVLA: Engine Changes & MoT
Official guidance on engine swaps and inspection implications.
Vehicle Certification Agency (VCA)
UK type-approval authority for automotive products.
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
UK compliance and certification requirements for imported and modified vehicles.
VCA Certification Portal
Type-approval guidance and documentation.
Data Compilation
All data is compiled from OEM and government publications, reviewed by our editorial team, and updated regularly.
Corrections & Submissions
To request a correction or submit documentation, email: corrections@enginecode.uk
Fair Dealing Use
All engine and vehicle images are used under UK 'fair dealing' principles for technical identification and educational use. Rights remain with their respective owners.
Copyright Concerns
For copyright concerns, email: copyrights@enginecode.uk
GDPR Compliance
EngineCode.uk complies with UK GDPR. We do not collect personal data unless explicitly provided.
Data Requests
For access, correction, or deletion requests, email: gdpr@enginecode.uk
Trademark Notice
All trademarks, logos, and engine codes are the property of their respective owners. Use on this site is strictly for reference and identification.
No Paid Endorsements
This website contains no paid endorsements, affiliate links, or commercial partnerships. We do not sell parts or services.
Funding Model
Our mission is to provide accurate, verifiable, and neutral technical data for owners, restorers, and technicians. This site is self-funded.
All specifications and compatibility data verified against officialLANCIA documentation and EU/UK regulatory texts. Where official data is unavailable, entries are marked “Undisclosed”.
All external links open in new tabs. Please verify current availability of resources.