The Lancia 831 B5.000 – Petrol is a 1,995 cc, inline‑four turbocharged petrol engine produced between 1989 and 1994. It features a dual overhead camshaft (DOHC) design with 16 valves and electronic fuel injection, delivering outputs of 147 kW (200 PS) and 294 Nm of torque. Its turbocharger with intercooler enables strong, sustained power delivery for high-performance driving.
Fitted exclusively to the Delta Integrale 16V and Evoluzione models, the 831 B5.000 was engineered for World Rally Championship dominance and road-going exhilaration. 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 production run.
One documented characteristic is the potential for turbocharger overboost conditions under aggressive driving. This issue, addressed in Lancia service bulletins, can trigger limp-home mode or damage the wastegate actuator. In 1991, Lancia revised the boost control solenoid and ECU mapping to improve reliability under sustained load.
Production years 1989–1994 meet Euro 1 emissions standards (EC Directive 91/441/EEC).
The Lancia 831 B5.000 – Petrol is a 1,995 cc inline-four turbocharged petrol engine engineered for high-performance hatchbacks (1989-1994). It combines DOHC 16-valve architecture with electronic fuel injection and an intercooled turbocharger to deliver rally-bred power. Designed to meet Euro 1 emissions standards, it balances motorsport-derived performance with road-legal compliance.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,995 cc | |
| Fuel type | Petrol | |
| Configuration | Inline-4, DOHC, 16-valve | |
| Aspiration | Turbocharged with intercooler | |
| Bore × stroke | 84.0 mm × 90.0 mm | |
| Power output | 147 kW (200 PS) @ 5,750 rpm | |
| Torque | 294 Nm @ 3,500 rpm | |
| Fuel system | Weber-Marelli IAW 4G electronic fuel injection | |
| Emissions standard | Euro 1 | |
| Compression ratio | 8.0:1 | |
| Cooling system | Water-cooled | |
| Turbocharger | Garrett T3 with integral wastegate | |
| Timing system | Belt-driven (requires periodic replacement) | |
| Oil type | SAE 10W-40 (API SG/CC) | |
| Dry weight | 152 kg |
The intercooled turbo provides explosive mid-range power ideal for spirited driving but requires strict adherence to 10,000 km oil change intervals to prevent turbo bearing failure. Using the specified SAE 10W-40 oil is critical for maintaining turbocharger health. The Weber-Marelli IAW 4G system demands clean, high-octane fuel to prevent injector clogging. The timing belt, which also drives the water pump, must be replaced every 60,000 km to prevent catastrophic engine damage. Post-1991 models feature a revised boost control solenoid per Lancia bulletin to prevent overboost.
Oil Specs: Requires SAE 10W-40, API SG/CC specification (Lancia Delta Integrale Owner's Manual, Ed. 1989).
Emissions: Euro 1 certification applies to all production years (EC Directive 91/441/EEC).
Power Ratings: Measured under EEC 80/1269 standards (Lancia Group PT-1992).
Lancia Delta Integrale Workshop Manual, Edition 1990
Lancia Technical Bulletin: TB-89-05
European Commission: Directive 91/441/EEC
Lancia Engineering Report: ER-88-14
The Lancia 831 B5.000 – Petrol was used exclusively in the Lancia Delta Integrale platform with transverse front-wheel-drive mounting. This engine, the pinnacle of Lancia's rally development, received specific adaptations for the 16V and Evoluzione variants, including strengthened internals and revised boost control. 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 'G' for vehicles equipped with this 2.0L 16V turbo engine. Visually, it is identifiable by its top-mounted intercooler and distinctive red camshaft covers. Critical differentiation from the 8-valve 831 B.000: This engine has 16 valves and a larger intercooler. Service parts, particularly the turbocharger and ECU, are specific to the 16V/Evoluzione models and are not interchangeable with earlier 8-valve units.
The 831 B5.000 – Petrol's primary reliability risk is turbocharger overboost or wastegate failure due to aggressive driving or ECU faults. Lancia service documentation highlights this as a common trigger for limp-home mode. UK MOT statistics from the 1990s frequently cited emissions faults on high-performance examples. Adherence to the manufacturer's oil change and timing belt schedule is critical for longevity.
Analysis derived from Lancia technical bulletins (1989-1994) and European Commission type-approval records. Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about LANCIA 831-B5-000.
Comprehensive technical documentation and regulatory references
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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)
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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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VCA Certification Portal
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