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 engin…
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 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.
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.
The most common questions about engine codes, what they mean, how to find them and how this database works
With meticulous maintenance, particularly strict oil changes every 10,000 km and timing belt changes every 60,000 km, it can be very reliable. Its rally-bred design is robust, but neglect, especially of the turbocharger and boost control system, leads to premature failure. Regular servicing and gentle cooldowns after hard driving are key to longevity.
The most critical issue is turbocharger overboost or wastegate failure. Other common problems include timing belt failure, faults in the Weber-Marelli fuel injection system, and oil leaks from the camshaft covers. All are well-documented in Lancia service literature.
This engine was used exclusively in the Lancia Delta Integrale 16V and Evoluzione models from 1989 to 1994. It was not fitted to any other Lancia models, making it the definitive engine for the legendary rally homologation special.
Yes, it is highly tunable. Simple ECU chip tuning or boost controller adjustments can yield significant gains. The robust bottom end and 16-valve head can handle increased power, making it a favorite for enthusiasts. Major modifications like larger turbos and intercoolers are common in the tuning scene.
Fuel economy is typical for a high-performance turbo engine of its era. Expect around 14-16 L/100km (20-18 mpg UK) in city driving and 9-10 L/100km (26-24 mpg UK) on the highway. Real-world combined figures typically fall between 11-13 L/100km (21-18 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 turbocharger bearings and engine internals, especially given its performance nature.
Comprehensive technical documentation and regulatory references
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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.
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