The Lancia 831 B.000 – Petrol is a 1,995 cc, inline‑four turbocharged petrol engine produced between 1985 and 1994. It features a dual overhead camshaft (DOHC) design and electronic fuel injection, delivering outputs ranging from 105 kW (143 PS) to 129 kW (175 PS) and torque figures between 220–270 Nm. Its turbocharger enables strong low — end response for spirited driving.
Fitted to performance — oriented models like the Delta HF Turbo and Integrale, the 831 B.000 was engi…
Production years 1985–1989 meet pre-Euro standards; 1990–1994 models comply with Euro 1 emissions (EC Directive 91/441/EEC).
The Lancia 831 B.000 – Petrol is a 1,995 cc inline-four turbocharged petrol engine engineered for performance hatchbacks (1985-1994). It combines DOHC architecture with electronic fuel injection and a turbocharger to deliver strong, accessible torque. Designed to meet evolving emissions standards, it balances rally-inspired performance with road-going practicality.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,995 cc | |
Fuel type | Petrol | |
Configuration | Inline-4, DOHC, 8-valve | |
Aspiration | Turbocharged | |
Bore × stroke | 84.0 mm × 90.0 mm | |
Power output | 105–129 kW (143–175 PS) | |
Torque | 220–270 Nm @ 2,500–3,500 rpm | |
Fuel system | Weber-Marelli IAW electronic fuel injection | |
Emissions standard | Pre-Euro (1985–1989); Euro 1 (1990–1994) | |
Compression ratio | 8.0:1 | |
Cooling system | Water-cooled | |
Turbocharger | IHI or Garrett T3 (depending on variant) | |
Timing system | Belt-driven (requires periodic replacement) | |
Oil type | Refer to vehicle handbook / manufacturer specification | |
Dry weight | 148 kg |
The Lancia 831 B.000 – Petrol was used primarily in the Lancia Delta platform with transverse front-wheel-drive mounting. This engine powered various performance trims and received specific adaptations for the legendary Integrale variants, including intercoolers and revised boost control. All adaptations are documented in OEM technical bulletins.
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The 831 B.000 – Petrol's primary reliability risk is turbocharger failure due to inadequate lubrication or overheating. Lancia service documentation highlights this as a common failure mode in vehicles with neglected oil changes. UK MOT statistics from the 1990s frequently cited oil leaks and emissions faults on high-mileage examples. Adherence to the manufacturer's oil change and timing belt schedule is critical for longevity.
Analysis derived from Lancia technical bulletins (1985-1994) 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's lubrication, leads to premature failure. Regular servicing is key to longevity.
The most critical issue is turbocharger failure due to oil starvation. Other common problems include timing belt failure, faults in the Weber-Marelli fuel injection system, and oil leaks from the camshaft seals. All are well-documented in Lancia service literature.
This engine was used in various Lancia Delta performance models from 1985 to 1994, including the HF Turbo, HF 4WD, Integrale, and Integrale 16V. It was not fitted to any other Lancia models, making it synonymous with the Delta's rally success.
Yes, it is highly tunable. Simple ECU chip tuning or boost controller adjustments can yield significant gains. The robust bottom end 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 performance turbo engine of its era. Expect around 12-14 L/100km (20-17 mpg UK) in city driving and 8-9 L/100km (29-26 mpg UK) on the highway. Real-world combined figures typically fall between 10-11 L/100km (24-21 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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Regulatory Stability
EU regulations are referenced using CELEX identifiers for long-term stability.
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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