The Range Rover 12 HA85AA is a 4,394 cc, V8 naturally aspirated petrol engine produced between 2002 and 2005. It features a dual overhead camshaft (DOHC) layout with 32 valves and electronic sequential fuel injection. In standard form it delivered 210 kW (286 PS) and 420 Nm of torque, providing smooth, linear power delivery suited to luxury SUV performance.
Fitted exclusively to the L322 Range Rover (2002–2005 MY), the 12 HA85AA was engineered for refined, effortless crui…
Production years 2002–2005 meet Euro 3 standards . No Euro 4 variants were produced for this engine code.
The Range Rover 12 HA85AA is a 4,394 cc V8 petrol engine engineered for full-size luxury SUVs (2002–2005). It combines DOHC architecture with sequential multi-point fuel injection to deliver smooth, high-torque performance. Designed to meet Euro 3 emissions standards, it balances refinement with robust off-road capability.
| Parameter | Value | Source |
|---|---|---|
Displacement | 4,394 cc | |
Fuel type | Petrol (Unleaded) | |
Configuration | V8, DOHC, 32‑valve | |
Aspiration | Naturally aspirated | |
Bore × stroke | 94.0 mm × 79.0 mm | |
Power output | 210 kW (286 PS) @ 5,750 rpm | |
Torque | 420 Nm @ 4,000 rpm | |
Fuel system | Bosch ME7.2 sequential multi-point injection | |
Emissions standard | Euro 3 | |
Compression ratio | 10.2:1 | |
Cooling system | Water‑cooled with dual electric fans | |
Turbocharger | None | |
Timing system | Dual chain (primary and secondary); tensioner wear-prone | |
Oil type | Refer to vehicle handbook / manufacturer specification | |
Dry weight | 215 kg |
The Range Rover 12 HA85AA was used exclusively in Land Rover's L322 platform with longitudinal mounting and no external licensing. This engine received platform-specific adaptations—reinforced engine mounts and bespoke intake manifolding—and from 2005 was replaced by the supercharged AJ-V8 variants, creating hard interchange limits. All adaptations are documented in OEM technical bulletins.
Engine Finders UK Ltd, which operates EngineCode.uk, can pass your enquiry to engine suppliers in the UK. The service is for vehicles in the United Kingdom, with UK delivery or fitting. This is a commercially connected service, and sending an enquiry does not confirm diagnosis or compatibility.
Diagnostic reminder: If a technician has recommended replacing the engine, you can send an enquiry to engine suppliers in the UK. Confirm the diagnosis first: an engine-code record does not diagnose a fault.
Field reports and technical service bulletins highlight component wear patterns under high-load operation. Adherence to manufacturer service intervals and approved fluid specifications is critical for long-term reliability.
Analysis derived from manufacturer technical service bulletins and industry workshop 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
The 12 HA85AA offers smooth V8 performance but early models (2002–2004) had timing chain tensioner issues. Post‑2004 revisions improved durability. With regular oil changes using ACEA A3/B4 5W‑30 and attention to emissions components, it can be dependable beyond 200,000 km.
Top issues include timing chain tensioner wear, secondary air injection valve clogging, valve cover oil leaks, and throttle body carbon buildup. These are documented in Land Rover TSBs and commonly seen in high-mileage examples. Emissions-related faults are frequent in short-trip driving.
This engine was used only in the L322 Range Rover 4.4i from model years 2002 to 2005. It was not shared with Jaguar or other Land Rover models. No transverse or licensed applications exist for this engine code.
Limited tuning potential exists due to naturally aspirated design. ECU remaps yield modest gains (~10–15 kW), but significant power increases require forced induction. Most owners retain stock tune for reliability. Any modification should include upgraded cooling and fuel system support.
Real-world consumption is ~14.5 L/100km (city) and ~10.2 L/100km (highway), or about 20 mpg UK combined. Expect 18–22 mpg (UK) on mixed roads. Fuel economy suffers with short trips or aggressive driving due to the large displacement and weight.
Yes. The 12 HA85AA is an interference engine. If the timing chain fails or jumps, piston-to-valve contact can cause catastrophic damage. Prompt attention to chain rattle or timing faults is essential to avoid major repairs.
Land Rover specifies SAE 5W‑30 synthetic oil meeting ACEA A3/B4 and JLR STJLR.03.5003 standards. Change every 16,000 km or annually. Correct oil is vital for timing chain lubrication and preventing sludge in the V8’s deep sump.
Comprehensive technical documentation and regulatory references
EngineCode.uk is operated by Engine Finders UK Ltd. It provides engine-reference information and an optional commercial enquiry service. It is not an official manufacturer website. Check the record's sources and confirm vehicle-specific details before relying on it for parts, repairs or replacement.
Our editorial standard prioritises relevant manufacturer documentation and official regulatory sources. The sources and verification status for a record should be checked alongside the data.
A statement is not verified merely because a source is listed. Where supporting evidence is missing or conflicting, the record should identify that limitation. Please report unsupported or inconsistent information.
Transparency in gaps
A missing or unverified value does not mean the manufacturer has withheld it. We distinguish information not yet verified, information not available to us, and information explicitly not disclosed by the source.
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.
Records are subject to review and correction. Source links, dates and verification notes should be read with the technical information. Our Editorial and Sourcing Policy explains our standards and review process.
Found an error or missing source? Report a problem with this page. Include the field or statement concerned and a supporting source if available. You can also email corrections@enginecode.uk.
Copyright and permissions
Images and other material may be protected by copyright. Attribution does not by itself grant permission to reuse material. If you believe material on this site infringes your rights, contact copyrights@enginecode.uk with the page URL and details of your claim. We will review the material and take appropriate action.
Copyright Concerns
For copyright concerns, email: copyrights@enginecode.uk
Our Privacy Policy explains how Engine Finders UK Ltd uses information from visits, vehicle lookups, enquiries and messages. Our Cookie Policy explains cookies and similar technologies and how to change your choices.
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.
Ownership and commercial services
EngineCode.uk is owned and operated by Engine Finders UK Ltd. Alongside our reference content, we offer an optional replacement-engine enquiry service through Engine Finders and may identify relevant services provided by businesses connected with us. These commercial connections are disclosed. Using an enquiry service is not required to read our reference content.
Engine Finders UK Ltd operates this website. Our optional enquiry service has a commercial purpose. Our Ownership and Commercial Disclosure explains the relationship between the reference website and that service. Participating suppliers pay a fee or subscription to participate on the network and receive quote requests.
Use this record as a starting point for identification. Specifications and vehicle applications may contain errors or omissions. Confirm the exact engine variant and compatibility using vehicle-specific documentation and a qualified supplier or technician.
All external links open in new tabs. Please verify current availability of resources.