The Volkswagen AN is a 1,970 cc, air‑cooled, flat‑four petrol engine produced between 1973 and 1979. It features a horizontally opposed cylinder layout, pushrod valve actuation, and a single downdraft carburettor. In standard form for the Type 4 platform, it delivered approximately 66 kW (90 PS) and 140 Nm of torque, providing the highest factory output for air — cooled Type 4 engines while retaining mechanical simplicity.
Fitted primarily to the Volkswagen Type 4 (411/…
Volkswagen
Production years 1973–1979 meet pre-Euro emissions standards .
The Volkswagen AN is a 1,970 cc air-cooled flat-four petrol engine engineered for rear-engine vehicles (1973-1979). It combines a simple pushrod valvetrain with a single carburettor to deliver robust performance and adequate torque for larger vehicles. Designed for the emissions regulations of its time, it prioritizes mechanical robustness over high output.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,970 cc | |
Fuel type | Petrol | |
Configuration | Flat-4, OHV, 8-valve | |
Aspiration | Naturally aspirated | |
Bore × stroke | 94.0 mm × 71.0 mm | |
Power output | 66 kW (90 PS) @ 4,800 rpm | |
Torque | 140 Nm @ 3,000 rpm | |
Fuel system | Single 34 PICT-3 downdraft carburettor | |
Emissions standard | Pre-Euro (1970s) | |
Compression ratio | 7.7:1 | |
Cooling system | Air-cooled (fan-forced) | |
Turbocharger | Not applicable | |
Timing system | Gear-driven camshaft | |
Oil type | Refer to vehicle handbook / manufacturer specification | |
Dry weight | 110 kg |
The Volkswagen AN was used exclusively in Volkswagen's Type 4 platform with rear longitudinal mounting. This engine received minor running changes-standardised carburettor jets and ignition components for different model years-but no significant platform-specific adaptations or facelift revisions occurred, ensuring broad parts interchangeability. All variations are documented in OEM parts catalogues.
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.
The AN's primary reliability risk is oil leakage from aged seals, with elevated incidence in high-mileage or infrequently driven vehicles. Volkswagen workshop data indicated this as the most common service item, while owner reports frequently cite carburettor tuning and ignition points wear as secondary concerns. Neglecting valve adjustments presents a significant risk, making proactive maintenance critical.
Analysis derived from Volkswagen technical bulletins (1973-1979) and aggregated UK owner-reported failure data (2000-2023). 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 AN is renowned for its mechanical simplicity and potential for extreme longevity if properly maintained. The primary long-term concern is oil leakage, which is easily addressed. With regular valve adjustments, ignition servicing, and carburettor maintenance, these engines can reliably exceed 200,000 miles. Their non-interference design means timing failure is not catastrophic.
The most common problems are oil leaks from various seals and gaskets, carburettor tuning issues leading to poor running, and wear of the ignition points/condenser. Less common but critical is neglecting valve clearance adjustments, which can lead to burnt valves. These are well-documented in Volkswagen service manuals and enthusiast communities.
The AN 2.0L petrol engine was used in the Volkswagen Type 4 (411/412) from 1973-1974 and in the Volkswagen Vanagon (T2b Transporter) from 1973 until 1979. It was the top-of-the-line air-cooled engine for these rear-engined models during that period.
Yes, within limits. Common upgrades include fitting dual carburettors, a performance camshaft, and a free-flowing exhaust, which can yield modest power gains. More significant power increases require increasing displacement or forced induction, which is complex. Its design prioritizes torque and reliability over high RPM power.
Fuel economy is moderate for its era and displacement. Expect approximately 13.0 L/100km (22 mpg UK) in city driving and 9.0 L/100km (31 mpg UK) on the highway. Combined consumption typically falls between 10-11 L/100km (26-28 mpg UK), heavily influenced by vehicle weight (especially in Vanagons) and driving style.
No. The AN, like most pushrod engines of its design, is a non-interference engine. If the timing gears were to fail (which is exceedingly rare), the pistons would not contact the valves, preventing catastrophic internal damage. This is a significant reliability advantage.
For models from 1975 onwards, a good quality 10W-40 or 15W-40 mineral or semi-synthetic oil is suitable. For earlier models (pre-1975), non-detergent SAE 30 oil was originally specified to prevent sludge in the dry-sump system, though modern detergent oils are often used successfully with more frequent changes.
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.