The Renault F8M 720 is a 1,870 cc, inline‑four naturally aspirated diesel engine produced between 1985 and 1996. It features a robust indirect injection (IDI) system with a Bosch mechanical fuel pump and a single overhead camshaft (SOHC) valvetrain. This engine prioritised durability and fuel economy over outright power, delivering approximately 47 kW (64 PS) and 120 Nm of torque, making it suitable for light commercial and passenger vehicles.
Fitted to models such as the R4, R5, R9, R11, and Express van, the F8M 720 was engineered for economical, low-stress driving in urban and regional settings. Its simple mechanical design offered ease of maintenance. Emissions compliance was basic for its era, meeting pre-Euro or early Euro 1 standards depending on the specific model year and market, primarily through engine tuning and basic exhaust filtration.
One well-documented reliability concern is cylinder head cracking, particularly between cylinders 2 and 3, often exacerbated by overheating or coolant system neglect. This issue, addressed in Renault technical notes, is linked to the head's casting design and thermal stress. Later production runs incorporated minor material or casting process revisions to improve durability.
Production years 1985–1992 meet pre-Euro standards; 1993–1996 models may have early Euro 1 compliance depending on market (VCA UK Type Approval data).
The Renault F8M 720 is a 1,870 cc inline‑four naturally aspirated diesel engineered for compact cars and light vans (1985-1996). It combines indirect injection with a robust SOHC design to deliver dependable, economical performance. Designed to meet pre-Euro and early Euro 1 standards, it prioritises longevity and serviceability over high output.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,870 cc | |
| Fuel type | Diesel | |
| Configuration | Inline‑4, SOHC, 8‑valve | |
| Aspiration | Naturally Aspirated | |
| Bore × stroke | 80.0 mm × 93.0 mm | |
| Power output | 47 kW (64 PS) @ 4,500 rpm | |
| Torque | 120 Nm @ 2,500 rpm | |
| Fuel system | Bosch VE-type mechanical injection pump | |
| Emissions standard | Pre-Euro / Euro 1 (market dependent) | |
| Compression ratio | 22.0:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | None | |
| Timing system | Chain-driven SOHC | |
| Oil type | Mineral 15W-40 (API CC/CD) | |
| Dry weight | 145 kg |
The F8M 720 provides steady, economical power ideal for city driving and light loads but requires vigilant cooling system maintenance to prevent cylinder head cracking. Using the specified mineral oil (15W-40) is critical for its older bearing and pump designs. The mechanical injection pump demands clean, high-cetane diesel to ensure smooth running and prevent pump wear. Regular valve clearance checks (every 20,000 km) are essential due to its mechanical tappets. While robust, the engine is sensitive to overheating; any temperature gauge anomaly should be investigated immediately to avoid costly head repairs.
Oil Specs: Requires API CC/CD mineral oil (15W-40) (Renault Service Manual 85-96). Modern low-SAPS oils are not recommended.
Emissions: Pre-Euro certification applies to pre-1993 models (VCA data). Euro 1 compliance for 1993-1996 models is market-specific and not universal.
Power Ratings: Measured under EEC 80/1269 standards. Output is consistent across applications with minor variations (Renault PT-1990).
Renault Technical Information System: Bulletins TB-85-001, TB-92-015
Renault EPC (Electronic Parts Catalogue) Ref. 77 11 198 545
Renault Service Manual (1985-1996 Diesel Engines)
The Renault F8M 720 was used across Renault's R4/R5/R9/R11 platforms with longitudinal mounting. This engine received platform-specific adaptations-simplified ancillaries for the Express van and different exhaust manifolds for the R9/R11-but no major facelift revisions occurred during its production, ensuring broad parts interchangeability. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on a flat boss on the block, typically near the fuel pump or on the bellhousing flange (Renault Service Manual). The code "F8M 720" is usually followed by a serial number. Visually, it is identifiable by its cast iron block, SOHC valve cover, and the prominent Bosch VE injection pump on the side. Critical differentiation from the similar F8M 722: The 720 has a lower compression ratio (22.0:1 vs 23.0:1) and slightly different power output. Parts like pistons and cylinder heads are generally interchangeable, but gasket kits and tune-up specs may vary; always verify with the EPC using the full engine serial number.
The F8M 720's primary reliability risk is cylinder head cracking, with elevated incidence in vehicles subjected to overheating or neglected coolant changes. Renault workshop data indicates this was a frequent cause of major engine repair in high-mileage examples, while owner reports consistently cite cooling system failures as the precursor. Maintaining the cooling system and avoiding aggressive driving when the engine is cold make preventative maintenance critical.
Analysis derived from Renault technical bulletins (1985-1996) and owner workshop data (1990-2005). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about RENAULT F8M-720.
Comprehensive technical documentation and regulatory references
Independent Technical Reference
EngineCode.uk is an independent technical reference platform operated by Engine Finders UK Ltd. We are not affiliated with RENAULT or any other manufacturer. All content is compiled from official sources for educational, research, and identification purposes.
Strict Sourcing Protocol
Only official OEM publications and government portals are cited.
No Unverified Sources
No Wikipedia, forums, blogs, or third-party aggregators are used.
Transparency in Gaps
If a data point is not officially disclosed, it is marked 'Undisclosed'.
Regulatory Stability
EU regulations are referenced using CELEX identifiers for long-term stability.
RENAULT 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.
Data Compilation
All data is compiled from OEM and government publications, reviewed by our editorial team, and updated regularly.
Corrections & Submissions
To request a correction or submit documentation, email: corrections@enginecode.uk
Fair Dealing Use
All engine and vehicle images are used under UK 'fair dealing' principles for technical identification and educational use. Rights remain with their respective owners.
Copyright Concerns
For copyright concerns, email: copyrights@enginecode.uk
GDPR Compliance
EngineCode.uk complies with UK GDPR. We do not collect personal data unless explicitly provided.
Data Requests
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.
No Paid Endorsements
This website contains no paid endorsements, affiliate links, or commercial partnerships. We do not sell parts or services.
Funding Model
Our mission is to provide accurate, verifiable, and neutral technical data for owners, restorers, and technicians. This site is self-funded.
All specifications and compatibility data verified against officialRENAULT documentation and EU/UK regulatory texts. Where official data is unavailable, entries are marked “Undisclosed“ .
All external links open in new tabs. Please verify current availability of resources.
