The Renault B1B 707 is a 1,397 cc, inline‑four naturally aspirated petrol engine produced between 1985 and 1996. It features a single overhead camshaft (SOHC) design with two valves per cylinder and a carbureted fuel system in early variants, later transitioning to single — point injection. In standard form, it delivered approximately 55 kW (75 PS), providing adequate performance for its lightweight supermini applications.
Fitted primarily to the Renault 5 (Supercin…
Production years 1985–1992 meet pre-Euro standards; 1993–1996 models meet Euro 1 standards .
The Renault B1B 707 is a 1,397 cc inline‑four naturally aspirated petrol engine engineered for supermini applications (1985-1996). It combines a simple SOHC valvetrain with carburetion or single-point injection to deliver reliable, economical performance. Designed to meet pre-Euro and later Euro 1 standards, it prioritizes serviceability and low running costs.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,397 cc | |
Fuel type | Petrol | |
Configuration | Inline‑4, SOHC, 8‑valve | |
Aspiration | Naturally aspirated | |
Bore × stroke | 75.8 mm × 77.0 mm | |
Power output | 55 kW (75 PS) | |
Torque | 105 Nm @ 3,500 rpm | |
Fuel system | Carburetor / Single-point injection (SPI) | |
Emissions standard | Pre-Euro (1985–1992); Euro 1 (1993–1996) | |
Compression ratio | 9.5:1 | |
Cooling system | Water‑cooled | |
Turbocharger | None | |
Timing system | Belt‑driven camshaft | |
Oil type | API SG/CC (e.g., SAE 15W‑40) | |
Dry weight | Not specified in available OEM docs |
The Renault B1B 707 was used across Renault's Supercinq platform with transverse mounting. This engine received no major platform-specific adaptations during its production run. All applications 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 Renault technical bulletins (1985-1996) and historical service data. 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 B1B 707 is fundamentally simple and robust, making it potentially very reliable long-term. Its Achilles' heel is the timing belt tensioner. With strict adherence to the 80,000 km/4-year belt and tensioner replacement schedule, these engines can easily surpass 200,000 km. Neglecting this interval is the primary cause of catastrophic engine failure.
The most critical problem is timing belt tensioner pulley failure, which can destroy the engine if ignored. Other common issues include carburetor maladjustment or SPI idle control valve failure causing running problems, ignition system component wear leading to misfires, and coolant leaks from aging hoses or the water pump.
The B1B 707 engine was used in the Renault 5 (Supercinq) from 1985 to 1996 and the Renault Express van from 1986 to 1993. It was the standard 1.4L petrol engine for these models throughout their production runs.
Minor tuning is possible but yields limited gains due to the engine's SOHC, 8-valve design. Options include fitting a performance carburetor or throttle body, a free-flow exhaust, and a modified camshaft. Significant power increases are not practical or cost-effective; the engine is best suited to its original economy-focused role.
Fuel economy is good for its era. Expect approximately 6.5-7.5 L/100km (38-43 mpg UK) in combined driving for a Renault 5. Real-world figures are heavily influenced by driving style, vehicle condition, and whether the engine is carbureted or uses single-point injection. SPI models are generally slightly more economical.
Yes. The B1B 707 is an interference engine. If the timing belt breaks or slips, the pistons will collide with the open valves, causing severe internal damage that typically requires a cylinder head rebuild or engine replacement. This makes the 80,000 km/4-year belt and tensioner change interval absolutely critical.
Renault specifies an oil meeting API SG/CC standards. A good quality 15W-40 mineral oil is perfectly adequate and was the standard recommendation for this engine. There is no need for synthetic oil, as the engine operates at relatively low stresses and temperatures.
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.