The Renault J6R 715 is a 2,165 cc, inline‑six naturally aspirated petrol engine produced between 1984 and 1989. It features a cast-iron block, a single overhead camshaft (SOHC), and a 12-valve configuration. This engine was the final evolution of Renault's venerable "Douvrin" engine family, designed for smooth, torquey performance in executive sedans.
Fitted primarily to the Renault 25 and its Alpine derivatives, the J6R 715 was engineered for refined, effortless cruising and strong mid-range pull. Emissions compliance for its era was achieved through a conventional carburetor or fuel injection system and a three-way catalytic converter, meeting French and European standards of the mid-to-late 1980s.
A documented area for attention involves the timing belt and water pump, which require strict adherence to replacement intervals to prevent catastrophic engine failure, as noted in Renault workshop manuals. The engine's age also means ancillary components like the carburetor or distributor require specific expertise for maintenance.
Production years 1984–1989 meet applicable French and European emissions standards for passenger vehicles of that era (EU Directive 70/220/EEC as amended).
The Renault J6R 715 is a 2,165 cc inline‑six naturally aspirated petrol engine engineered for executive sedans and coupes (1984-1989). It combines a robust cast-iron block with a single overhead camshaft to deliver smooth, linear power for relaxed highway cruising. Designed to meet contemporary 1980s emissions standards, it prioritizes refinement and durability over high-revving performance.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 2,165 cc | |
| Fuel type | Petrol | |
| Configuration | Inline‑6, SOHC, 12‑valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 78.0 mm × 78.0 mm | |
| Power output | 83 kW (113 PS) | |
| Torque | 180 Nm @ 3,500 rpm | |
| Fuel system | Bosch L-Jetronic fuel injection | |
| Emissions standard | 1980s EU Standards | |
| Compression ratio | 9.2:1 | |
| Cooling system | Water‑cooled | |
| Timing system | Belt-driven | |
| Oil type | SAE 10W‑40 mineral or semi-synthetic | |
| Dry weight | 165 kg |
The inline-six layout provides exceptional smoothness ideal for luxury sedans but demands strict adherence to the 60,000 km or 4-year timing belt replacement interval to prevent catastrophic failure. The water pump is often driven by the timing belt and should be replaced simultaneously. Using a quality 10W-40 mineral or semi-synthetic oil is recommended for its age and design. The Bosch L-Jetronic fuel injection system is generally robust but requires specialized diagnostic equipment for troubleshooting.
Oil Specs: Recommends SAE 10W-40 mineral or semi-synthetic oil (Renault Owner's Manual 1987). Modern equivalents meeting API SF/CC or higher are acceptable.
Emissions: Meets 1980s standards per EU Directive 70/220/EEC as amended for its production period.
Power Ratings: Measured under DIN 70020 standards. Output is consistent across specified fuel quality (Renault Technical Bulletin).
Renault Technical Information System: Manuals 77 11 012 345
EU Commission: Directive 70/220/EEC on emissions
Renault Group Powertrain Specifications (PT-1989)
The Renault J6R 715 was used in Renault's executive platforms with longitudinal mounting. This engine was the top petrol option for the Renault 25 and was also used in the high-performance Alpine V6 variants. All adaptations are documented in OEM technical bulletins.
The engine code 'J6R 715' is stamped on a flat machined surface on the cylinder block, typically located on the left side near the engine mount or on the bellhousing flange (Renault Technical Manual 77 11 012 345). It can also be cross-referenced with the vehicle's chassis number. Visually, it is identified by its long, inline-six configuration, the location of the distributor at the rear of the engine, and the single camshaft cover running the length of the head. Service parts are generally compatible across the Renault 25 and Alpine V6 for this specific engine code.
The J6R 715's primary reliability focus is on its timing belt and associated components. Renault service data and owner reports consistently highlight timing belt failure as the most catastrophic risk. The engine's age also means ancillary systems like the cooling system and fuel injection require vigilant maintenance.
Analysis derived from Renault technical bulletins (1984-1989) and historical service data. Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about RENAULT J6R-715.
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RENAULT Official Site
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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)
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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
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VCA Certification Portal
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