The Renault J7T 760 is a 2,068 cc, inline‑four turbo‑diesel engine produced between 1987 and 1992. It features a cast iron block, indirect injection via pre-chambers, and a single overhead camshaft (SOHC) design. Output was typically 66 kW (90 PS), delivering improved power over earlier variants while retaining strong low-end torque characteristic of its technology.
Fitted primarily to the Renault 25 TDE and Alpine V6 Turbo Diesel models, the J7T 760 was engineered to offer enhanced performance for executive and sports applications. Emissions compliance for its production period was managed through mechanical injection and exhaust aftertreatment suitable for prevailing standards of the late 1980s.
One documented concern is premature failure of the vacuum-operated turbocharger wastegate actuator, which can lead to overboost conditions. This issue, referenced in Renault technical service notes, is often attributed to diaphragm degradation from heat and age. The engine represented the final evolution of the indirect-injection J7T series before being superseded.
Production years 1987–1992 meet applicable French and EU emissions standards for passenger vehicles of that era (UTAC Type Approval).
The Renault J7T 760 is a 2,068 cc inline‑four turbo‑diesel engineered for executive and sports coupes (1987-1992). It combines indirect injection with a KKK turbocharger to deliver enhanced power and strong low-rpm torque. Designed to meet late-1980s emissions standards, it prioritized performance within the constraints of its mechanical injection system.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 2,068 cc | |
| Fuel type | Diesel | |
| Configuration | Inline‑4, SOHC, 8‑valve | |
| Aspiration | Turbocharged | |
| Bore × stroke | 88.0 mm × 85.0 mm | |
| Power output | 66 kW (90 PS) | |
| Torque | 185 Nm @ 2,500 rpm | |
| Fuel system | Bosch VE rotary injection pump, indirect injection (pre-chamber) | |
| Emissions standard | Late 1980s EU standards | |
| Compression ratio | 21.0:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | KKK K14 with vacuum actuator | |
| Timing system | Chain‑driven SOHC | |
| Oil type | Mineral 15W‑40 (API CC/CD) | |
| Dry weight | Not specified in available documentation |
The turbocharged indirect injection provides strong pulling power ideal for spirited driving but requires vigilant monitoring of the vacuum-operated wastegate to prevent overboost. Regular oil changes (every 7,500–10,000 km) with quality mineral oil are critical for longevity. The mechanical injection pump needs precise timing adjustment; neglect can lead to poor running or excessive smoke. Valve clearance checks are mandatory as the mechanical lifters are not self-adjusting.
Oil Specs: Requires API CC/CD specification mineral oil (Renault Service Manual 60B). Modern oils meeting ACEA B3 may be used if compatible with older seals.
Emissions: Compliance based on French UTAC approvals for model years 1987-1992. Specific Euro standard designation not applicable for this era.
Power Ratings: Measured under DIN 70020 standards. Output is consistent across documented variants (Renault Group PT‑1990).
Renault Service Manual 60B (J7T Engine)
Renault Technical Note TN-J7T
Union Technique de l'Automobile, du motocycle et du Cycle (UTAC) Type Approval Archives
Renault EPC (Electronic Parts Catalogue)
The Renault J7T 760 was used across Renault's R25 and Alpine platforms with longitudinal mounting. This engine received platform-specific adaptations-different turbo plumbing and ancillary layouts for the saloon versus the coupe-and no significant facelift revisions occurred during its production, maintaining broad interchangeability. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the flat machined surface on the left side of the engine block, near the rear of the cylinder head (Renault Service Manual 60B). The code will read "J7T 7xx" where "xx" denotes the specific sub-variant (e.g., 760). Visually, it is a four-cylinder engine with a prominent KKK turbocharger mounted at the front. The indirect injection system can be identified by the Bosch VE injection pump on the side of the engine. Differentiate from the J7T 707 by its application in higher-spec models and potentially higher boost pressure.
The J7T 760's primary reliability risk is turbocharger wastegate actuator failure, with elevated incidence in high-mileage or heat-soaked examples. Renault technical notes indicate this was a recognized service issue, while owner club data suggests injection pump and cooling system issues are also common on aged vehicles. Preventative maintenance and using correct oil make adherence to service schedules critical.
Analysis derived from Renault technical bulletins (1987-1992) and aggregated owner club maintenance data (1990-2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about RENAULT J7T-760.
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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)
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
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