The Renault J7R 740 is a 2,165 cc, inline‑four petrol engine produced between 1985 and 1992. It features a cast‑iron block, aluminium head, and a single overhead camshaft (SOHC) with two valves per cylinder. Output varied by application but typically ranged from 83 kW (113 PS) to 88 kW (120 PS), with torque figures around 172–180 Nm.
Fitted primarily to the R21 and early Safrane models, the J7R 740 was engineered for robust, dependable performance in executive sedans and estates. It prioritised low‑end torque and smooth cruising over outright power, making it well‑suited for highway driving and load‑carrying. Emissions compliance for its era was managed through carburetion or basic fuel injection systems.
One documented concern is premature wear of the camshaft and rocker arms, particularly if oil changes are neglected. This issue, referenced in Renault technical bulletins, is often linked to the engine's design and the importance of consistent lubrication. The J7R series was eventually superseded by the more modern F-series engines.
Production years 1985–1992 predate the Euro 1 standard (1992). Emissions compliance is based on national regulations in effect at time of manufacture (VCA UK Type Approval historical records).
The Renault J7R 740 is a 2,165 cc inline‑four petrol engine engineered for executive sedans and estates (1985-1992). It combines a robust cast‑iron block with SOHC valvetrain to deliver dependable, torque‑focused performance. Designed for pre‑Euro emissions standards, it balances mechanical simplicity with everyday drivability.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 2,165 cc | |
| Fuel type | Petrol | |
| Configuration | Inline‑4, SOHC, 8‑valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 88.0 mm × 89.0 mm | |
| Power output | 83–88 kW (113–120 PS) | |
| Torque | 172–180 Nm @ 3,500 rpm | |
| Fuel system | Carburetor or single‑point injection | |
| Emissions standard | Pre‑Euro (National Standards) | |
| Compression ratio | 9.0:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | None | |
| Timing system | Chain‑driven camshaft | |
| Oil type | Mineral 15W‑40 or 10W‑40 | |
| Dry weight | Not specified in available OEM docs |
The SOHC design offers mechanical simplicity but requires diligent 10,000 km oil changes to prevent camshaft and rocker wear. Using a quality mineral or semi-synthetic 10W-40/15W-40 oil is critical for maintaining lubrication on the valvetrain. The engine is known for its torquey, unstressed character, ideal for relaxed cruising. Its age means parts like carburetors or early injection components may need specialist attention. The timing chain is generally robust but should be inspected if unusual noise develops.
Oil Specs: Recommends mineral 10W-40 or 15W-40 (Renault Tech. Manual 77 11 198 545). Modern semi-synthetics meeting ACEA A3 are acceptable.
Emissions: Pre-dates Euro standards. Compliance based on national regulations circa 1985-1992 (VCA Historical Records).
Power Ratings: Measured under DIN 70020 standards. Output varies slightly by carburetor/injection type and model year (Renault PT-1990).
Renault Technical Information System: Manual 77 11 198 545
Renault EPC (Electronic Parts Catalogue) Reference: J7R
UK Vehicle Certification Agency (VCA) Historical Database
Renault Group Powertrain Specifications (PT-1990 Archive)
The Renault J7R 740 was used across Renault's R21 platform with longitudinal mounting. This engine received platform-specific adaptations-different intake manifolds and engine mounts for sedan, estate, and Nevada variants. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on a flat pad on the front face of the cylinder block, near the gearbox flange. The full code (e.g., J7R 740) will be present. The 8th digit of the VIN typically corresponds to the engine code for Renault vehicles of this era. Visually, it is a large, cast-iron inline-4 engine. Differentiate from the smaller J6R (1.8L) by displacement and from the F-series by the SOHC (single cam cover) design versus DOHC. Carbureted versions have a prominent carburetor atop the intake manifold, while injected versions have a throttle body and fuel rail.
The J7R 740's primary reliability risk is camshaft and rocker arm wear, with elevated incidence in high-mileage examples or those with poor maintenance history. Renault workshop data indicates this is a known wear item, while owner club surveys frequently cite it as a major service cost. Infrequent oil changes and use of incorrect oil viscosity make adherence to the service schedule critical.
Analysis derived from Renault technical bulletins (1985-1995) and owner club technical archives (1990-2020). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about RENAULT J7R-740.
Comprehensive technical documentation and regulatory references
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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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