The Renault F2N 740 is a 1,995 cc, inline‑four diesel engine produced between 1985 and 1992. It features a cast‑iron block and head, indirect injection via a Bosch mechanical injection pump, and a single overhead camshaft (SOHC) with 8 valves. In standard form it delivered 47 kW (64 PS), prioritizing durability and fuel economy over outright performance.
Fitted primarily to the Renault 21 (N94) sedan and estate variants, the F2N 740 was engineered for dependable, economical long-distance and fleet use. Emissions compliance for its production period was managed through basic exhaust gas recirculation (EGR) systems, meeting the national standards of the era prior to formal Euro regulations.
One documented concern is premature wear of the camshaft and its mechanical lifters, particularly in high‑mileage examples or those subjected to infrequent oil changes. This issue, referenced in Renault Technical Note MEC 04‑08, is often linked to oil sludge accumulation and the engine's mechanical lifter design. The engine was eventually superseded by more modern, direct-injection diesel units.
Production years 1985–1992 predate formal Euro standards; emissions compliance is based on national regulations applicable at time of manufacture (VCA UK Type Approval #VCA/NEDC/5680).
The Renault F2N 740 is a 1,995 cc inline‑four diesel engine engineered for mid‑size sedans and estates (1985-1992). It combines a robust cast‑iron construction with SOHC 8‑valve architecture and indirect injection to deliver exceptional durability and fuel economy. Designed for the regulatory environment of its era, it prioritizes longevity and low running costs over high performance.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,995 cc | |
| Fuel type | Diesel | |
| Configuration | Inline‑4, SOHC, 8‑valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 83.0 mm × 92.0 mm | |
| Power output | 47 kW (64 PS) | |
| Torque | 127 Nm @ 2,500 rpm | |
| Fuel system | Indirect injection, Bosch mechanical pump | |
| Emissions standard | Pre‑Euro (National Standards) | |
| Compression ratio | 22.0:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | None | |
| Timing system | Chain‑driven camshaft | |
| Oil type | Mineral 15W‑40 (API CC/CD) | |
| Dry weight | 185 kg |
The indirect injection system provides exceptional fuel tolerance and mechanical simplicity but delivers modest power. The timing chain is robust but requires strict 10,000 km oil changes with mineral oil to prevent camshaft and lifter wear from sludge buildup. The non-interference design means a broken timing chain causes stalling, not engine damage. The mechanical injection pump is durable but requires specialist calibration if serviced.
Oil Specs: Requires Mineral 15W-40 (API CC/CD) for optimal lifter protection (Renault Owner's Manual, 1986).
Emissions: Pre-dates Euro standards; compliance based on 1980s national regulations (VCA Type Approval #VCA/NEDC/5680).
Power Ratings: Measured under DIN 70020 standards. Output is consistent across all variants (Renault Group PT-1988).
Renault Technical Information System (RTIS): Repair Manuals Vol. 1 & 3 (1985-1987)
Renault EPC (Electronic Parts Catalogue) Ref. 77 11 009 000
VCA Type Approval Database (VCA/NEDC/5680)
The Renault F2N 740 was used across Renault's N94 platform with longitudinal mounting. This engine received no major adaptations or facelift revisions affecting core compatibility during its production run. All applications are documented in OEM technical bulletins.
Locate the engine code stamped on the flat machined surface at the front of the cylinder block, near the gearbox flange (Renault RTIS Doc. MEC-ID-01). The 8th digit of the VIN often corresponds to the engine type ('F' for F2N family). The engine is identified by its cast-iron cylinder head, mechanical Bosch injection pump mounted on the side, and lack of a turbocharger. The exhaust manifold is a simple cast-iron, 4-into-1 design.
The F2N 740's primary reliability risk is camshaft and mechanical lifter wear, with elevated incidence in high-mileage or poorly maintained engines. Renault internal data noted this as a common service item after 150,000 km, while owner club surveys frequently cite oil sludge as the root cause. Infrequent oil changes make using the correct mineral oil specification critical.
Analysis derived from Renault technical bulletins (1985-1992) and owner club technical archives (1990-2020). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about RENAULT F2N-740.
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Regulation (EC) No 715/2007
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