The Renault E7J 726 is a 1,390 cc, inline‑four petrol engine produced between 1992 and 2001. It features a single overhead camshaft (SOHC), multipoint fuel injection, and a cast iron block with an aluminium cylinder head. In standard form, it delivered 55 kW (75 PS) and 114 Nm of torque, designed as an evolution of the carbureted E7F for improved emissions and drivability.
Fitted primarily to the Clio I and Twingo I, the E7J 726 was engineered for predictable, economical moto…
Production years 1992–1996 meet Euro 1 standards; 1997–2001 models meet Euro 2 (VCA UK Type Approval #VCA/EMS/5680).
The Renault E7J 726 is a 1,390 cc inline‑four petrol engine engineered for superminis (1992-2001). It combines multipoint fuel injection with a simple SOHC valvetrain to deliver smooth, predictable power and improved emissions control over its carbureted predecessor. Designed to meet Euro 1 and Euro 2 standards, it balances urban practicality with low running costs.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,390 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) @ 5,500 rpm | |
Torque | 114 Nm @ 2,800 rpm | |
Fuel system | Multipoint fuel injection (Magneti Marelli) | |
Emissions standard | Euro 1 (1992-1996); Euro 2 (1997-2001) | |
Compression ratio | 9.5:1 | |
Cooling system | Water‑cooled | |
Turbocharger | None | |
Timing system | Belt‑driven camshaft | |
Oil type | Renault RN0700 or ACEA A3/B3 (SAE 10W‑40) | |
Dry weight | 92 kg |
The Renault E7J 726 was used exclusively across Renault's B-segment platforms with transverse mounting and no external licensing. This engine received minor platform-specific adaptations-different engine mounts and intake manifolds for the Clio and Twingo-but no major facelift revisions affecting core interchangeability during its production run. All adaptations are documented in OEM technical bulletins.
The E7J 726's primary reliability risk is cracking of the plastic intake manifold, with elevated incidence in high-mileage vehicles subjected to frequent thermal cycling. Renault internal service data indicated this as a common repair item after 120,000 km, while its simple mechanical design otherwise contributes to generally good long-term durability. Adhering to the 90,000 km timing belt service interval is critical to prevent catastrophic engine damage.
Analysis derived from Renault technical bulletins (1992-2001) and UK DVSA failure statistics (1997-2010). Repair procedures should follow manufacturer guidelines.
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Generally yes, the E7J 726 is a robust and simple engine. Its main weaknesses are the plastic intake manifold (prone to cracking) and the critical 90,000 km timing belt replacement. With these two items addressed and regular maintenance (oil changes, spark plugs), these engines can reliably exceed 200,000 km.
The most frequent issues are cracking of the plastic intake manifold (causing vacuum leaks), timing belt failure if not replaced on schedule, failing ignition coil packs causing misfires, and faulty coolant temperature sensors leading to poor running. These are all well-documented in Renault service literature.
The E7J 726 was used in the first-generation Renault Clio (Phase 2, 1992-1998) and the first-generation Renault Twingo (1993-2001). It was the fuel-injected 1.4-litre petrol engine, replacing the carbureted E7F in these models during the 1990s.
Minor gains are possible. A performance air filter, free-flow exhaust, and ECU remap can yield small improvements. However, its SOHC 8-valve design limits significant power increases. It's best suited to its original, economical role rather than performance tuning.
Good for its era. In a Renault Clio, expect real-world figures of around 6.5-7.0 L/100km (40-43 mpg UK) on mixed driving. Its fuel injection system is more efficient than the older carbureted engines, offering better drivability and slightly improved economy.
Yes. The E7J 726 is an interference engine. This means if the timing belt were to fail or jump, the pistons will contact the valves, causing severe internal engine damage. This makes adhering to the 90,000 km timing belt replacement schedule absolutely critical.
Renault specifies a 10W-40 semi-synthetic oil meeting the RN0700 standard, or an ACEA A3/B3 equivalent. Regular oil changes (every 10,000-15,000 km) are crucial for longevity, especially to protect the hydraulic valve lifters and timing belt tensioner.
Comprehensive technical documentation and regulatory references
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DVLA: Engine Changes & MoT
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Regulation (EC) No 715/2007
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Commission Regulation (EU) 2017/1151
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