The Renault 840 725 is a 2,068 cc, inline‑four naturally aspirated diesel engine produced between 1990 and 1996. It features a SOHC 8‑valve design with indirect injection via a Bosch VE rotary pump, delivering outputs around 51 kW (69 PS) and 132 Nm of torque. Its robust, low‑revving character prioritised durability and fuel economy for light commercial and fleet applications.
Fitted primarily to the Renault Trafic I (X70) van and Master I (X60) van, the 840 725 was enginee…
Production years 1990–1996 meet Euro 1 standards for light commercial vehicles .
The Renault 840 725 is a 2,068 cc inline‑four naturally aspirated diesel engineered for light commercial vehicles (1990-1996). It combines indirect injection with a mechanically governed Bosch VE pump to deliver predictable, low-stress performance. Designed to meet Euro 1 standards, it prioritises mechanical simplicity and fuel economy over peak power.
| Parameter | Value | Source |
|---|---|---|
Displacement | 2,068 cc | |
Fuel type | Diesel | |
Configuration | Inline‑4, SOHC, 8‑valve | |
Aspiration | Naturally aspirated | |
Bore × stroke | 86.0 mm × 89.0 mm | |
Power output | 51 kW (69 PS) | |
Torque | 132 Nm @ 2,500 rpm | |
Fuel system | Bosch VE rotary injection pump | |
Emissions standard | Euro 1 (Light Commercial Vehicles) | |
Compression ratio | 22.0:1 | |
Cooling system | Water‑cooled | |
Turbocharger | None | |
Timing system | Chain‑driven | |
Oil type | Refer to vehicle handbook / manufacturer specification | |
Dry weight | 192 kg |
The Renault 840 725 was used across Renault's first-generation Trafic and Master platforms with longitudinal mounting. This engine received minimal platform-specific adaptations and no significant facelift revisions during its production run, ensuring broad parts interchangeability. All adaptations are documented in OEM technical bulletins.
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Field reports and technical service bulletins highlight component wear patterns under high-load operation. Adherence to manufacturer service intervals and approved fluid specifications is critical for long-term reliability.
Analysis derived from Renault technical bulletins (1990-1996) and general industry service data for this engine family. Repair procedures should follow manufacturer guidelines.
The most common questions about engine codes, what they mean, how to find them and how this database works
Yes, the 840 725 is renowned for its exceptional mechanical robustness and longevity when properly maintained. Its simple SOHC, naturally aspirated design is very low-stress. The main caveat is addressing injection pump bushing wear promptly. With regular oil changes and valve adjustments, these engines can easily exceed 400,000 km.
The most frequent issue is wear of the injection pump drive shaft bushing, leading to hard starting. Other common problems include glow plug or relay failures, cylinder head gasket leaks on high-mileage engines, and rear main seal oil leaks. These are well-documented in Renault service literature.
The 840 725 engine was used exclusively in Renault's first-generation commercial vehicles. It powered the Renault Trafic I (X70) van and the Renault Master I (X60) van from 1990 to 1996, badged as the 2.1 D.
Significant power gains are not practical. Minor adjustments to the Bosch VE pump's maximum fuel screw are possible but offer minimal benefit and risk over-fueling, which can damage the engine. The engine's internals and lack of forced induction are not designed for performance upgrades.
Fuel economy is excellent for its era and purpose due to its low power output and lack of turbocharger. In a Renault Trafic, expect real-world figures of approximately 7.5–8.5 L/100km (33–38 mpg UK) combined. The Master, being larger, will consume slightly more, around 8.5–9.5 L/100km (30–33 mpg UK) depending on load.
No. The Renault 840 725 is a non-interference (freewheeling) engine. If the timing chain were to fail, the pistons and valves would not collide, preventing catastrophic internal damage. This is a key factor in its reputation for durability.
Renault specifies an oil meeting ACEA B2 standards, typically a 15W-40 mineral grade. This provides adequate protection for the engine under load. Regular changes every 10,000 km or 12 months are crucial for longevity, especially given the engine's age.
Comprehensive technical documentation and regulatory references
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Regulatory Stability
EU regulations are referenced using CELEX identifiers for long-term stability.
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
Type-approval guidance and documentation.
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