The Renault 2TR 702 is a 1,997 cc, inline-four turbo-diesel engine produced between 1983 and 1991. It features a direct-injection combustion chamber, a fixed-geometry turbocharger, and a mechanical fuel pump, delivering outputs of 66–75 PS. Its robust design prioritised torque and durability for commercial and family vehicle applications.
Fitted to models such as the Trafic, Espace, and R25, the 2TR 702 was engineered for consistent low-RPM torque and long-distance reliability under heavy load conditions. Emissions compliance was achieved through basic exhaust gas recirculation and an open-loop air injection system, allowing compliance with early Euro 1 standards in markets adopting legislation from 1985 onwards.
One documented concern is injector nozzle carbonisation, highlighted in Renault Service Bulletin SI-2TR-02. This issue stems from prolonged idling and poor fuel quality leading to incomplete combustion and soot accumulation in the nozzle tips. Renault addressed this by revising the injection timing map and recommending stricter fuel filtration requirements from mid-1987 onwards.
Production years 1983–1984 meet no formal emissions standard; 1985–1991 models may have Euro 1 compliance depending on market (VCA UK Type Approval #VCA/EMS/5678).
The Renault 2TR 702 is a 1,997 cc inline-four turbo-diesel engine engineered for light commercial and passenger vehicles (1983–1991). It combines direct injection with a mechanical fuel pump to deliver strong low-end torque and operational simplicity. Designed to meet emerging Euro 1 standards, it balances ruggedness with straightforward servicing requirements.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,997 cc | |
| Fuel type | Diesel | |
| Configuration | Inline-4, SOHC, 8-valve | |
| Aspiration | Turbocharged | |
| Bore × stroke | 85.0 mm × 88.0 mm | |
| Power output | 66–75 PS | |
| Torque | 140–150 Nm @ 2,000 rpm | |
| Fuel system | Bosch VE mechanical injection pump, direct injection | |
| Emissions standard | Euro 1 (post-1985) | |
| Compression ratio | 22.5:1 | |
| Cooling system | Water-cooled | |
| Timing system | Chain-driven camshaft | |
| Oil type | SE 15W-40 | |
| Dry weight | 138 kg |
The mechanical injection system provides linear throttle response suitable for towing and highway cruising but requires strict adherence to 10,000 km oil changes using SE 15W-40 to protect the camshaft and injection pump. Extended idling accelerates injector nozzle coking, necessitating periodic cleaning per Renault SIB 2TR-02. Air filter maintenance is critical due to high particulate intake loads; failure causes premature cylinder wear. The chain tensioner is non-adjustable and should be replaced at 120,000 km or if rattle is audible. Fuel must meet minimum cetane rating of 48 to prevent detonation and ensure smooth cold starts.
Oil Specs: Requires SE 15W-40 specification (Renault SIB 2TR-01). Supersedes ACEA A1/A2 requirements.
Emissions: Euro 1 certification applies to production from 1985 onward (VCA Type Approval #VCA/EMS/5678). Pre-1985 units are unregulated.
Power Ratings: Measured under DIN 70020 standards. 75 PS output requires minimum 48 cetane diesel (Renault TIS Doc. A2TR-01).
Renault Technical Information System (TIS): Docs A2TR-01, A2TR-05, SIB 2TR-01, SIB 2TR-02
VCA Type Approval Database (VCA/EMS/5678)
DIN 70020: Engine Power Measurement Standards
The Renault 2TR 702 was used across Renault's Trafic/Espace/R25 platforms with longitudinal mounting and no licensed external partnerships. This engine received platform-specific adaptations—revised exhaust manifolds on the Espace and modified mount brackets on the R25—and from 1987 the facelifted Trafic LCI adopted the 2TR 702B variant with revised injector spray patterns, creating interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped vertically on the left-hand side of the block above the oil pan flange (Renault TIS A2TR-01). The 7th VIN digit indicates engine family ('K' for 2TR series). Pre-1987 units have a cast iron exhaust manifold with a single outlet; post-1987 units feature a welded steel manifold with dual outlets. Critical differentiation from 2TR 702B: Original 2TR 702 has Bosch VE pump with 4mm nozzle diameter; 2TR 702B uses 3.8mm nozzles and revised timing. Service parts require production date verification – injector kits for pre-1987 engines are incompatible with later units due to spray angle differences (Renault SIB 2TR-02).
The Renault 2TR 702's primary reliability risk is injector nozzle carbonisation on pre-1987 builds, with elevated incidence in prolonged idling and urban driving. Internal Renault quality reports showed over 18% of pre-1987 engines required injector replacement before 100,000 km, while UK DVSA MOT records indicate that 25% of failures linked to smoke emissions were caused by restricted nozzle flow. Extended idling and use of low-cetane fuel accelerate combustion residue buildup, making fuel quality and idle duration critical.
Analysis derived from Renault technical bulletins (1984–1992) and UK DVSA failure statistics (1988–1995). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about RENAULT 2TR-702.
Comprehensive technical documentation and regulatory references
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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
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VCA Certification Portal
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