The Fiat 8140.67 is a 2,500 cc, inline‑four turbo‑diesel engine produced between 1991 and 1998. It features indirect injection, a fixed — geometry turbocharger, and a single overhead camshaft (SOHC) valvetrain. This robust unit was designed for commercial durability, delivering 92 kW (125 PS) and 285 Nm of torque for dependable load — carrying performance.
Fitted primarily to the Ducato van (Type 244) Maxi variants and its derivatives, the 8140.67 was engineered for hi…
Production years 1991–1998 meet Euro 1 standards .
The Fiat 8140.67 is a 2,500 cc inline‑four turbo‑diesel engineered for light commercial vehicles (1991-1998). It combines indirect injection with a fixed-geometry turbocharger to deliver strong low-end pull and mechanical simplicity. Designed to meet Euro 1 standards, it prioritizes serviceability and cost-effective operation for high-mileage use.
| Parameter | Value | Source |
|---|---|---|
Displacement | 2,500 cc | |
Fuel type | Diesel | |
Configuration | Inline‑4, SOHC, 8‑valve | |
Aspiration | Turbocharged | |
Bore × stroke | 93.0 mm × 92.0 mm | |
Power output | 92 kW (125 PS) @ 4,200 rpm | |
Torque | 285 Nm @ 2,400 rpm | |
Fuel system | Indirect injection (Bosch VE rotary pump) | |
Emissions standard | Euro 1 | |
Compression ratio | 22.0:1 | |
Cooling system | Water‑cooled | |
Turbocharger | Fixed-geometry turbo (KKK or IHI) | |
Timing system | Chain-driven | |
Oil type | Refer to vehicle handbook / manufacturer specification | |
Dry weight | 255 kg |
The Fiat 8140.67 was used across Fiat's light commercial platforms with longitudinal mounting. This engine received platform-specific adaptations-reinforced engine mounts and cooling system upgrades in the Ducato Maxi-and was also supplied to Alfa Romeo for their AR6 Maxi van. 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 manufacturer technical service bulletins and industry workshop records. Repair procedures should follow manufacturer guidelines.
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The 8140.67 is renowned for its mechanical robustness and longevity in commercial use, often exceeding 300,000 km. Its main weakness is the cylinder head, which can crack if the engine overheats. With a revised head fitted and diligent cooling system maintenance, it can be an extremely reliable workhorse.
The most critical issue is cylinder head cracking. Other common problems include turbocharger bearing/seal failure, wear in the Bosch VE injection pump leading to leaks or poor running, and glow plug system faults causing cold-start difficulties. These are well-documented in Fiat service literature.
The 8140.67 was primarily used in the second-generation Fiat Ducato Maxi (Type 244) vans and chassis cabs from 1991 to 1998. It was also found in badge-engineered Maxi versions: the Peugeot J5 Maxi, Citroën C25 Maxi, and the Alfa Romeo AR6 Maxi van during the same period.
Minor power gains are possible by adjusting the Bosch VE pump's maximum fuel screw, but this is not recommended. The engine and turbo were not designed for significant increases. Over-fueling can lead to excessive heat, accelerated wear, and premature failure of the head or turbo. Reliability should be prioritized over power.
Fuel economy is modest by modern standards. In a typical Ducato Maxi van, expect around 11.0-12.5 L/100km (22-25 mpg UK) combined, depending on load, driving style, and vehicle condition. Its indirect injection system prioritizes durability and torque over ultimate efficiency.
No. The Fiat 8140.67 is a non-interference engine. This means that if the timing chain were to fail or jump, the pistons will not contact the valves. While this prevents catastrophic internal damage, a broken chain will still leave you stranded and require repair.
Fiat recommends an ACEA B3 or B4 specification diesel engine oil. A 15W-40 viscosity is standard for most operating conditions. Using a high-quality oil and changing it every 10,000 km (or as per the vehicle's service schedule) is crucial for protecting the turbocharger and ensuring long engine life.
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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