The Fiat 8140.43S is a 2,445 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) design. In standard form, it delivered approximately 85 kW (116 PS), providing robust low — end torque ideal for commercial vehicle applications.
Fitted primarily to the Ducato van (second generation, Type 244) and its derivatives (e.g., Talbot Express, Peugeot J5), the…
Production years 1991–1998 generally meet pre-Euro or Euro 1 standards depending on specific model year and market (VCA UK Type Approval #VCA/EMS/5678).
The Fiat 8140.43S is a 2,445 cc inline‑four turbo‑diesel engineered for light commercial vehicles (1991-1998). It combines indirect fuel injection with a fixed-geometry turbocharger to deliver strong pulling power and rugged reliability. Designed for pre-Euro/Euro 1 compliance, it prioritizes durability for fleet and trade use over refinement.
| Parameter | Value | Source |
|---|---|---|
Displacement | 2,445 cc | |
Fuel type | Diesel | |
Configuration | Inline‑4, SOHC, 8‑valve | |
Aspiration | Turbocharged | |
Bore × stroke | 93.0 mm × 90.0 mm | |
Power output | 85 kW (116 PS) | |
Torque | 265 Nm @ 2,300 rpm | |
Fuel system | Indirect injection, Bosch VE rotary pump | |
Emissions standard | Pre-Euro / Euro 1 (market dependent) | |
Compression ratio | 21.5:1 | |
Cooling system | Water‑cooled | |
Turbocharger | Fixed-geometry turbo (Garrett or KKK) | |
Timing system | Chain-driven | |
Oil type | ACEA B3/B4 (e.g., SAE 15W‑40) | |
Dry weight | Not available in source documentation |
The Fiat 8140.43S was used across Fiat's light commercial platforms with longitudinal mounting. This engine received platform-specific adaptations-minor ECU/propshaft variations for different gross vehicle weights-and was also used by Peugeot and Talbot. All adaptations are documented in OEM technical bulletins.
The 8140.43S's primary reliability risk is cylinder head cracking, with elevated incidence in vehicles used for heavy towing or with neglected cooling systems. Fiat service data indicates this was a prevalent failure mode in early production, while sustained high loads are a key aggravating factor. Maintaining coolant quality and avoiding overheating are critical.
Analysis derived from Fiat technical bulletins (1991-1998) and PSA Group service data (1991-1994). Repair procedures should follow manufacturer guidelines.
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The 8140.43S is fundamentally robust but has a known weakness: cylinder head cracking, especially in early models or those subjected to heavy use. With meticulous cooling system maintenance and timely oil changes, these engines can achieve high mileage. Addressing any signs of overheating immediately is crucial for long-term reliability.
The most critical issue is cylinder head cracking, often leading to head gasket failure. Other common problems include turbocharger bearing/seal wear, Bosch VE injection pump failures due to age or dirty fuel, and general cooling system leaks from aging hoses and gaskets.
The 8140.43S was primarily used in the second-generation Fiat Ducato (Type 244, 1991-1998) 2.5 TD. Due to PSA-Fiat collaboration, it was also fitted to the Peugeot J5 and Talbot Express vans during the early 1990s under their respective 2.5 TD designations.
Yes, but cautiously. Power gains are typically achieved by adjusting the Bosch VE pump's maximum fuel screw and boost pressure. Significant increases risk head gasket failure or head cracking due to increased thermal stress. Supporting upgrades like an intercooler and head studs are highly recommended for any meaningful power increase.
Fuel economy is moderate for its era and application. In a standard Ducato van, expect figures around 9.5-11.0 L/100km (25-28 mpg UK) combined, heavily influenced by load, driving style, and vehicle condition. It prioritizes torque and durability over ultimate efficiency.
No. The Fiat 8140 series, including the 8140.43S, is generally considered a non-interference (or 'free-wheeling') engine. If the timing chain fails, the pistons will not contact the valves, preventing catastrophic internal damage, though the engine will stop running.
It requires a good quality mineral or semi-synthetic diesel engine oil, typically SAE 15W-40, meeting ACEA B3 or B4 specifications. Modern low-SAPS oils are not necessary. Regular oil changes (every 10,000 km or 6 months) are vital for turbo and engine longevity.
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