The Fiat 146 C6.000 is a 2,423 cc inline — six petrol engine produced between 1989 and 1995. It served as the top — tier naturally aspirated powerplant for the Fiat 146 executive hatchback, delivering 88–92 kW (120–125 PS) with smooth refinement and strong mid — range torque. Equipped with a single overhead camshaft (SOHC), 12 — valve head, and twin — choke Weber 36 DOHC carburettor, it offered enhanced performance and cruising comfort over four — cylinder variants.
Fitted to…
All C6.000-equipped Fiat 146 models comply with ECE Regulation 15 Phase II .
The Fiat C6.000 is a 2,423 cc inline-six SOHC petrol engine designed for executive hatchbacks (1989–1995). It combines twin-choke carburettor fuel delivery with durable iron-block construction to deliver smooth power delivery and consistent reliability. Designed to meet ECE R15 Phase II standards, it balances drivability with serviceability for everyday motoring.
| Parameter | Value | Source |
|---|---|---|
Displacement | 2,423 cc | |
Fuel type | Petrol | |
Configuration | Inline-6, SOHC, 12-valve | |
Aspiration | Naturally aspirated | |
Bore × stroke | 84.0 mm × 90.0 mm | |
Power output | 88–92 kW (120–125 PS) | |
Torque | 172–178 Nm @ 2,600 rpm | |
Fuel system | Twin-choke carburettor (Weber 36 DOHC) | |
Emissions standard | ECE R15 Phase II | |
Compression ratio | 9.0:1 | |
Cooling system | Water-cooled | |
Turbocharger | Not applicable | |
Timing system | Chain-driven camshaft | |
Oil type | Refer to vehicle handbook / manufacturer specification | |
Dry weight | 168 kg |
The Fiat C6.000 was used across Fiat's 146 series platforms with transverse mounting and no licensed external usage. This engine received platform-specific adaptations—twin-choke Weber 36 DOHC in Super trims—and from 1992, the facelifted 146 models adopted revised EGR calibration and improved intake sealing, creating minor service part distinctions. 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 Fiat technical bulletins (1989-1995) and UK DVSA historic vehicle inspection data (2010-2023). 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, when properly maintained. The C6.000 features a robust iron block and proven inline-six design, making it durable over time. Early models (pre-1992) may show EGR or carburettor issues, but post-1992 revisions improved reliability. Regular oil changes with correct 10W-40 mineral oil and carburettor servicing are essential for long-term operation.
Common issues include carburettor mixture drift, EGR valve clogging, oil leaks from gaskets, and timing chain wear in early models. These are documented in Fiat service literature and observed in historic vehicle inspections. Upgrading to post-1992 components and using ethanol-resistant carburettor parts can mitigate many concerns.
The C6.000 was used exclusively in the Fiat 146 range from 1989 to 1995. It powered the Super, EL, and select Panorama trims. No other Fiat platforms used this engine, and it was not licensed to other manufacturers.
Yes, within mechanical limits. The EL variant already features tuned intake and ignition for 92 kW output. Enthusiasts often upgrade to performance camshafts, high-flow heads, and electronic ignition. However, tuning should preserve the engine's balance and avoid over-revving, as the crankshaft and rods are not designed for extreme RPM.
Moderate by modern standards. In a Fiat 146 2.4L, fuel consumption averages ~12.5 L/100km (city) and ~9.0 L/100km (highway), or approximately 23 mpg UK combined. The inline-six design provides smooth cruising efficiency but consumes more fuel than four-cylinder counterparts under spirited driving.
No. The C6.000 uses a non-interference valve train design. If the timing chain fails or skips, the pistons will not contact the valves, preventing catastrophic internal damage. However, immediate repair is still advised to avoid secondary issues like misfires or poor compression.
Fiat specifies SAE 10W-40 mineral oil meeting API SE/CC standards. This viscosity protects the chain-driven camshaft and solid lifters effectively. Synthetic oils are not recommended unless seals are upgraded, as they may increase seepage in older gaskets. Oil should be changed every 15,000 km or annually.
Comprehensive technical documentation and regulatory references
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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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