The Fiat 146 A2.146 is a 1,411 cc inline — four petrol engine produced between 1987 and 1993. It served as the base powerplant for the Fiat Tipo (Type 160) and subsequent 146 — series hatchback, delivering 55–62 kW (75–84 PS) depending on application. Equipped with a single overhead camshaft (SOHC), 8 — valve head, and single or twin — choke carburettor (Weber 32/34 IDF or 34 DMTR), it offered improved fuel efficiency and smoother operation over previous Fiat four — cylinder un…
All A2.146-equipped Fiat 146 models comply with ECE Regulation 15 Phase II .
The Fiat A2.146 is a 1,411 cc inline-four SOHC petrol engine designed for compact hatchbacks (1987–1993). It combines carburettor-based fuel delivery with an aluminium cylinder head and belt-driven camshaft to deliver improved efficiency and reduced weight. Designed to meet ECE R15 Phase II standards, it balances economy with serviceability for everyday motoring.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,411 cc | |
Fuel type | Petrol | |
Configuration | Inline-4, SOHC, 8-valve | |
Aspiration | Naturally aspirated | |
Bore × stroke | 76.0 mm × 78.0 mm | |
Power output | 55–62 kW (75–84 PS) | |
Torque | 108–114 Nm @ 3,000 rpm | |
Fuel system | Single/dual carburettor (Weber 32/34 IDF or 34 DMTR) | |
Emissions standard | ECE R15 Phase II | |
Compression ratio | 9.2:1 | |
Cooling system | Water-cooled | |
Turbocharger | Not applicable | |
Timing system | Belt-driven camshaft | |
Oil type | Refer to vehicle handbook / manufacturer specification | |
Dry weight | 118 kg |
The Fiat A2.146 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 34 DMTR in 146 S trims—and from 1989, 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 (1987-1993) and UK DVSA historic vehicle inspection data (2010-2023). Repair procedures should follow manufacturer guidelines.
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Yes, when properly maintained. The A2.146 features an aluminium head and proven SOHC design, making it durable over time. Early models (pre-1989) may show EGR or carburettor issues, but post-1989 revisions improved reliability. Regular oil changes with correct 10W-40 mineral oil and strict timing belt replacement are essential for long-term operation.
Common issues include timing belt failure, carburettor mixture drift, EGR valve clogging, and oil leaks from gaskets. These are documented in Fiat service literature and observed in historic vehicle inspections. Adhering to 12,000 km belt replacement and using ethanol-resistant carburettor parts can mitigate many concerns.
The A2.146 was used exclusively in the Fiat Tipo (160), Regata, and 146 range from 1987 to 1993. It powered the base 1.4L, EL, and 1.4 S trims. No other Fiat platforms used this engine, and it was not licensed to other manufacturers.
Yes, within mechanical limits. The 1.4 S variant already features a high-output tune with Weber 34 DMTR carburettor for 62 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 1.4L, fuel consumption averages ~9.2 L/100km (city) and ~6.4 L/100km (highway), or approximately 31 mpg UK combined. The 1.4 S model, with higher compression and twin carburettors, may consume 10–15% more fuel under spirited driving.
No. The A2.146 uses a non-interference valve train design. If the timing belt 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 flat-tappet 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 12,000 km or annually.
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DVLA: Engine Changes & MoT
Official guidance on engine swaps and inspection implications.
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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.
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