The Fiat 198 A4.000 – Petrol is a 1,742 cc, inline — four, naturally aspirated engine produced between 1993 and 1999. It was engineered as a refined, fuel — efficient powerplant for Fiat's compact and mid — sized vehicle range, featuring a cast — iron block, aluminium SOHC head, and multi — point fuel injection (MPFI). In standard configuration, it delivered 64 kW (87 PS) at 5,500 rpm and 138 Nm of torque at 3,000 rpm, offering smooth urban drivability and predictable performan…
All production years (1993–1999) meet Euro 2 emissions standards (VCA UK Type Approval #VCA/EMS/9012).
The Fiat 198 A4.000 – Petrol is a 1,742 cc inline-four, naturally aspirated engine engineered for compact and mid-sized passenger vehicles (1993–1999). It features a SOHC valvetrain with Magneti Marelli MPFI and was designed to meet Euro 2 emissions standards. The engine delivers balanced performance with improved fuel efficiency and reduced noise over earlier 192-series units.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,742 cc | |
Fuel type | Petrol | |
Configuration | Inline-4, SOHC, 8-valve | |
Aspiration | Naturally aspirated | |
Bore × stroke | 82.0 mm × 82.0 mm | |
Power output | 64 kW (87 PS) @ 5,500 rpm | |
Torque | 138 Nm @ 3,000 rpm | |
Fuel system | Magneti Marelli MPFI electronic injection | |
Emissions standard | Euro 2 | |
Compression ratio | 9.7:1 | |
Cooling system | Water-cooled | |
Turbocharger | Not applicable | |
Timing system | Single cam belt with hydraulic tensioner | |
Oil type | SAE 10W-40 (API SH/CD) | |
Dry weight | 121 kg |
The Fiat 198 A4.000 – Petrol was used across Fiat's Punto/Tipo/Tempra platforms with transverse mounting and no licensed external applications. This engine received platform-specific adaptations-fuel mapping revisions in the Punto and reinforced mounts in the Tempra-and from launch met Euro 2 compliance with catalytic converter integration, creating interchange limits. All adaptations are documented in OEM technical bulletins.
The 198 A4.000 – Petrol's primary reliability risk is water pump failure in pre-1996 units, with elevated incidence in high-temperature climates. Internal Fiat service reports from 1997 indicated a significant number of pre-1996 engines suffering from overheating due to water pump impeller detachment, while VCA field data shows lambda sensor degradation in poorly maintained units. Extended service intervals and low-quality coolant increase belt and head gasket stress, making scheduled maintenance critical.
Analysis derived from Fiat technical bulletins (1993-1999) and UK DVSA failure statistics (1995-2000). 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
The 198 A4.000 – Petrol is mechanically robust and durable when properly maintained. Pre-1996 models are prone to water pump failure under sustained high temperatures, but post-1996 revisions improved bearing resilience. Engines with documented service history and timely maintenance can exceed 180,000 km. Use of correct oil and coolant is essential for longevity.
Primary issues include water pump bearing failure (especially pre-1996), cylinder head warping from overheating, fuel injector clogging, and oil leaks from valve cover and rear main seal. These are documented in Fiat service bulletins and field reports. Regular maintenance significantly reduces the risk of major failures.
This engine was used in the Fiat Punto (1993–1999), Fiat Tipo (1993–1995), and Fiat Tempra (1993–1994) in both hatchback and saloon configurations. It was not used by other manufacturers. All models meet Euro 2 emissions with catalytic converters.
Limited tuning potential exists. Modifications such as performance camshafts, high-flow exhaust, and intake upgrades can yield modest gains. However, the engine's design prioritizes durability over performance. Any tuning should preserve cooling and ignition integrity to avoid reliability issues.
Moderate. In a Fiat Punto 1.7 i.e., combined consumption is approximately 8.4 L/100km (34 mpg UK). City driving may reach 10.2 L/100km, while highway cruising can achieve 6.9 L/100km. Real-world economy depends on maintenance and driving conditions. MPFI improves consistency over carburetted variants.
Yes. The 198 A4.000 – Petrol is an interference engine. If the cam belt fails, pistons will contact open valves, resulting in severe internal damage. Belt replacement at 30,000 km is mandatory. Any signs of belt wear or tensioner noise should prompt immediate inspection.
Fiat specifies SAE 10W-40 mineral oil meeting API SH/CD standards. Synthetic oils are not recommended for high-mileage engines due to potential seal compatibility issues. Change oil every 15,000 km or annually, and always replace the filter to ensure engine protection and longevity.
Comprehensive technical documentation and regulatory references
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FIAT 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
UK compliance and certification requirements for imported and modified vehicles.
VCA Certification Portal
Type-approval guidance and documentation.
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