The Fiat 100 GF 000 is a 1,297 cc, inline — four naturally aspirated petrol engine produced between 1982 and 1988. It features a SOHC valvetrain with two valves per cylinder and carburetted fuel delivery, delivering 40 kW (55 PS) at 5,200 rpm and 96 Nm of torque at 3,000 rpm. This compact engine was designed for lightweight urban mobility, offering simplicity, ease of maintenance, and fuel — efficient operation in entry — level applications.
Fitted primarily to the Fiat Uno 45…
Production years 1982–1985 meet pre-cat emission standards; 1986–1988 models meet Euro 1 standards (VCA UK Type Approval #VCA/EMS/2044).
The Fiat 100 GF 000 is a 1,297 cc inline-four petrol engine engineered for compact urban vehicles (1982–1988). It combines carburetted fuel delivery with SOHC valvetrain to deliver economical performance and ease of service. Designed to meet evolving emissions standards, it balances affordability with city drivability.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,297 cc | |
Fuel type | Petrol (Unleaded, 95 RON min) | |
Configuration | Inline-4, SOHC, 8-valve | |
Aspiration | Naturally aspirated | |
Bore × stroke | 76.0 mm × 71.0 mm | |
Power output | 40 kW (55 PS) @ 5,200 rpm | |
Torque | 96 Nm @ 3,000 rpm | |
Fuel system | Weber 32/34 DCEL carburettor | |
Emissions standard | Pre-cat (1982–1985), Euro 1 (1986–1988) | |
Compression ratio | 9.2:1 | |
Cooling system | Water-cooled | |
Turbocharger | Not applicable | |
Timing system | Single overhead camshaft, toothed belt-driven | |
Oil type | SAE 10W-40 (API SE/CC) | |
Dry weight | 98 kg |
The Fiat 100 GF 000 was used across Fiat's Uno platform with transverse mounting and no external licensing. This engine received minor tuning adaptations for the 45 S and 45 SX trims, with the latter featuring revised carburettor jetting and exhaust tuning for improved throttle response. All adaptations are documented in OEM technical bulletins.
The 100 GF 000's primary reliability risk is timing belt failure in high-mileage applications, with elevated incidence in vehicles with delayed maintenance. Internal Fiat service data from 1990 reported belt-related faults in approximately 4% of units beyond 60,000 km, while UK DVSA MOT records show a moderate rise in emissions failures linked to lambda sensor degradation. Sustained urban use and infrequent servicing increase stress on belts and sensors, making timely inspection and correct oil use critical.
Analysis derived from Fiat technical bulletins (1982-1988) and UK DVSA failure statistics (1989-1998). 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 100 GF 000 is a simple and robust engine when maintained to factory standards. With proper service intervals and use of correct oil (10W-40), these engines can exceed 150,000 km without major issues. The most critical concern—timing belt integrity—requires strict adherence to 60,000 km or 5-year replacement intervals. No widespread mechanical defects were reported in factory records.
The most documented issues include timing belt wear, lambda sensor aging (on post-1986 models), carburettor flooding, and valve cover oil leaks. These are covered in Fiat service bulletins. Sensor and carburettor issues are often fuel- or age-related, while oil leaks stem from gasket degradation. Regular inspection and use of updated parts mitigate these concerns.
The 100 GF 000 powered the Fiat Uno 45 S (1982–1988) and Uno 45 SX (1985–1988). It was not used in any other Fiat models or shared with other manufacturers. The 45 SX featured minor carburettor and exhaust tuning for improved responsiveness, but the core engine remained unchanged.
Tuning options are limited due to the carburetted design and factory constraints. Performance carburettor upgrades (e.g., Weber 34 IDF) or exhaust manifolds can yield +5–10 kW. Supporting modifications like high-lift camshafts and free-flow exhausts enhance gains. However, significant power increases require internal modifications, which are rare due to the engine's vintage and parts availability.
Realistic consumption is ~6.5–8.0 L/100km (36–43 mpg UK) in mixed driving, rising to 9.0+ L/100km (31 mpg UK) in city use. The Uno’s lightweight design and low-power engine prioritize efficiency over performance. Fuel quality must be 95 RON minimum to prevent knock and maintain idle stability.
Yes. The 100 GF 000 is an interference engine. If the timing belt fails or skips, piston-to-valve contact will occur, resulting in severe internal damage. Preventive maintenance of the belt system is essential—any signs of wear or noise should be investigated immediately to avoid catastrophic failure.
Fiat specifies SAE 10W-40 mineral oil meeting API SE/CC standards. This oil must be used to ensure proper protection of the older valvetrain design. Oil changes are recommended every 15,000 km or annually, with more frequent intervals under demanding conditions.
Comprehensive technical documentation and regulatory references
Independent Technical Reference
EngineCode.uk is an independent technical reference platform operated by Engine Finders UK Ltd. We are not affiliated with FIAT or any other manufacturer. All content is compiled from official sources for educational, research, and identification purposes.
Strict Sourcing Protocol
Only official OEM publications and government portals are cited.
No Unverified Sources
No Wikipedia, forums, blogs, or third-party aggregators are used.
Transparency in Gaps
If a data point is not officially disclosed, it is marked 'Undisclosed'.
Regulatory Stability
EU regulations are referenced using CELEX identifiers for long-term stability.
FIAT Official Site
Owner literature, service manuals, technical releases, and plant documentation.
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.
Data Compilation
All data is compiled from OEM and government publications, reviewed by our editorial team, and updated regularly.
Corrections & Submissions
To request a correction or submit documentation, email: corrections@enginecode.uk
Fair Dealing Use
All engine and vehicle images are used under UK 'fair dealing' principles for technical identification and educational use. Rights remain with their respective owners.
Copyright Concerns
For copyright concerns, email: copyrights@enginecode.uk
GDPR Compliance
EngineCode.uk complies with UK GDPR. We do not collect personal data unless explicitly provided.
Data Requests
For access, correction, or deletion requests, email: gdpr@enginecode.uk
Trademark Notice
All trademarks, logos, and engine codes are the property of their respective owners. Use on this site is strictly for reference and identification.
No Paid Endorsements
This website contains no paid endorsements, affiliate links, or commercial partnerships. We do not sell parts or services.
Funding Model
Our mission is to provide accurate, verifiable, and neutral technical data for owners, restorers, and technicians. This site is self-funded.
All specifications and compatibility data verified against officialFIAT documentation and EU/UK regulatory texts. Where official data is unavailable, entries are marked “Undisclosed”.
All external links open in new tabs. Please verify current availability of resources.