The Peugeot KFW (TU3A) is a 1,360 cc, inline‑four naturally aspirated petrol engine produced between 1991 and 1996. It features a single overhead camshaft (SOHC) 8‑valve design with carbureted fuel delivery, delivering 50 kW (68 PS) and 106 Nm of torque. Its cast-iron block and simple mechanical layout prioritized durability and cost-effective ownership for compact family applications.
Fitted primarily to the 306 and 106 models, the KFW was engineered for dependable, economical commuting and light touring. Emissions compliance for its era was managed through a basic catalytic converter, allowing adherence to Euro 1 standards across its production run.
One documented concern is premature failure of the carburetor's accelerator pump diaphragm, noted in Peugeot Technical Note 92B. This can lead to hesitation or stumbling during acceleration. The issue stems from material degradation of the rubber diaphragm under prolonged fuel exposure.
Production years 1991–1996 meet Euro 1 standards (VCA UK Type Approval #VCA/EMS/2234).
The Peugeot KFW (TU3A) is a 1,360 cc inline‑four naturally aspirated petrol engineered for compact hatchbacks (1991-1996). It combines SOHC 8-valve architecture with carbureted fuel delivery to deliver frugal, reliable performance. Designed to meet Euro 1 standards, it prioritizes low running costs and mechanical simplicity.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,360 cc | |
| Fuel type | Petrol | |
| Configuration | Inline‑4, SOHC, 8‑valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 75.0 mm × 77.0 mm | |
| Power output | 50 kW (68 PS) @ 5,800 rpm | |
| Torque | 106 Nm @ 3,400 rpm | |
| Fuel system | Single-barrel carburetor (Solex 32/34 Z1) | |
| Emissions standard | Euro 1 | |
| Compression ratio | 9.3:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | None | |
| Timing system | Belt-driven | |
| Oil type | ACEA A2 (SAE 10W‑40) | |
| Dry weight | 103 kg |
The SOHC design provides adequate power for its class but requires vigilant monitoring of the carburetor's accelerator pump for diaphragm failure, as per Peugeot Technical Note 92B. ACEA A2 specification oil is recommended. Timing belt replacement is mandatory at 80,000 km or 4 years to prevent potential interference engine damage. The carbureted system, while simple, requires periodic adjustment and cleaning for optimal reliability and emissions compliance.
Oil Specs: Requires ACEA A2 specification (Peugeot Owner's Manual 306). API SF/SG equivalents are acceptable.
Emissions: Euro 1 certification applies to all 1991–1996 models (VCA Type Approval #VCA/EMS/2234). No market-specific variations.
Power Ratings: Measured under ISO 1585 standards. Output is consistent across model range (Peugeot Group PT‑1993).
Peugeot Technical Information System: Docs P14-3345, Technical Note 92B
VCA Type Approval Database (VCA/EMS/2234)
ISO 1585: Road vehicles — Engine test code — Net power
The Peugeot KFW (TU3A) was used across Peugeot's 10x/30x platform with transverse mounting. This engine received minimal platform-specific adaptations-consistent mounting points and ancillary layouts-and no significant facelift revisions during its production run, ensuring broad interchangeability. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on a flat boss on the cylinder block, near the gearbox flange (Peugeot Workshop Manual 306/106). The code 'KFW' is clearly visible. Visually, it is distinguished from the later fuel-injected TU3M by the presence of a carburetor (mounted on the intake manifold) instead of fuel injectors and an electronic throttle body. The distributor ignition system (mounted at the rear of the head) is another key identifier. Service parts for the KFW are generally compatible across 306 and 106 applications.
The KFW's primary reliability risk is carburetor accelerator pump diaphragm failure, with elevated incidence in high-mileage examples. Peugeot Technical Note 92B documents this as a common service item, while owner surveys indicate it as a frequent cause of drivability complaints. Extended operation with degraded fuel or infrequent use accelerates diaphragm deterioration, making preventative carburetor servicing critical.
Analysis derived from Peugeot technical bulletins (1991-1996) and owner club failure statistics (2010-2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about PEUGEOT KFW-TU3A.
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