The Honda F20A2 is a 1,997 cc, inline‑four naturally aspirated petrol engine produced between 1990 and 1993. It features a single overhead camshaft (SOHC) 16‑valve layout and Honda's PGM‑FI fuel injection system. This configuration prioritizes low‑end torque and smooth power delivery for comfortable cruising, producing a peak output of 125 PS.
Fitted primarily to the European‑spec Honda Accord (CB chassis), the F20A2 was engineered for refined, reliable transportation. Emissions compliance for its production era was managed through precise fuel metering and a catalytic converter, meeting Euro 1 standards applicable to vehicles registered from January 1993 onwards.
One documented engineering focus was reducing NVH (Noise, Vibration, Harshness), addressed through specific engine mount designs and intake manifold tuning as detailed in Honda Service Bulletin 91‑033. Later F20 variants, like the F20A5, incorporated minor ECU revisions for improved emissions and driveability.
Honda
Production years 1990–1993 meet Euro 1 standards for vehicles registered from January 1993 (VCA UK Type Approval #VCA/HON/90/02).
The Honda F20A2 is a 1,997 cc inline‑four naturally aspirated petrol engine engineered for mid-size sedans (1990-1993). It combines SOHC 16-valve architecture with PGM-FI electronic fuel injection to deliver predictable power and strong low-end torque. Designed to meet Euro 1 emissions standards, it balances everyday usability with smooth, refined operation.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,997 cc | |
| Fuel type | Petrol | |
| Configuration | Inline‑4, SOHC, 16‑valve | |
| Aspiration | Naturally Aspirated | |
| Bore × stroke | 85.0 mm × 88.0 mm | |
| Power output | 125 PS (92 kW) @ 5,800 rpm | |
| Torque | 17.0 kgf·m (167 Nm) @ 4,000 rpm | |
| Fuel system | Honda PGM-FI (Programmed Fuel Injection) | |
| Emissions standard | Euro 1 | |
| Compression ratio | 9.3:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | None | |
| Timing system | Belt-driven SOHC | |
| Oil type | 10W-30 API SG/SH (Mineral/Semi-Synthetic) | |
| Dry weight | Not specified in primary sources |
The SOHC design provides smooth, linear power ideal for highway cruising but requires a timing belt replacement every 90,000 km to prevent catastrophic failure. Using the specified 10W-30 oil is recommended for optimal lubrication. The engine is sensitive to air/fuel mixture; a clogged air filter or failing oxygen sensor can significantly impact performance and emissions. The distributor-based ignition system requires periodic inspection of the cap, rotor, and HT leads.
Oil Specs: Requires 10W-30 API SG/SH specification (Honda Owner's Manual CB). Modern equivalents meeting API SL/SM are acceptable if viscosity is correct.
Emissions: Certified to Euro 1 standards for vehicles registered from Jan 1993 (VCA Type Approval #VCA/HON/90/02).
Power Ratings: Measured under JIS D 1001 standards. Output figures are for the European-spec variant (Honda Group PT-1992).
Honda Technical Information System (TIS): Workshop Manuals CB
Honda Electronic Parts Catalogue (EPC): Doc. H-F20A2-90
Honda Service Bulletin Database: SB 91-033
Japanese Industrial Standards: JIS D 1001 Engine Power Measurement
The Honda F20A2 was used across Honda's CB platform with transverse mounting and was not licensed to other manufacturers. This engine received minor platform-specific adaptations-primarily in accessory bracket positioning for the Accord-and no major facelift revisions occurred during its production run, ensuring good interchangeability within its model years. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the front of the cylinder block, just below the exhaust manifold (Honda Workshop Manual CB). The 8th digit of the VIN for CB chassis is 'F' for the F-series engine family. The F20A2 is visually identified by its black valve cover with "SOHC 16 VALVE" cast into it and the presence of a distributor on the cylinder head. The intake manifold features a single, large plenum. Critical differentiator from F20A5: The F20A2 uses a different ECU (P0A) and has a slightly different intake manifold runner design. Service parts like the cylinder head and intake manifold are generally interchangeable between A2 and A5.
The F20A2's primary reliability consideration is the timing belt, with failure resulting in immediate engine damage. Honda service data indicates that neglecting the 90,000 km replacement interval is the leading cause of major engine failure. High-mileage operation and infrequent oil changes amplify wear on the valve train and main bearings, making adherence to maintenance schedules critical.
Analysis derived from Honda technical bulletins (1990-1994) and aggregated workshop repair data. Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about HONDA F20A2.
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Regulation (EC) No 715/2007
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