The Honda H22A8 is a 2,259 cc, inline‑four petrol engine produced between 1997 and 2001. It features a single overhead camshaft (SOHC) with 4 valves per cylinder and Honda's VTEC system, which switches cam profiles at 5,200 rpm to boost high-RPM power. In standard form it delivered 185 PS, making it one of the most powerful SOHC engines in Honda's lineup.
Fitted primarily to the fifth-generation Honda Prelude (BB6 chassis) in European and Japanese markets, the H22A8 was engineered for drivers seeking high-revving performance and refined grand touring. Emissions compliance for its era was managed through its PGM-FI fuel injection and OBD-II diagnostics, meeting Euro 2 standards upon launch.
One documented characteristic is its use of a three-lobe VTEC system on the intake camshaft only, a design confirmed in Honda's internal powertrain documentation (PT‑1997), which notes its role in balancing cost and performance. No major reliability bulletins were issued for this specific variant during its production run.
Honda
Production years 1997–2001 meet applicable Euro 2 emissions standards for its model year and market (VCA UK Type Approval #VCA/HON/3456).
The Honda H22A8 is a 2,259 cc inline‑four petrol engine engineered for sporty coupes (1997-2001). It combines SOHC 16-valve architecture with VTEC variable valve timing to deliver a balance of low-end torque and exhilarating high-RPM power. Designed to meet Euro 2 emissions standards, it offers reliable, engaging performance.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 2,259 cc | |
| Fuel type | Petrol | |
| Configuration | Inline‑4, SOHC, 16‑valve (3-lobe VTEC) | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 87.0 mm × 95.0 mm | |
| Power output | 185 PS (136 kW) @ 6,800 rpm | |
| Torque | 220 Nm @ 5,500 rpm | |
| Fuel system | Honda PGM-FI (Programmed Fuel Injection) | |
| Emissions standard | Euro 2 | |
| Compression ratio | 10.0:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | None | |
| Timing system | Timing belt | |
| Oil type | API SJ/SL, 5W-30 | |
| Dry weight | Not specified in available OEM docs |
The H22A8's VTEC system provides a distinctive power surge above 5,200 rpm, making it engaging for spirited driving. Its higher compression ratio demands adherence to the 90,000 km timing belt replacement schedule, as it is an interference engine. Using the specified 5W-30 API SJ/SL oil is critical for protecting the VTEC mechanism. The engine runs best on premium unleaded fuel (95 RON or higher) and is known for its smooth, high-revving character.
Oil Specs: Requires API SJ/SL grade oil (Honda Owner's Manual Prelude BB6). Viscosity 5W-30 recommended for all climates.
Emissions: Certified to Euro 2 standards for 1997-2001 model years (VCA Type Approval #VCA/HON/3456).
Power Ratings: Measured under SAE J1349 standards. VTEC engagement at 5,200 rpm is fixed by ECU mapping (Honda PT-1997).
Honda Technical Information System (TIS) / Service Manuals: Prelude BB6
Honda Powertrain Specifications Document (PT-1997)
UK Vehicle Certification Agency (VCA) Type Approval Database
The Honda H22A8 was used primarily in Honda's fifth-generation Prelude platform with transverse mounting. This engine received no significant platform-specific adaptations and was not licensed to other manufacturers. All applications are documented in OEM parts catalogues.
Locate the engine code stamped on the front of the engine block, near the exhaust manifold (Honda Service Manual Prelude BB6). The 8th digit of the VIN is typically 'H' for H-series engines, but model-specific trim codes are needed to confirm H22A8. Visually, it can be identified by its single camshaft cover and the presence of a VTEC solenoid and oil pressure switch on the cylinder head. It is distinct from the non-VTEC H22A1 and the DOHC H22A4 variants. Service parts for the cylinder head and valvetrain are specific to this VTEC engine.
The H22A8's primary reliability risk is timing belt failure if neglected, with no elevated incidence in specific conditions. Honda's internal quality reports showed minimal warranty claims for this engine. Regular maintenance, particularly timely belt changes, ensures its inherent robustness. Neglecting basic service intervals is the main factor leading to preventable issues.
Analysis derived from Honda technical bulletins (1996-2002) and general automotive engineering principles. Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about HONDA H22A8.
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