Honda H engine

The Honda H engine was Honda's high-performance engine family from the 1990s and early 2000s. It is largely derived from the Honda F engine with which it shares many design features. Like Honda's other 4-cylinder families of the 80s and 90s, it was replaced by the Honda K engine. The primary applications of the H engine series were the fourth- and fifth-generation Honda Prelude, and the fifth- and sixth-generation Honda Accord. It has also enjoyed some success as a racing engine, forming the basis of Honda's Touring car racing engines for many years, and being installed in lightweight chassis (such as the Honda CRX) for use in drag racing. The F20B, though technically coded part of the F-series family of engines, was basically a destroked version of the H22A. It was developed for Honda to be able to enter into the 2-liter class in racing.

DOHC engines

H22A

The H22A debuted in 1993 for use in the Honda Prelude VTEC as the H22A1. Versions of the H22A would be the Prelude's signature high-performance engine worldwide until the end of Prelude production in 2001. It was also used in the 1994–1997 Honda Accord SiR and 1998–2003 Honda Accord Euro-R in Japan and Accord Type-R in the UK and Europe(however different cams and a different intake manifold were used in the Euro R H22A). The H22A in the Prelude Type-S, CH6 Type-R and CL1 Euro-R came with the trademark red crinkle finish valve cover. Transmissions between all Honda F series motors are interchangeable(with the exception of the F20c and F22c, S2000 motors)

Specifications
* Bore × Stroke: 87.0 × convert|90.70|mm|in|abbr=on
* Displacement: 2157 cc (132 cu. in.)
* Valve Configuration: DOHC, 16 valves, VTEC
* Type: In-line 4 cylinder, aluminum block and head
* Compression ratio: 10.0:1 (North America); 10.6–11.0:1 (Japan)
* Max power: Auto PS|190|0 (CD6 Accord); 200 PS (BB1/4/6 Prelude SiR's); 220 PS (Euro-R & Prelude Type-S) ;A7 212 bhp DIN (Type-R)(142–164 kW)
* Max torque: 156–167 ft·lbf (207–217 Nm)
* Redline: 7600 rpm
* Rev Cut: 7800 rpm
* Engine Control System: Honda Systems PGM-FI with port fuel injection
* Valve Gear: Belt-driven dual overhead cams, 4 valves per cylinder, variable timing and lift
* 92-96 versions use closed-deck blocks with FRM liners. 97-01 versions used open-deck blocks with iron liners

H22A4
* The H22A4 is the designation of the engine used in the Base and Type-SH 97-01 Honda Prelude. This engine was only released in the US in all their models, and these are designated with the "black tops".

H22A5
* The H22A5 could be found in European Prelude VTi with "black top" and only 185 horsepower

H22A7
* The H22A7 could be found in European Accord Type-R.

H22A8
* This motor was only released within the European versions of the Prelude and can be designated with the "red tops".

H23A1

The H23A1 was an increased-stroke, non-VTEC version of the H22a, designed for the North American and UK market 1992–1996 Honda Prelude Si. It shared the same Fiber Reinforced Metal (FRM) cylinder wall liners with the H22a.

Specifications
* Bore x Stroke: 87.0 x convert|95.0|mm|in|abbr=on
* Displacement: 2258 cc (138 cu. in.)
* Valve Configuration: DOHC, 16 valves
* Type: In-line 4 cylinder, aluminum block and head
* Compression ratio: 9.8:1
* Max power: 160 hp (119 kW)
* Max torque: 163ft·lbf (207 Nm)
* Redline: 6500 rpm
* Engine Control System: Honda Systems PGM-FI with port fuel injection
* Valve Gear: belt-driven dual overhead cams, 4 valves per cylinder

There is also a DOHC VTEC version of the H23A, available in the CH6 and CL2(4WD) accord (CF4 wagon) SiR in the European Markets.

Specs remain largely similar to the H23A for North America, albeit differ in the introduction of VTEC mechanism and more power

Specifications
* Compression ratio: 10.6:1
* Max output : Auto PS|200|0 @ 6800 rpm
* Max torque : convert|220|Nm|ftlbf|abbr=on @ 5300 rpm
* Redline: 6500 rpm