Honda H Engine - DOHC Engines - H23

H23

The H23 was an increased-stroke, non-VTEC version of the H22, used in Japan, North America, and Europe. It shared the same Fiber Reinforced Metal (FRM) cylinder wall liners with the H22.

Specifications

• Bore × Stroke: 87.0 mm × 95.0 mm (3.43 in × 3.74 in)
• Displacement: 2,258 cc (137.8 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; 160 hp)
• Max torque: 156 lb·ft (212 N·m)
• Redline: 6500rpm
• Engine Control System: Honda Systems PGM-FI with port fuel injection
• Valve Gear: belt-driven dual overhead cams, 4 valves per cylinder

H23A

• Found in the Japanese 1992-1996 Ascot Innova 2.3Si-Z (2WS CC4 & 4WS CC5). It produces 165 PS (121 kW; 163 hp) & 156 lb·ft (212 N·m) and comes with a "black top".

H23A1

• Found in the American 4th gen Prelude Si (BB2). It produces 162 PS (119 kW; 160 hp) & 156 lb·ft (212 N·m) and comes with a "black top".
• Found in the American 1995 Prelude SE (BB2). It produces 162 PS (119 kW; 160 hp) & 156 lb·ft (212 N·m) and comes with a "black top".
• Found in the Canadian 4th gen Prelude SR (BB2). It produces 162 PS (119 kW; 160 hp) & 156 lb·ft (212 N·m) and comes with a "black top".
• Found in the Australian 4th gen Prelude Si (BB2). It produces 160 PS (118 kW; 158 hp) & 156 lb·ft (212 N·m) and comes with a "black top".
• Found in the Australian 1991-1993 Prelude SRS (BB2). It produces 160 PS (118 kW; 158 hp) & 156 lb·ft (212 N·m) and comes with a "black top".

H23A2

• Found in the European 4th gen Prelude 2.3i (BB2). It produces 160 PS (118 kW; 158 hp) & 154 lb·ft (209 N·m) and comes with a "black top".

H23A3

• Found in the European 1993-1995 Accord 2.3i SR (CC7). It produces 158 PS (116 kW; 156 hp) & 154 lb·ft (209 N·m) and comes with a "black top".
• Found in the European 1992-1996 Rover 623 SLi, GSi, and iS. It produces 158 PS (116 kW; 156 hp) & 154 lb·ft (209 N·m) and comes with a "black top".

H23A DOHC VTEC

In 1998, Honda of Japan produced a rare DOHC VTEC version of the H23A engine for use in Japan only. It has been factory modified with an internal oil passage in the H23A block to operate the VTEC solenoid in the H22A head. Having the same horsepower rating as the H22A engine but it has a lower redline because it has a longer stroke than H22A. H23A DOHC VTEC has 87mm x 95mm (bore and stroke)and the H22A DOHC VTEC has 87mm x 90.7mm (bore and stroke). The H23A DOHC VTEC Engine is largest displacement in the H Series engines with a compression ratio of 10.6:1.

• Found in the Japanese 1998-2002 Accord Wagon SiR (CH9). It produces 200 PS (147 kW; 197 hp) & 163 lb·ft (221 N·m) and comes with a "blue top".
• Found in the Japanese 1998-2002 Accord Wagon AWD (CL2). It produces 200 PS (147 kW; 197 hp) & 163 lb·ft (221 N·m) and comes with a "blue top".

Below is a chart that consists all of the engines in the H / F Series.

H Series Motor Specifications Chart 1

H Series Motor Specifications Chart 2

H Series Motor Specifications Chart 3