Honda G engine

This article incorporates information from the equivalent article on the Japanese Wikipedia.

See also: Straight-five engine

Honda G engine

The Honda G series engine is a slanted inline 5 cylinder gasoline engine, originally used in the 1989 Honda Vigor, Honda Rafaga, Honda Ascot and Honda Inspire. It carried over to the Vigor's successor the Acura 2.5TL, which ran from 1995-1998, in North America, and the Honda Saber in Japan.

Some people colloquially refer to an F-Series block (found in Accords) with an H-Series head (found in Preludes) as a "G series" engine. This combination of an Accord bottom end with a Prelude head has nothing in common with the actual G-series engine. The engine is longitudinally mounted and resembles an F-Series single cam engine (found in early Accords) with an extra cylinder on it and a shorter stroke.

Specifications

• Type: In-line 5 cylinder, aluminum block and head
• Valve Configuration: SOHC, with 4 valves per cylinder

G20A

• Displacement: 1,996 cc (121.8 cu in)
• Bore: 82.0 mm (3.23 in)
• Stroke: 85.6 mm (3.37 in)
• Compression ratio: 9.3:1
• Max Power: 114 kW (155.0 PS; 152.9 bhp) @ 6700 rpm
• Max Torque: 19.0 kg·m (186 N·m; 137 lb·ft) @ 4000 rpm

Found in the 1989-1991 JDM Inspire/Vigor (CB5), 1992-1994 JDM Inspire/Vigor 20 (CC3), 1993-1997 JDM Ascot/Rafaga 2.0 (CE4), and 1995-1997 JDM Inspire/Saber 20 (UA1).

G25A

• Displacement: 2,451 cc (149.6 cu in)
• Bore: 85.0 mm (3.35 in)
• Stroke: 86.4 mm (3.40 in)
• Compression ratio: 9.3:1
• Max Power: 140 kW (190.3 PS; 187.7 bhp) @ 6500 rpm
• Max Torque: 24.2 kg·m (237 N·m; 175 lb·ft) @3800 rpm
• Redline: 6800 rpm
• Fuel Cutoff: 7100 rpm

Found in the 1992-1994 JDM Inspire/Vigor 25 (CC2), 1993-1997 Ascot/Rafaga 2.5S (CE5), and 1995-1997 JDM Inspire/Saber 25 (UA2).

G25A1

• Compression ratio: 9.0:1

Found in the 1992-1994 USDM & CDM Acura Vigor (CC2).

G25A4

• Compression ratio: 9.6:1

Found in the 1995-1998 USDM & CDM Acura 2.5TL (UA2).

References

• Official Honda Inspire site（Japanese）
• Fact Book G20A（Japanese）