Honda F engine

The Honda F-Series engine was Honda's "big block" SOHC inline four, though lower production DOHC versions of the F-series were built. It features an aluminum open deck cast iron sleeved block and aluminum/magnesium cylinder head. Honda's F22B1 Engine won a spot on the Ward's 10 Best Engines List in 1995 and 1996.

OHC engines

F18A

This engine was used by Honda.

* Bore × Stroke: 85.0 × 81.0 mm
* Displacement: 1849 cc
* Valve Configuration: SOHC, 16 valves
* 118 bhp up to 1997
* 105PS @ 6000 rpm, 14.6 kg m @ 4000 rpm (PGM-carb)
* Fuel consumption : 13.0 km/l

F18B

This engine was used for the Honda Accord 1.8 VTS in Japan. Also found in the European Honda Accord Vtec S.

Specifications
* Bore × Stroke: 85.0 × 81.0 mm
* Displacement: 1849 cc
* Valve Configuration: SOHC, 16 valves, VTEC
* Compression ratio: 9.3:1
* Max power: 138PS (103 kW)
* Max torque: 124 ft·lbf (165 N m)

F20A

This engine series was used in the Honda Accords in Japan and Europe. The DOHC F20A was also derived from this engine "(see below)".

Specifications
* Bore × Stroke: 85.0 × 88.0 mm
* Displacement: 1997 cc
* Compression ratio : 9.5:1
* Valve Configuration: SOHC, 16 valves
* Max output : F20A2 and F20A4 110 PS @ 6000 rpm (PGM-carb) 133 PS @ 5400 rpm (PGM-Fi),
* Max output : F20A5 135 Ps @ 5400 rpm (PGM-Fi)
* Max output : F20A7 147 PS @ 5600 rpm (PGM-Fi)
* Max torque : F20A2 and F20A4 18.5 kg m @ 4300 rpm (PGM-Fi), 16.1 kg m @ 3800 rpm (PGM-carb)
* Max torque : F20A7 19.3 kg m @ 4400 rpm (PGM-Fi)
* Fuel consumption (Japan Combined Cycle) : 9.6 km/l (PGM-Fi), 9.8 km/l (PGM-carb)

This engine also spawned many variants, according to market, but the specs remain largely similar

F20B

This engine series was used in the CF4, CF5, CF9, CL3 Honda Accord and Honda Torneo from Japan. Also had a DOHC derivative "(see below)"

Specifications
* Bore × Stroke: 85.0 × 88.0 mm
* Displacement: 1997 cc
* Configuration Valve: DOHC, 16 valves, VTEC
* Compression ratio: 11.0:1
* Max power: 148 PS (109 kW) @ 6000 rpm (4WD), 150 PS (110 kW) @ 6000 rpm
* Max torque: 183 N m @ 5000 rpm (4WD), 186 N m @ 5000 rpm
*

F20Z

This engine series is similar to the F20A above, used in the Honda Accord in Asia and Europe.

Specifications
* Bore × Stroke: 85.0 × 88.0 mm
* Displacement: 1997 cc
* Valve Configuration: SOHC, 16 valves

F22A

This engine series was used in the Honda Accord and Honda Prelude S. Aside from differences in tuning, these engines are substantially similar.

Specifications
* Bore × Stroke: 85.0 × 95.0 mm
* Displacement: 2156 cc
* Valve Configuration: SOHC, 16 valves, Non vtec
* Compression ratio: 8.8:1
* Max power:
**F22A1: 125 hp (93 kW) @ 5200 rpm
**F22A4: 130 hp (97 kW) @ 5200 rpm
**F22A6: 140 hp (104 kW) @ 5600 rpm
**F22A7: 150 hp (110 kW) @ 5900 rpm (147hp/108kW with automatic transmission)
* Max torque:
**F22A1: 137 ft·lbf (186 N m) @ 4000 rpm
**F22A4: 142 ft·lbf (193 N m) @ 4000 rpm
**F22A6: 142 ft·lbf (193 N m) @ 4500 rpm
**F22A7: 145 ft·lbf (198 N m) @ 5000 rpm

F22B1

This engine was used in the Honda Accord EX and Acura CL 2.2. It was the first F engine to feature VTEC.

Specifications
* Bore × Stroke: 85.0 × 95.0 mm
* Displacement: 2156 cc
* Valve Configuration: SOHC, 16 valves, VTEC
* Compression ratio: 8.8:1
* Max power: 145 hp (108 kW) @ 5500 rpm
* Max torque: 147 ft·lbf (199 N m) @ 4500 rpm

F22B2

This engine was used in the 1994-1997 Honda Accord DX, LX and SE. The F22B6 in the 1995-1997 Honda Odyssey and the F22B8 in the Honda Shuttle are substantially similar.

Specifications
* Bore × Stroke: 85.0 × 95.0 mm
* Displacement: 2156 cc
* Valve Configuration: SOHC, 16 valves
* Compression ratio: 8.8:1
* Max power: 135 hp (97 kW) @ 5300 rpm
* Max torque: 139 ft·lbf (188 N m) @ 4200 rpm

The F22B in the BA9 Prelude had a DOHC configuration

JDM engines were stamped only as F22B.

F22Z2

This engine was used in the Honda Accord 2.2i.

Specifications
* Bore × Stroke: 85.0 × 95.0 mm
* Displacement: 2156 cc
* Valve Configuration: SOHC, 16 valves, VTEC
* Compression ratio: 9.3:1
* Max power: 150 hp (112 kW) @ 5500 rpm
* Max torque: 148 ft·lbf (200 Nm) @ 4500 rpm

F23A1

This engine was used in the Honda Accord EX, SE, and LX, and Acura 2.3CL in North America.

Specifications
* Bore × Stroke: 86.0 × 97.0 mm
* Displacement: 2254 cc
* Valve Configuration: SOHC, 16 valves, VTEC
* Compression ratio: 9.3:1
* Max power: 150 hp (112 kW) @ 5700 rpm
* Max torque: 152 ft·lbf (205 N m) @ 4900 rpm

The F23A4 is substantially similar, but features ULEV certification with a slight reduction of horsepower: 148 hp (110 kW) with a maximum torque of 148 ft·lbf (200 Nm). This engine has a different exhaust manifold and a 32-bit ECU which uses a wideband oxygen sensor.

The 1998 Honda Odyssey and the 1998-1999 Isuzu Oasis used the F23A7 engine, which was substantially similar to the F23A1.

F23A5

This engine was used in the 1998-2002 Honda Accord DX in North America.

Specifications
* Bore × Stroke: 86.0 × 97.0 mm
* Displacement: 2254 cc
* Valve Configuration: SOHC, 16 valves
* Compression ratio: 8.8:1
* Max power: 135 hp (100 kW) @ 5500 rpm
* Max torque: 153 ft·lbf (206 Nm) @ 4500 rpm

DOHC engines

F20A

This engine was used in the 1990-1993 CB3 and CB4Honda Accord 2.0Si and Si-T in Japan.

Specifications
* Bore × Stroke: 85.0 × 88.0 mm
* Displacement: 1997 cc
* Valve Configuration: DOHC, 16 valves
* Compression ratio: 9.5:1
* Max power: 150 hp (112 kW) @ 6100 rpm
* Max torque: 137 ft·lbf (186 Nm) @ 5000 rpm

F20B2

This engine was used in the 1997-2001 Honda Accord SiR and SiR-T (manual) in non-US countries. It uses a DOHC VTEC cylinder head similar to the H22A found in the Prelude but was designed to comply with many countries' sub-2.0 liter tax. The automatic transmission versions received the lower hp version, as it was tuned for more mid-range torque than its manual transmission counterpart.

Specifications
* Accord SiR wagon, SiR-T(Type-R) F20B 97-01 2.0L
* Valve train: 4 Cylinder, DOHC VTEC, 16 Valve
* Bore: 85.0mm
* Stroke: 88.0mm
* Displacement: 1997cc
* Torque: 144 LBS-FT @ 5500 RPM
* Horsepower: 200 HP @ 7000 RPM
* Red Line: 7200rpm
* Compression: 11.0:1
* Fuel Control: OBD-2

F20C

This engine was a radical departure from previous F engines, and only shared basic dimensions such as bore spacing. It was designed specifically for the Honda S2000 and shares some engineering with the Honda K engine. A long-stroke F22C1 variant was also produced.

F22B

This engine was used in the 1992-1996 Honda Prelude Si in Japan. It is similar to the H23A,.

Specifications
* 2.2L
* Bore × Stroke: 85.0 × 95.0 mm
* Displacement: 2156 cc
* Valve Configuration: DOHC, 16 valves
* Compression ratio: 9.3:1
* Max power: 166 hp (119 kW) @ 6000 rpm
* Max torque: 150 ft·lbf (200 N m) @ 5000 rpm