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A cylinder head from a Honda K20Z3. Components of the i-VTEC system can be seen.

The Honda K series engine is a four-cylinder otto cycle engine introduced in 2001. It is available in 2.0 L and 2.4 L naturally-aspirated variants, and a 2.3 L turbocharged model.

The K series engines are equipped with DOHC valvetrains and use roller rockers to reduce friction. The engines use a coil on plug, distributorless ignition system with a coil for each spark plug. This system eliminates the need for spark plug wires as well as the problems associated with them. It also allows the ECU to precisely control the ignition timing based on various sensor inputs. The cylinders have cast iron sleeves similar to the B-series engines, as opposed to the FRM cylinders found in the H-series.

Two versions of Honda's i-VTEC system can be found on K series engines, variable timing control (VTC) can be found on the intake cam of both versions. The VTEC system on engines like the K20A3 only operate on the intake cam, at low RPM only one intake valve is fully opened, the other opening just slightly to create a swirl effect in the combustion chamber for improved fuel atomization. At high rpm both intake valves open fully to improve engine breathing. In engines such as the K20A2 found in the Acura RSX Type-S the VTEC system operates on both the intake and exhaust valves, allowing both to benefit from multiple cam profiles.

[edit] K Series

[edit] K20

[edit] K20A

K20A

Bore is 86 mm & Stroke is 86 mm for all of the K20 engines.

• Found in:
  • 2007- Honda Civic Type-R (FD2)
    • Displacement: 1998 cc
    • Compression: 11.7:1
    • Power: 225 bhp (225 PS, 165 kW) @ 8000 rpm
    • Torque: 158 ft·lbf (215 N·m) @ 7000 rpm
    • Redline: 8600  rpm
  • 2001-2006 Honda Civic Type-R (EP3)
    • Displacement: 1998 cc
    • Compression: 11.5:1
    • Power: 212 bhp (218 PS, 158 kW) @ 8000 rpm
    • Torque: 149 ft·lbf (202 N·m) @ 7000 rpm
    • Redline: 8600 rpm
  • 2001-2007 Honda Integra Type-R (DC5)
    • Displacement: 1998 cc
    • Compression: 11.5:1
    • Power: 217bhp (220 PS, 162 kW) @ 8000 rpm
    • Torque: 152 ft·lbf (206 N·m) @ 7000 rpm
    • Redline: 8600 rpm
    • I-VTEC Engagement: 6200rpm
  • 2003-2007 Honda Accord Euro-R
    • Displacement: 1998 cc
    • Compression: 11.5:1
    • Power: 217 bhp (220 PS, 162 kW) @ 8000 rpm
    • Torque: 152 f·lbf (206 N·m) @ 7000 rpm
    • Redline: 8800 rpm

[edit] K20A2

• Found in:
  • 2002-2004 Acura RSX Type-S and 2002-2005 Honda Civic Type R (EP3, European)
    • Displacement: 1998 cc
    • Compression: 11.0:1
    • Power: 200ps/197hp (147kW) @ 7400rpm
    • Torque: 142ft·lbf (193N·m) @ 6000rpm
    • Redline: 7800pm

[edit] K20A3

• Found in:
  • Honda Civic Si
    • Displacement: 1998 cc
    • Compression: 9.8:1
    • Power: 160 hp (119 kW)* (119 kW) @ 6500 rpm
    • Torque: 132 lb·ft (179 N·m) @ 5000 rpm
  • Acura RSX
    • Displacement: 1998 cc
    • Compression: 11.8:1
    • Power: 155 hp (116 kW)* (115 kW) @ 6500 rpm
    • Torque: 141 lb·ft (191 N·m)* (191 N·m) @ 4000 rpm
    • Redline: 6800 rpm
    • (Horsepower and torque calculations reflect new SAE J1349 procedures revised August 2004)
• (The intake manifold is often credited with being responsible for the difference in HP between these two variants. The Civic Si being equipped with an aluminium intake manifold, and the RSX Base model equipped with a plastic version.

[edit] K20Z1

• Found in:
  • 2005-2006 Acura RSX-S
    • Displacement: 1998 cc
    • Compression: 11.0:1
    • Power: 210 hp (154 kW) @ 7800 rpm (SAE net J1349 Rev 8/04)
    • Torque: 143 ft·lbf (194 N·m) @ 7000 rpm (SAE net J1349 Rev 8/04)
    • Redline: 8100 rpm

[edit] K20Z2

• Found in:
  • 2006- Acura CSX (Canada)
    • Displacement: 1998 cc
    • Compression: 9.6:1
    • Power: 155 hp (114 kW) @ 6000 rpm (SAE net J1349 Rev 8/04)
    • Torque: 139 ft·lbf (188 N·m) @ 4500 rpm / 188 N·m @ 4200 rpm (Singapore)
    • Redline: 6800 rpm
  • 2006- Honda Civic (JDM)
    • Displacement: 1998 cc
    • Compression: 9.6:1
    • Power: 155 hp (114 kW) @ 6000 rpm
    • Torque: 139 ft·lbf (188 N·m) @ 4500 rpm
    • Redline: 6800 rpm
  • 2006- Honda Accord Sport(Europe)
    • Displacement: 1998 cc
    • Compression: 9.6:1
    • Power: 155 hp (114 kW) @ 6000 rpm
    • Torque: 139 ft·lbf (188 N·m) @ 4500 rpm
    • Redline: 6800 rpm

[edit] K20Z3

This inline-4 cylinder internal combustion engine is found in the US market Honda Civic Si (2006+) & Canadian market Acura CSX Type-S. It has an aluminium block with an aluminium head, and a bore and stroke of 86 mm*86 mm, resulting in a 2.0 Liter displacement.

• Found in:
  • 2006+ Honda Civic Si (FG2 - Coupe & FA5 - Sedan), 2007 Acura CSX Type-S
    • Displacement : 1998 cc
    • Compression : 11.0:1
    • Power: 197 bhp (147 kW) @ 7800 rpm (sae NET Rev 8/04)
    • Torque: 139 ft·lbf (189 N·m) @ 6200 rpm (sae NET Rev 8/04)
    • Redline: 8200 rpm

[edit] K20Z4

This inline-4 cylinder internal combustion engine is found in the redesigned Honda Civic Type-R (FN2). It has an aluminium block with an aluminium head, and a bore and stroke of 86 mm*86 mm, resulting in a 2.0 Liter displacement.

• Found in:
  • 2007 Honda Civic Type-R (FN2) (Europe Market)
    • Displacement : 1998 cc
    • Compression : 11.0:1
    • Power: 197 bhp (201 PS, 148 kW) @ 7800 rpm
    • Torque: 142 ft·lbf (193 N·m) @ 5600 rpm
    • Redline: 8200 rpm
    • 16V DOHC I-VTEC changes from low speed cams to high speed cams at 5,600 RPM

[edit] K23

[edit] K23A1

• Turbocharged
• Found in:
  • 2007/2008 Acura RDX
    • Displacement: 2300 cc (acura.com)
    • Compression: 8.8:1 (acura.com)
    • Power: 240 hp (179 kW) @ 6000 rpm (SAE net)
    • Torque: 260 lb·ft (353 N·m) @ 4500 rpm (SAE net)
    • Redline: 6800 rpm (acura.com)
    • Bore: 86 mm
    • Stroke: 99 mm

[edit] K24

K24A4

[edit] K24A1

• Found in:
  • 2002-2006 Honda CR-V
    • Displacement: 2354 cc
    • Bore and Stroke: 87 mm x 99 mm (3.43x3.90 inches)
    • Compression: 9.6:1
    • Power: 160 hp (120 kW) @ 6000 rpm
    • Torque: 162ft·lbf (220 N·m) @ 3600 rpm
    • Redline: 6500 rpm

[edit] K24A2

• Found in:
  • 2004-2008 Acura TSX
    • Displacement: 2354 cc
    • Bore and Stroke: 87 mm x 99 mm (3.43x3.90 inches)
    • Compression: 10.5:1
    • Power: 200 hp (147 kW) @ 6800 rpm (2004-2005)
    • Power: 205 hp (150 kW) @ 6800 rpm (2006-2007) *SAE Net Rev 8/04
    • Torque: 166 ft·lbf (225 N·m) @ 4500 rpm (2004-2005)
    • Torque: 164 ft·lbf (222 N·m) @ 4500 rpm (2006-2007)*SAE Net Rev 8/04
    • VTEC Engagement: 6000 RPM
    • Redline: 7100 rpm

[edit] K24A3

• Found in:
  • 2003-2007 Honda Accord (Europe(EDM)) and Japan(JDM)) and 2003-2007 Honda Accord Euro CL9 (Australia)
    • Displacement: 2354 cc
    • Bore and Stroke: 87 mm x 99 mm (3.43x3.90 inches)
    • Compression: 10.5:1
    • Power: 189 hp (140 kW) @ 6800 rpm
    • Torque: 164.5 ft·lbf (223 N·m) @ 4500 rpm
    • Redline: 7400 rpm
    • VTEC Engagement: 6000rpm

[edit] K24A4

• Found in:
  • 2003-2005 Honda Accord, 2003-2006 Honda Element
    • Displacement: 2354 cc
    • Bore and Stroke: 87 mm x 99 mm (3.43x3.90 inches)
    • Compression: 9.7:1
    • Power: 160 hp (119 kW) @ 5500 rpm (166 hp in 2007/2008)
    • Torque: 161 ft·lbf (218 N·m) @ 4500 rpm (@4000 rpm in 2007/2008)
    • Redline: 6500 rpm

[edit] K24A8

• Found in:
  • 2006-2007 Honda Accord
    • Displacement: 2354 cc
    • Bore and Stroke: 87 mm x 99 mm
    • Compression: 9.7:1
    • Power: 166 hp (124 kW) @ 6000 rpm
    • Torque: 160 lb·ft (217 N·m) @ 4000 rpm
    • Redline: 6500 rpm
  • 2007-2008 Honda Element
    • Displacement: 2354 cc
    • Bore and Stroke: 87 mm x 99 mm
    • Compression: 9.7:1
    • Power: 166 hp @ 5800 rpm
    • Torque: 161 lb·ft (218 N·m) @ 4000 rpm
    • Redline: 6500 rpm

[edit] K24Z1

• Found in:
  • 2007-2008 Honda CR-V
    • Displacement: 2354 cc
    • Bore and Stroke: 87 mm x 99 mm (3.43x3.90 inches)
    • Compression: 9.7:1
    • Power: 166 hp @ 5800 rpm
    • Torque: 161 ft·lbf @ 4200 rpm
    • Redline: 6500 rpm

[edit] K24Z2

• Found in:
  • 2008 Honda Accord LX/LX-P trim models
    • Displacement: 2354 cc
    • Bore and Stroke: 87 mm x 99 mm (3.43x3.90 inches)
    • Compression: 10.5:1
    • Power: 177 @ 6500 rpm
    • Torque: 161 ft·lbf @ 4300 rpm
    • Redline: 6800 rpm

[edit] K24Z3

• Found in:
  • 2008 Honda Accord LX-S/EX/EX-L trim models
    • Displacement: 2354 cc
    • Bore and Stroke: 87 mm x 99 mm (3.43x3.90 inches)
    • Compression: 10.5:1
    • Power: 190 @ 7000 rpm
    • Torque: 162 ft·lbf @ 4400 rpm
    • Redline: 7100 rpm

• Found in:
  • 2009 Acura TSX
    • Displacement: 2354 cc
    • Bore and Stroke: 87 mm x 99 mm (3.43x3.90 inches)
    • Compression: 11.0:1
    • Power: 201 @ 7000 rpm
    • Torque: 172 ft·lbf (MT), 170 ft·lbf (AT) @ 4300 rpm
    • Redline: 7100 rpm