Honda K engine


The Honda K-series engine is a line of four-cylinder four-stroke car engines introduced in 2001. The K-series engines are equipped with DOHC valvetrains and use roller rockers on the cylinder head to reduce friction. The engines use a coil-on-plug, distributorless ignition system with a coil for each spark plug. This system forgoes the use of a conventional distributor-based ignition timing system in favor of a computer-controlled system that allows the ECU to control ignition timings based on various sensor inputs. The cylinders have cast iron sleeves similar to the B- and F-series engines, as opposed to the FRM cylinders found in the H- and newer F-series engines found only in the Honda S2000.
Similar to B series, the K-series car engines have two short blocks with the same design; the only difference between them being the deck height. K20 uses the short block with a deck height of where K23 and K24 block has a deck height of.
Two versions of the Honda i-VTEC system can be found on a K-series engine, and both versions can come with variable timing control on the intake cam. 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 engine speeds, 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. A modified K20C engine is used in motorsport, as the Sports Car Club of America Formula 3 and 4 series that run in North America both use a K20C engine, with the Formula 4 engine not having a turbocharger.
Another significant difference between K-series engines is the alignment of the crankshaft to the center line of the bore. The K20C1 engine block has an offset alignment. Engines that do not have their crank shaft aligned to the bore are known as Desaxe engines. On the K20C1 engine this allows the power stroke to have more leverage and less thrust waste on sidewalls.
K-series engine swaps, also known as "K-swaps", have increasingly gained popularity in the import scene, but also among hot rodders and kit car enthusiasts, because they can be put in longitudinal rear-wheel drive layouts.

K20

K20A (i-VTEC)

;Applications:
EngineApplicationCompressionPowerTorqueRedlineRev limiteri-VTEC
engagement		Intake
Manifold
K20A
2001-2006 Honda Civic Type R 11.5:1 at 8000 rpm at 7000 rpm8400 rpm6000 rpmPRC
K20A
2001-2006 Honda Integra Type R 11.5:1 at 8000 rpm at 7000 rpm8400 rpm8600 rpm6000 rpmPRC
K20A
2002-2008 Honda Accord Euro R 11.5:1 at 8000 rpm at 6000 rpm8400 rpm8600 rpm6000 rpmRBC
K20A
2007-2011 Honda Civic Type R 11.7:1 at 8000 rpm at 6100 rpm8400 rpm8600 rpm5800 rpmRRC
K20A 2000-2006 Honda Stream 9.7:1 at 6500 rpm at 4000 rpm6800 rpmPNC
K20A 2000-2006 Honda Stream 9.8:1 at 6500 rpm at 4000 rpm6800 rpm7000PNC
K20A 2001-2004 Honda CR-V 9.8:1 at 6500 rpm at 4000 rpm6800 rpmPNA
K20A 2001-2006 Honda Integra Type S 9.8:1 at 6500 rpm at 4000 rpm6800 rpmPNC
K20A 2001-2005 Honda Stepwgn 9.8:1 at 6500 rpm at 4000 rpm6800 rpmPNC
K20A 2001-2005 Honda Stepwgn Spada 9.7:1 at 6500 rpm at 4000 rpm6800 rpmPNC
K20A 2005-2009 Honda Stepwgn 9.6:1 at 6000 rpm at 4500 rpm6800 rpmRTA
K20A 2002-2008 Honda Accord 9.8:1 at 6000 rpm at 4500 rpm6800 rpmRAA
K20A 2002-2008 Honda Accord 9.8:1 at 6000 rpm at 4500 rpm6800 rpmRAA
K20A 2004-2009 Honda Edix 9.7:1 at 6500 rpm at 4000 rpm6800 rpmPNC
K20A 2005-2010 Honda Civic 9.6:1 at 6000 rpm at 4500 rpm6800 rpmRTB
K20A12001-2006 Honda Stream 9.7:1 at 6500 rpm at 4000 rpm6800 rpmPNA
K20A12001-2006 Honda Stream 9.8:1 at 6500 rpm at 4000 rpm6800 rpmPNC
K20A22001-2006 Honda Civic Type R 11.0:1 at 7400 rpm at 5900 rpm7900 rpm8250 rpm5800 rpmPRB
K20A22002-2004 Acura RSX Type S11.0:1 at 7400 rpm at 6000 rpm7900 rpm8250 rpm5800 rpmPRB
K20A22002-2004 Honda Integra Type R 11.0:1 at 7400 rpm at 6000 rpm7800 rpm8100 rpm5800 rpm
K20A32002-2006 Acura RSX9.8:1 at 6500 rpm at 4000 rpm6800 rpm7000 rpm2300 rpmPNC
K20A32002-2005 Honda Civic9.8:1 at 6500 rpm at 4000 rpm6800 rpm7000 rpm2300 rpmPRB
K20A32002-2005 Honda Civic Si USDM9.8:1 at 6500 rpm at 4000 rpm6800 rpm7000
rpm		2300 rpmPRB
K20A32002-2005 Honda Civic Type S EDM9.8:1 at 6500 rpm at 4000 rpm6800 rpm7100 rpm2200 rpmPRB
K20A32003-2006 Honda Civic 2.0 i-VTEC 9.8:1 at 6500 rpm at 5000 rpm6800 rpm7000 rpmPRB
K20A42002-2006 Honda CR-V9.8:1 at 6500 rpm at 4000 rpm6800 rpmPNA
K20A62003-2006 Honda Accord 9.8:1 at 6500 rpm at 4000 rpm6800 rpm2500 rpmRAA
K20A62003-2006 Honda Accord 9.8:1 at 6500 rpm at 4000 rpm6800 rpm2500 rpmRAA
K20A72003-2007 Honda Accord 9.8:1 at 6000 rpm at 4500 rpm6800 rpmRAA
K20A92004–2007 Honda FR-V 9.8:1 at 6500 rpm at 4000 rpm6800 rpm2500 rpmPNC

;Additional notes:
K20A Spec R engine
  • Chromoly flywheel, higher-tensile strength connecting rods, high-compression pistons, stiffer valve springs, higher-lift hollow camshafts with more duration, and 2007–2011 cylinder-head intake-port and exhaust-port surface polishing used in NSX-R. The JDM K20A type-R engine block would be removed from production assembly line by an experienced Honda engine technician to torque the connecting rod bolts to factory specification by hand using micrometer to measure connecting rod bolt stretching. Then the JDM K20A type-R engine block would be returned to the production assembly line to complete the engine building process.

K20B (i-VTEC I)

  • Injection Pressure:
  • Center Fuel Injection with swirl guide
  • Air-Fuel Ratio:
  • *Normal driving cycle: 65:1
  • *Acceleration/High load driving cycle: 14.7:1
  • Deep Piston Cavity formed in top of Pistons
  • Intake Manifold code: PPD
  • Application: 2003-2006 Honda Stream Absolute

K20Z (i-VTEC)

;Applications:
EngineApplicationCompressionPowerTorqueRedlineRev limiteri-VTEC
engagement		Intake
Manifold
K20Z12005-2006 Acura RSX Type S11.0:1 at 7800 rpm at 6200 rpm8100 rpm8300 rpm5800 rpmPRB
K20Z12005-2006 Honda Integra Type S 11.0:1 at 7800 rpm at 6200 rpm8100 rpm8300 rpm5800 rpm
K20Z22006-2011 Acura CSX9.8:1 at 6000 rpm at 4500 rpm6800 rpm
K20Z22006-2008 Honda Accord 9.8:1 at 6000 rpm at 4500 rpm6800 rpmRBA
K20Z22006-2010 Honda Civic 9.8:1 at 6000 rpm at 4500 rpm6800 rpmRTB
K20Z32006-2011 Honda Civic Si11.0:1 at 7800 rpm at 6200 rpm8000 rpm8300 rpm5800 rpmRBC
K20Z32007-2010 Acura CSX Type S11.0:1 at 7800 rpm at 6200 rpm8000 rpm8300 rpm5800 rpm
K20Z42007-2010 Honda Civic Type R 11.0:1 at 7800 rpm at 5600 rpm8000 rpm8200 rpm5400 rpmRSP
K20Z52007-2010 Honda Civic Si 11.0:1 at 7800 rpm at 6800 rpm8000 rpm8200 rpm5400 rpm

;Additional notes:
K20Z3
  • The K20Z3 has Honda's traditional performance VTEC on the intake and the exhaust cams, as found on previous generation of engines. Variable cam timing technology is included on the intake but not the exhaust cams. The added timing control corresponds to the "i" in i-VTEC.

K20C (Earth Dreams VTEC Turbo)

;Applications:
EngineApplicationCompressionPowerTorqueRedlineRev limiteri-VTEC
engagement
K20C12015-2017 Honda Civic Type R (EDM)
2017-2021 Honda Civic Type R (USDM)
2018-present Ariel Atom 4
2023-present Honda Civic Type R (USDM)		9.8:1 at 6500 rpm at 2500–4000 rpm7000 rpm7000 rpm
K20C32016-present Honda Avancier/UR-V 9.8:1 at 6500 rpm at 4200 rpm6100 rpm
K20C42018-2022 Honda Accord
9.8:1 at 6500 rpm at 1500–4000 rpm6800 rpm
K20C42019-present Acura RDX
9.8:1 at 6500 rpm at 1600–4500 rpm6800 rpm
K20C52019-present Acura RDX 9.8:1265 hp at 6500 rpm at 3000–4000 rpm6800 rpm
K20C62021-2025 Acura TLX9.8:1272 hp at 6500 rpm280 lb-ft at 1600–4500 rpm6800 rpm
K20C82024-present Acura Integra Type S9.8:1 at 6500 rpm at 2600–4000 rpm7000 rpm-

;Additional notes
  • Earth Dreams Technology
  • K20C1: First Honda Type R engine to be built in the US at the Honda Anna Engine Plant in Anna, Ohio. First time Honda has used a turbocharger on the TYPE R.
  • K20C5: All Acura RDX sold in China
  • Although the K20C4 in the Acura RDX and the K20C6 in the Acura TLX share the same internals, they are named differently due to different engine mount points to accommodate the sedan body of the TLX.
  • The VTEC mechanism is available only on the exhaust valves.
  • K20C1 engines have an offset of 8mm on the crankshaft from the centerline of the bore.
  • K20C8 : Engine is identical to the K20C1, it is named differently to accommodate different mounting points.

K20C & K20Z (Earth Dreams i-VTEC)

;Applications:
EngineApplicationCompressionPowerTorqueRedlineRev limiteri-VTEC
engagement
K20C22016-2018 Honda Civic (LX & EX) Sedan (USDM)
2019–2024 Honda Civic Sedan
2016–2020 Honda Civic Coupe
2022–2024 Honda Civic Hatchback 		10.8:1 at 6500 rpm at 4200 rpm6700 rpm7000 rpm6100 rpm
6500 rpm
K20C22016-2023 Formula 4 United States Championship10.8:1 at 6500 rpm at 4200 rpm6800 rpm7000 rpm6100 rpm
K20C92025-present Honda Civic 13.0:1 at 6400 rpm at 4000–5000 rpm6700 rpm
K20Z52023-present Honda HR-V 10.8:1 at 6500 rpm at 4200 rpm6800 rpm

;Additional notes

K23

K23A (i-VTEC Turbo)

;Applications:
EngineApplicationCompressionPowerTorqueRedlineRev limiteri-VTEC
engagement		Intake
Manifold
K23A12007-2012 Acura RDX8.8:1 at 6000 rpm at 4500 rpm6800 rpm6900 rpm2500 rpm
K23A1--------

;Additional notes:
  • This version of the K engine uses a Mitsubishi TD04HL-15T turbocharger with a dual path turbine housing, optimizing low end response while allowing better high end flow. Maximum boost pressure is 13.5psi. The engine includes i-VTEC and VTC technologies and comes mated to a version of Honda's 5-speed automatic with SH-AWD.

K24

K24A (i-VTEC)

EngineApplicationCompressionPowerTorqueRedlineRev limiteri-VTEC
engagement		Intake
Manifold
K24A
2002-2008 Honda Accord 24T, 24TL, 24S and Type-S 10.5:1 at 6800 rpm at 4500 rpm7100 rpm7200 rpm6000 rpmRBB
K24A
2002-2008 Honda Accord 24T 10.5:1 at 6800 rpm at 4500 rpm7100 rpm7200 rpm6000 rpmRBB
K24A
2008-2013 Honda Accord 24E, 24IL, 24TL and Type-S 11:1 at 7000 rpm at 4300 rpm5000 rpmR40
K24A
2003-2008 Honda Odyssey Absolute 10.5:1 at 6800 rpm at 4500 rpm7100 rpm7200 rpm6000 rpmRBB
K24A
2003-2008 Honda Odyssey Absolute 10.5:1 at 6800 rpm at 4500 rpm7100 rpm7200 rpm6000 rpmRBB
K24A
2008-2013 Honda Odyssey Absolute 11:1 at 7000 rpm at 4300 rpm5000 rpmR40
K24A
2008-2013 Honda Odyssey Absolute 11:1 at 7000 rpm at 4300 rpmR40
K24A2003-2005 Honda Element 9.7:1 at 5500 rpm at 4500 rpmPZD
K24A2003-2008 Honda Odyssey 9.7:1 at 5500 rpm at 4500 rpmRAA
K24A2008-2013 Honda Odyssey 10:1 at 6000 rpm at 4300 rpmRAA
K24A2003-2005 Honda Stepwgn Spada 24T 9.6:1 at 6000 rpm at 3600 rpm
K24A2004-2013 Honda Elysion 9.7:1 at 5500 rpm at 4500 rpm
K24A2006-2009 Honda Edix 24S 9.7:1 at 5700 rpm at 4000 rpm
K24A2005-2006 Honda CR-V 9.6:1 at 6000 rpm at 3600 rpm6500 rpm7000 rpmPPA
K24A2006-2011 Honda CR-V 9.7:1 at 5800 rpm at 4200 rpm
K24A2011-2016 Honda CR-V 10:1 at 7000 rpm at 4400 rpm
K24A12002-2006 Honda CR-V9.6:1 at 6000 rpm at 3600 rpm6500 rpm7000 rpm2750 rpmPPA
K24A22004-2005 Acura TSX10.5:1 at 6800 rpm at 4500 rpm7100 rpm7200 rpm6000 rpmRBB
K24A22006-2008 Acura TSX10.5:1 at 7000 rpm at 4500 rpm7100 rpm7200 rpm6000 rpmRBB
K24A32003-2007 Honda Accord 10.5:1 at 6800 rpm at 4500 rpm7200 rpm7300 rpm6000 rpmRBB
K24A32003-2007 Honda Accord Euro 10.5:1 at 6800 rpm at 4500 rpm7200 rpm7300 rpm6000 rpmRBB
K24A42003-2005 Honda Accord 9.7:1 at 5500 rpm at 4500 rpm6800 rpm3500rpmRAA
K24A42003-2008 Honda Odyssey9.7:1 at 5500 rpm at 4500 rpm6800 rpmRAA
K24A42003-2006 Honda Element9.7:1 at 5500 rpm at 4500 rpm6800 rpmPZD
K24A82006-2007 Honda Accord 9.7:1 at 5800 rpm at 4000 rpm6500 rpm2400/4500 rpmRAA
K24A82007-2011 Honda Element9.7:1 at 5800 rpm at 4000 rpm6800 rpm2400/4500 rpmPZD
K24A82008-2014 Honda Odyssey 10.5:1

;Additional notes:
K24A2

K24Z & K24Y (i-VTEC)

;Applications:
EngineApplicationCompressionPowerTorqueRedlineRev limiteri-VTEC
engagement		Intake
Manifold
K24Z12007-2009 Honda CR-V 9.7:1 at 5800 rpm at 4200 rpm6500 rpm
K24Z22008-2012 Honda Accord LX/LX-P 10.5:1 at 6500 rpm at 4300 rpm6800 rpm7100 rpm5100 rpm
K24Z22016-2020 Proton Perdana10.5:1 at 6500 rpm at 4300 rpm6800 rpm7100 rpm
K24Z32008-2012 Honda Accord LX-S/EX/EX-L 10.5:1 at 7000 rpm at 4400 rpm7100 rpm5100 rpm
K24Z32009-2014 Acura TSX and Honda Accord (Europe) 11.0:1 at 7000 rpm at 4300 rpm7100 rpm7300 rpm5000 rpmR40
K24Z42008-2012 Honda CR-V 9.7:1 at 5800 rpm at 4200 rpm6500 rpm
K24Z52010-2015 Honda Spirior10.5:1 at 6500 rpm at 4300 rpm6500 rpm
K24Z62010-2011 Honda CR-V 10.5:1 at 6800 rpm at 4400 rpm7100 rpm7200 rpm
K24Z72012-2013 Honda Civic Si11.0:1 at 7000 rpm at 4400 rpm7000 rpm7200 rpm5200 rpm
K24Z72014-2015 Honda Civic Si11.0:1 at 7000 rpm at 4400 rpm7000 rpm7500 rpm5000 rpm
K24Z72013-2015 Acura ILX11.0:1 at 7000 rpm at 4400 rpm7100 rpm7200 rpm
K24Z72012-2014 Honda CR-V 10.0:1 at 7000 rpm at 4400 rpm7000 rpm7200 rpm5000 rpm
K24Y12012-2014 Honda CR-V 10.5:1 at 6000 rpm at 4300 rpm6500 rpm-
K24Y22012-2015 Honda Crosstour10.0:1 at 7000 rpm at 4400 rpm7100 rpm-

K24W & K24V (Earth Dreams i-VTEC)

Direct Injection, i-VTEC
;Applications:
EngineApplicationCompressionFuel InjectionPowerTorqueRedlinei-VTEC
engagement		Intake
Manifold
K24W2013-present Honda Odyssey 11.1:1Multi Point at 6400 rpm at 4000 rpm6800 rpm4800 rpm
K24W12013-2017 Honda Accord 11.1:1Direct at 6400 rpm at 3900 rpm6800 rpm4800 rpm
K24W12013-2017 Honda Accord Sport 11.1:1Direct at 6400 rpm at 3900 rpm6800 rpm4800 rpm
K24W42013-2018 Honda Accord 10.1:1Multi Point at 6200 rpm at 4000 rpm6500 rpm
K24W42013-present Honda Odyssey 10.1:1Multi Point at 6200 rpm at 4000 rpm6500 rpm
K24W72015-2020 Acura TLX11.6:1Direct at 6800 rpm at 3900 rpm7000 rpm5000 rpm ±100 rpm
K24W72015-2018 Honda Spirior Si11.6:1Direct at 6800 rpm at 3900 rpm7000 rpm5000 rpm ±100 rpm
K24W92015-2019 Honda CR-V 11.1:1Direct at 6400 rpm at 3900 rpm6800 rpm4800 rpm
K24V52015-2016 Honda CR-V 10.1:1Multi Point at 6200 rpm at 4000 rpm6500 rpm
K24V52017-2022 Honda CR-V 10.1:1Multi Point at 6200 rpm at 4000 rpm6500 rpm
K24V72016-2022 Acura ILX11.6:1Direct at 6800 rpm at 3800 rpm7000 rpm5000 rpm ±100 rpm