Honda K engine
The Honda K-series engine is a line of four-cylinder four-stroke car engine introduced in 2001. 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 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 212mm where K23 and K24 block has a deck height of 231.5mm.
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 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. 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.
K20
K20A
;Applications:| Engine | Application | Compression | Power | Torque | Redline | Rev limiter | i-VTEC engagement | Intake Manifold |
| K20A | 2001-2006 Honda Civic Type R | 11.5:1 | @ 8000 RPM | @ 7000 RPM | 8400 RPM | 6000 RPM | PRC | |
| K20A | 2001-2006 Honda Integra Type R | 11.5:1 | @ 8000 RPM | @ 7000 RPM | 8400 RPM | 8600 RPM | 6000 RPM | PRC |
| K20A | 2002-2008 Honda Accord Euro R | 11.5:1 | @ 8000 RPM | @ 6000 RPM | 8400 RPM | 6000 RPM | RBC | |
| K20A | 2007-2011 Honda Civic Type R | 11.7:1 | @ 8000 RPM | @ 6100 RPM | 8600 RPM | 5800 RPM | RRC | |
| K20A1 | 2001-2006 Honda Stream | 9.7:1 | @ 6500 RPM | @ 4000 RPM | 6800 RPM | |||
| K20A1 | 2001-2006 Honda Stream | 9.8:1 | @ 6500 RPM | @ 4000 RPM | 6800 RPM | |||
| K20A2 | 2001-2006 Honda Civic Type R | 11.0:1 | @ 7400 RPM | @ 5900 RPM | 7900 RPM | 8250 RPM | 5800 RPM | |
| K20A2 | 2002-2004 Acura RSX Type S | 11.0:1 | @ 7400 RPM | @ 6000 RPM | 7900 RPM | 8250 RPM | 5800 RPM | PRB |
| K20A2 | 2002-2004 Honda Integra Type R | 11.0:1 | @ 7400 RPM | @ 6000 RPM | 7800 RPM | 8100 RPM | 5800 RPM | |
| K20A3 | 2002-2006 Acura RSX | 9.8:1 | @ 6500 RPM | @ 4000 RPM | 6800 RPM | 2300 RPM | ||
| K20A3 | 2002-2005 Honda Civic Si | 9.8:1 | @ 6500 RPM | @ 4000 RPM | 6800 RPM | 2300 RPM | PRB | |
| K20A3 | 2002-2005 Honda Civic SiR | 9.8:1 | @ 6500 RPM | @ 4000 RPM | 6800 RPM | 2300 RPM | ||
| K20A3 | 2002-2005 Honda Civic Type S | 9.8:1 | @ 6500 RPM | @ 4000 RPM | 6800 RPM | 2300 RPM | ||
| K20A3 | 2003-2006 Honda Civic 2.0 i-VTEC | 9.8:1 | @ 6500 RPM | @ 5000 RPM | 6800 RPM | |||
| K20A4 | 2002-2006 Honda CR-V | 9.8:1 | @ 6500 RPM | @ 4000 RPM | 6800 RPM | |||
| K20A4 | 2003-2007 Honda Accord | @ 6500 RPM | @ 4000 RPM | |||||
| K20A6 | 2003-2006 Honda Accord | 9.8:1 | @ 6500 RPM | @ 4000 RPM | 6800 RPM | 2500 RPM | ||
| K20A6 | 2003-2006 Honda Accord | 9.8:1 | @ 6500 RPM | @ 4000 RPM | 6800 RPM | 2500 RPM | ||
| K20A9 | 2004-2007 Honda FR-V | 9.8:1 | 150hp @ 6500 RPM | 142 lb*ft @ 4000 RPM | 6800 RPM |
;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.
K20A (Eco Engine)
- Found in :
- * 2002-2005 Honda Integra-
- * 2000-2005 Honda Stream S
- * 2000-2005 Honda Stream S
- * 2005-2010 Honda Edix
- * 2005-2008 Honda Accord Sedan
- * 2005-2008 Honda Accord Wagon
- * 2006-2010 Honda Civic Sedan
- DOHC i-VTEC
- Power and Torque may vary by the Compression Ratio, Intake manifold, and Exhaust manifold
- Power: 155 hp@6500rpm; 158 hp@6500rpm
- Torque: 138 lb-ft@4000rpm; 140 lb-ft@4000rpm
- Redline 6800rpm
- Compression: 9.7:1; 9.8:1
- Bore X Stroke: 86mm x 86mm
- Displacement: 1998cc
- K20A9 used in 2004-2008 Europe Honda FR-V
K20B
- 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
- Application: 2004-2006 Honda Stream Absolute
K20C
| Engine | Application | Compression | Power | Torque | Redline | Rev limiter | i-VTEC engagement |
| K20C1 | 2015-present Honda Civic Type R 2017-present Honda Civic Type R | 9.8:1 | @ 6500 RPM | @ 2500 RPM | 7000 RPM | 7000 RPM | |
| K20C2 | 2016-present Honda Civic LX | 10.8:1 | @ 6500 RPM | @ 4200 RPM | 6700 RPM | 7000 RPM | 6100 RPM 6500 RPM |
| K20C2 | 2016-present United States Formula 4 Championship | 10.8:1 | @ 6500 RPM | @ 4200 RPM | 6800 RPM | 7000 RPM | 6100 RPM |
| K20C3 | 2016-present Honda Avancier/UR-V | 10.8:1 | @ 6500 RPM | @ 4200 RPM | 6100 RPM | ||
| K20C4 | 2018-present Honda Accord | 9.8:1 | @ 6500 RPM | @ 1500-4000 RPM | 6800 RPM | ||
| K20C4 | 2018-present Acura RDX 2021 Acura TLX | 9.8:1 | @ 6500 RPM | @ 1600-4500 RPM | 6800 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.
- The 3rd generation Acura RDX uses the K20C4 motor found in the 10th generation Honda Accord, but with different tuning and other small modifications compared to that of the Accord. This modified version produces 272 hp and 280 lb-ft of torque.
K20Z
| Engine | Application | Compression | Power | Torque | Redline | Rev limiter | i-VTEC engagement | Intake Manifold |
| K20Z1 | 2005-2006 Acura RSX Type S | 11.0:1 | @ 7800 RPM | @ 6200 RPM | 8100 RPM | 8300 RPM | 5800 RPM | PRB |
| K20Z1 | 2005-2006 Honda Integra Type S | 11.0:1 | @ 7800 RPM | @ 6200 RPM | 8100 RPM | 8300 RPM | 5800 RPM | |
| K20Z2 | 2006-2011 Acura CSX | 9.8:1 | @ 6000 RPM | @ 4500 RPM | 6800 RPM | |||
| K20Z2 | 2006-2011 Honda Civic | 9.8:1 | @ 6000 RPM | @ 4500 RPM | 6800 RPM | |||
| K20Z2 | 2006-2015 Honda Accord | 9.8:1 | @ 6000 RPM | @ 4500 RPM | 6800 RPM | |||
| K20Z2 | 2006-2010 Honda Civic 2.0 S / S-L | 9.8:1 | @ 6000 RPM | @ 4500 RPM | 6800 RPM | |||
| K20Z3 | 2006-2011 Honda Civic Si | 11.0:1 | @ 7800 RPM | @ 6200 RPM | 8000 RPM | 8300 RPM | 5800 RPM | RBC |
| K20Z3 | 2007-2010 Acura CSX Type S | 11.0:1 | @ 7800 RPM | @ 6200 RPM | 8000 RPM | 8300 RPM | 5800 RPM | |
| K20Z4 | 2007-2010 Honda Civic Type R | 11.0:1 | @ 7800 RPM | @ 6800 RPM | 8000 RPM | 8200 RPM | 5400 RPM | RSP |
| K20Z5 | 2007-2010 Honda Civic Si | 11.0:1 | @ 7800 RPM | @ 6800 RPM | 8000 RPM | 8200 RPM | 5400 RPM |
;Additional notes:
K20Z3
- It has an aluminum block with an aluminum head. The K20Z3 has Honda's traditional performance VTEC on the intake and the exhaust cams. Variable cam timing technology is included on the intake but not the exhaust cams. The added timing control corresponds to the added "i" in i-VTEC.
K23
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.
| Application | Redline | Rev limiter | i-VTEC engagement | Intake Manifold |
| 2007-2012 Acura RDX | 6800 RPM | 6900 RPM | 2500 RPM |
K24
K24A
;Applications:| Engine | Application | Compression | Power | Torque | Redline | Rev limiter | i-VTEC engagement | Intake Manifold |
| K24A1 | 2002-2006 Honda CR-V | 9.6:1 | @ 6000 RPM | @ 3600 RPM | 6500 RPM | 7000 RPM | RAA | |
| K24A2 | 2002-2008 Honda Accord Type-S | 10.5:1 | @ 6800 RPM | @ 4500 RPM | 7100 RPM | 7200 RPM | 6000 RPM | |
| K24A2 | 2003-2008 Honda Odyssey Absolute | 10.5:1 | @ 6800 RPM | @ 4500 RPM | 7100 RPM | 7200 RPM | 6000 RPM | |
| K24A2 | 2004-2005 Acura TSX | 10.5:1 | @ 6800 RPM | @ 4500 RPM | 7100 RPM | 7200 RPM | 6000 RPM | RBB |
| K24A2 | 2006-2008 Acura TSX | 10.5:1 | @ 7000 RPM | @ 4500 RPM | 7100 RPM | 7200 RPM | 6000 RPM | RBB |
| K24A3 | 2003-2007 Honda Accord | 10.5:1 | @ 6800 RPM | @ 4500 RPM | 7200 RPM | 7300 RPM | 6000 RPM | RBB |
| K24A3 | 2003-2007 Honda Accord Euro | 10.5:1 | @ 6800 RPM | @ 4500 RPM | 7200 RPM | 7300 RPM | 6000 RPM | RBB |
| K24A4 | 2003-2005 Honda Accord | 9.7:1 | @ 5500 RPM | @ 4500 RPM | 6800 RPM | 2400 RPM | RAA | |
| K24A4 | 2003-2008 Honda Odyssey | 9.7:1 | @ 5500 RPM | @ 4500 RPM | 6800 RPM | RAA | ||
| K24A4 | 2003-2006 Honda Element | 9.7:1 | @ 5500 RPM | @ 4500 RPM | 6800 RPM | RAA | ||
| K24A8 | 2006-2007 Honda Accord | 9.7:1 | @ 5800 RPM | @ 4000 RPM | 6500 RPM | 2400 RPM | RAA | |
| K24A8 | 2007-2011 Honda Element | 9.7:1 | @ 5800 RPM | @ 4000 RPM | 6800 RPM | 2400 RPM | RAA | |
| K24A8 | 2008-2014 Honda Odyssey | 10.5:1 |
;Additional notes:
K24A2 and K24A3
K24W (Earth Dreams)
Direct Injection, iVTECThis section previously inaccurately suggested that the 2016-2017+ Acura ILX engine K24V7 and the K24W7 of the Acura TLX are the same engine, and although they may be very closely related, even sharing identical internal architecture and components, they actually are different engines with different Honda internal engine code designations. This may be strictly due to different transmissions, as the 2016-2017+ ILX uses its own specific 8-speed dual-clutch auto with a torque converter, as well as different exhaust, intake, and accessory packaging due to their differing chassis .
;Applications:
| Engine | Application | Compression | Power | Torque | Redline | i-VTEC engagement | Intake Manifold |
| K24W | 2013-2017 Honda Accord | 11.1:1 | @ 6400 RPM | @ 3900 RPM | 6800 RPM | 4800 RPM | |
| K24W | 2015-2019 Honda CR-V | 11.1:1 | @ 6400 RPM | @ 3900 RPM | 6800 RPM | 4800 RPM | |
| K24W4 | 2013-present Honda Accord | 10.1:1 | @ 6200 RPM | @ 4000 RPM | 6600 RPM | ||
| K24W4 | 2014-present Honda Odyssey | 10.1:1 | @ 6200 RPM | @ 4000 RPM | 6600 RPM | ||
| K24V5 | 2017-present Honda CR-V | 10.1:1 | @ 6200 RPM | @ 4000 RPM | |||
| K24V7 | 2016-present Acura ILX | 11.6:1 | @ 6800 RPM | @ 3800 RPM | 7000 RPM | 5000 RPM +/-100 RPM | |
| K24W7 | 2015-2020 Acura TLX | 11.6:1 | @ 6800 RPM | @ 3900 RPM | 7000 RPM | 5000 RPM +/-100 RPM |
K24Y
;Applications:| Engine | Application | Compression | Power | Torque | Redline | i-VTEC engagement | Intake Manifold |
| K24Y1 | 2012-2016 Honda CR-V | 10.5:1 | @ 6000 RPM | @ 4300 RPM | 6500 RPM | ||
| K24Y2 | 2012-2015 Honda Crosstour | 10.0:1 | @ 7000 RPM | @ 4400 RPM | 7100 RPM |
K24Z
;Applications:| Engine | Application | Compression | Power | Torque | Redline | Rev limiter | i-VTEC engagement | Intake Manifold |
| K24Z1 | 2007-2009 Honda CR-V | 9.7:1 | @ 5800 RPM | @ 4200 RPM | 6500 RPM | |||
| K24Z2 | 2008-2012 Honda Accord LX/LX-P | 10.5:1 | @ 6500 RPM | @ 4300 RPM | 6800 RPM | |||
| K24Z2 | 2016-present Proton Perdana | 10.5:1 | @ 6500 RPM | @ 4300 RPM | 6800 RPM | |||
| K24Z3 | 2008-2012 Honda Accord LX-S/EX/EX-L | 10.7:1 | @ 7000 RPM | @ 4400 RPM | 7100 RPM | 5100 RPM | ||
| K24Z3 | 2009-2014 Acura TSX | 11.0:1 | @ 7000 RPM | @ 4300 RPM | 7100 RPM | 5100 RPM | ||
| K24Z3 | 2008-2015 Honda Accord | 11.0:1 | @ 7000 RPM | @ 4300 RPM | 7100 RPM | 5100 RPM | ||
| K24Z4 | 2008-2012 Honda CR-V | 9.7:1 | @ 5800 RPM | @ 4200 RPM | 6500 RPM | |||
| K24Z5 | 2010-2015 Honda Spirior | 10.5:1 | @ 6500 RPM | @ 4300 RPM | 6500 RPM | |||
| K24Z6 | 2010-2011 Honda CR-V | 10.5:1 | @ 6800 RPM | @ 4400 RPM | 7100 RPM | 7200 RPM | ||
| K24Z6 | 2012-2014 Honda CR-V | 10.0:1 | @ 7000 RPM | @ 4400 RPM | 7000 RPM | |||
| K24Z7 | 2012-2013 Honda Civic Si | 11.0:1 | @ 7000 RPM | @ 4400 RPM | 7000 RPM | 7200 RPM | ||
| K24Z7 | 2014-2015 Honda Civic Si | 11.0:1 | @ 7000 RPM | @ 4400 RPM | 7000 RPM | 7500 RPM | 5000 RPM | |
| K24Z7 | 2013-2015 Acura ILX | 11.0:1 | @ 7000 RPM | @ 4400 RPM | 7100 RPM | 7200 RPM |