Question: Which year was the more recent engine series, the Honda K or Honda H, introduced?

<P0-S0> CVCC is a trademark by the Honda Motor Company for an engine with reduced automotive emissions, which stood for "Compound Vortex Controlled Combustion". <P0-S1>  The first mention of Honda developed CVCC technology was done by Mr. Soichiro Honda February 12, 1971, at the Federation of Economic Organizations Hall in Otemachi, Chiyoda-ku, Tokyo. <P0-S2>  Honda's engineers at the time, Mr. Date conferred with Mr. Yagi and Mr. Nakagawa about the possibility of creating lean combustion via a prechamber, which some diesel engines utilized. <P0-S3>  The first engine to be installed with the CVCC approach for testing was the single-cylinder, 300 cc Honda EA engine used in the Honda N600 hatchback in January 1970. <P0-S4>  This technology allowed Honda's cars to meet Japanese and United States emission standards in the 1970s without a catalytic converter. <P0-S5>  A type of stratified charge engine, it first appeared on the 1975 "ED1" engine. <P0-S6>  As emission laws advanced and required more stringent admissible levels, Honda abandoned the CVCC method and introduced PGM-FI, or Programmed Fuel Injection on all Honda vehicles. <P0-S7>  Some vehicles in Japan had a combination of electronically controlled carburetors, called PGM-Carb on specific, transitional Honda D, E and ZC engines. <SEP> <P1-S0> The Honda Rafaga series CE4 and CE5 was a compact 4-door sedan sold only in Japan by Honda, introduced in January 1993, and used the same 5-cylinder engine that was used in the Honda Inspire and the Honda Vigor and shared a platform with the second generation CE series Honda Ascot. <P1-S1>  "Rafaga" is Spanish for "gust" or "blustery". <P1-S2>  The engine is installed longitudinally, the same configuration used in the Vigor and Inspire. <P1-S3>  The Rafaga was third in Hondas hierarchy of sedans, and a sister car to the Ascot, which was sold at the "Honda Primo" dealership network. <P1-S4>  The Rafaga was sold in Japan at "Honda Verno" dealerships, and was one level up from the Honda Integra. <P1-S5>  As with other Honda products, the Rafaga used double wishbone suspension at the front and rear wheels. <P1-S6>  The "2.5 S" trim level came with a front suspension upper strut brace in the engine compartment. <P1-S7>  In Japan, the smaller G20A engine used regular grade fuel, while the larger G25A engine used premium grade fuel. <SEP> <P2-S0>  It is largely derived from the Honda F engine with which it shares many design features. <P2-S1>  Like Honda's other 4-cylinder families of the 80s and 90s, It has also enjoyed some success as a racing engine, forming the basis of Honda's Touring car racing engines for many years, and being installed in lightweight chassis (such as the Honda CRX) for use in drag racing. <P2-S2>  The F20B is technically coded as part of the F-series family of engines; it is basically a destroked version of the H22A. <P2-S3> The Honda H engine was Honda's Larger high-performance engine family from the 1990s and early 2000s. <P2-S4>  It was developed by Honda to be able to enter into the 2-liter class of international racing. <SEP> <P3-S0>  The K series engines are equipped with DOHC valvetrains and use roller rockers to reduce friction. <P3-S1> The Honda K series engine is a four-cylinder four-stroke engine introduced in 2001. <P3-S2>  The engines use a coil-on-plug, distributorless ignition system with a coil for each spark plug. <P3-S3>  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. <P3-S4>  The cylinders have cast iron sleeves similar to the B-series & F-series engines, as opposed to the FRM cylinders found in the H-series and newer F series engines found only in the Honda S2000.