abstract
| - Toyota Motor Corporation has produced a wide variety of automobile engines. The company follows a simple naming system for their modern engines: 1.
* The first numeric characters specify the engine block's generation 2.
* The next one or two letters specify the engine family 3.
* The suffix (separated by a dash) specifies the features of the engine: Note: Other manufacturers may modify the engine after it has left the Toyota factory but the engine still keeps the original Toyota designation. For example, Lotus added a supercharger to the 2ZZ-GE in some versions of the Lotus Elise and Exige but it is still labelled 2ZZ-GE, not 2ZZ-GZE.
* 4A-GE 4 - 4th generation engine in the A engine family A - The Engine Family it is in G - Wide-angle dual camshaft E - Electronically Fuel Injected
* 22R-TEC 22 - 22nd Generation Engine In The R Engine Family R - The Engine Family it is in T - Turbocharged E - Electronically Fuel Injected C - California Emission Controlled The use of "G" to denote twin cam engines was decided on in 1971, with the renaming of the 10R into 8R-G. Before, twin cams had received new numerical codes.
* Note: Toyota, in 1987, began assigning dual letter engine codes to some of the "engine family" categories in some engine lines, particularly six cylinder models. This can create potential confusion. E.g. 1MZ-FE - This is not a supercharged, narrow angle, fuel injected M-series engine, but a narrow angle, fuel injected MZ-series engine. Confusion is easiest to avoid when using the dash to separate between the engine series and its own characteristics: for instance, 1MZ-FE rather than 1M-ZFE.
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