This is a list of piston engines developed, independently or with other car companies, by Toyota Motor Corporation. Engine codes Toyota has produced a wide variety of automobile engines, including four-cylinder and V6 engines. The company follows a naming system for their engines: The first numeric characters specify the engine block's model (usually differed by displacement) The next one or two letters specify the engine family 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. Examples: 2NR-FE 2NR – Second model in the NR engine family F – Normal cylinder head DOHC E – Multi-point fuel injection 3S-GTE 3S – Third model in the S engine family G – Performance cylinder head DOHC T – Turbocharged E – Multi-point fuel injection 2UR-FSE 2UR – Second model in the UR engine family F – Normal cylinder head DOHC S – D4-S Gasoline direct injection E – Multi-point fuel injection 3ZR-FAE 3ZR - Third model in the ZR engine family F - Normal cylinder head DOHC A - Valvematic variable lift intake head E - Multi-point fuel injection 1KD-FTV 1KD – First model in the KD engine family F – Normal cylinder head DOHC T – Turbocharged V – D-4D common rail direct injection (diesel) The use of "G" to denote twin cam engines was decided on in 1971, with the renaming of the 10R into 8R-G. Before that, twin cams had received separate numerical codes. Note: In 1987, Toyota 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. Starting in 2015, the designations after the dash have a maximum combination of three letters, even though there are more suffixes applicable. This is particular when newer engine technologies are introduced. Case in point, both the 2GR-FKS and