text: A good example of an engine where not all of the feature designation spots are used is the L28ET engine. The two features listed are electronic port fuel injection designated with the "E" and the presence of a turbocharger designed with the letter "T". The engine has a single overhead camshaft so there is no "D" listed in the name; the camshaft type designation place being left out completely. Nissan does not have a letter designation for the SOHC configuration so the camshaft configuration type is assumed as SOHC if no letter is present.
  Another example is the MR16DDT engine, which has feature designations that describe an engine with dual overhead camshafts, direct cylinder fuel injection and a single turbocharger.
  Lastly, there are engines built specifically as power generators for electric motors, designated with the lowercase "e". The HR14DDe engine is a good example of this, as this engine was purposely built for use with the EM57 electric motor as a power generator. The feature letters describe it as an engine with dual overhead camshafts, direct cylinder fuel injection with variable valve timing (bear in mind that the "V" designation is not used here, as that is used for variable valve lift) and is used as a power generator for electric motors.
  Gasoline engines
  Straight-3
  2010–present Nissan HR engine — 1.0/1.2/1.4 L — HR10DDT, HR10DE, HR12DE, HR12DDR, HR14DDe (See Straight-4 below for other HR engines)
  2014–present Nissan BR engine — 0.6/0.8/1.0 L — BR06DE, BR06DET, BR08DE, BR10DE
  2021–present Nissan KR engine — 1.5 L — KH5T, KR15DDT
  Straight-4
  Nissan's Straight-4 engines include:
  1931–1964 Datsun sidevalve engine — 495/722/747/860 cc — Type 7, Type 10, D-10, B-1
  1952–1966 Nissan D engine — 1.0/1.1/1.2 L — D/D10, D11, D12