welp, no one's covered it, so i will
ENGINE CODES
SOHC- single overhead cam
DOHC- dual overhead cams
SC- supercharged
TC- turbocharged
NeoVVL- nissan variable valve timing (think vtec)
in order of displacement, some not offered in US due to emissions
GA16de-1.6 litre four cylinder DOHC
SR16Ve- 1.6 litre four cylinder DOHC NeoVVL
QG18de- 1.8 litre four cylinder DOHC
SR20de- 2.0 litre four cylinder DOHC
SR20deT- 2.0 litre four cylinder DOHC TC
SR20VeT- 2.0 litre four cylinder DOHC TC NeoVVL
KA24de- 2.4litre four cylinder DOHC
KA24e- 2.4 litre four cylinder SOHC
RB25de- 2.5 litre inline six cylinder DOHC
RB25deT- 2.5 litre inline six cylinder DOHC TC
RB26deTT- 2.6 litre inline six cylinder DOHC twin TC
VE30e- 3.0 litre six cylinder SOHC
VG30e- 3.0 litre six cylinder SOHC
VG30de- 3.0 litre six cylinder DOHC
VQ30de- 3.0 litre six cylinder DOHC
VQ30deK- 3.0 litre six cylinder DOHC variable intake
VG33e- 3.3 litre six cylinder SOHC
VG33eR- 3.3 litre six cylinder SOHC SC
VQ35de- 3.5 litre six cylinder DOHC
VQ40de- 4.0 litre six cylinder DOHC
VH41de- 4.1 litre eight cylinder DOHC
VH45de- 4.5 litre eight cylinder DOHC
VK45de- 4.5 litre eight cylinder DOHC
VK56de- 5.6 litre eight cylinder DOHC
and jumbojim?
you forgot
SNAFU