Unfortunately, all manufactureres use different jargon and letter combinations to denote either a trim level or an engine specification. Just check these out..
VTEC - Honda. "
Variable Valve
Timing and
Electronic Lift
Control"
Zetec - Ford. Used to denote their sportier models and is used to make people think they are getting a VTEC system (as it sounds similar).
VVC - Originally Toyata -
Variable
Valve
Control
VTi - Mostly Citroen. Denotes their sportier models
GT - Anyone.
Grand
Tourer (or
Gran
Turismo)
GTi - Originally Volkswagen. Used on the Golf Mk1 it denotes
Grand
Tourer
Injection. It was to symbolise their engines having fuel-injected systems.
dCTi - Honda -
desiel
Common
Rail
injection
Type-R - Honda - Denotes a specially racing-inspired/tuned model version (ie Racing)
Type-S - Honda - Denoes a less-powerfull version of the above (ie Sport)
And (my favourite
)
R34 GT-R vspec with ATTESA-ETS and Super-HICAS - Exclusive to the daddy of all sports cars, the Nissan Skyline. This model is the bees-knees edition made between 1998 and 2002. ATTESA-ETS is the complex four-wheel computer controlled differentials and torque-transfer system with the Super-HICAS being the (equally) complicated four-wheel steering system. To add more letters to the equation the engine was a DOHC (double-overhead cam) Twin-turbo 6-cylinder inline.