R33SKYLINE chronological table
1993 (H5) 8/19 R33 type debut (prior-term type)
11/8 < Addition > GTS-4 ( 2 doors / 4 doors )
1994 (H6) 1/28 < Addition > GTS urban liner ( 2 doors )
6/9 < Special specification car > GTS25t
1995 (H7) 1/6 < Part improvement > (Mid-term type)
( 2 doors ) front grille in body color modification. The same rear wing form as latter-term type.
( 4 doors ) front grille and around headlight in smoke silver modification.
As for RB25DET in resin impeller. All the car driver's seat SRS air back standard equipment.
R33 type GT-R debut
< Addition > Aero package
1996 (H8) 1/22

< Minor change > (Latter-term type)
2 doors and 4 doors modification of bonnet hood and front bumper.
( 2 doors ) C.S.R. Adoption of headlight. Rear finisher in body same color modification.
( 4 doors ) adoption of corner ring lamp attaching headlight. Modification of modelling around rear.

All the car dual air back standard equipment.
Rear brake of RB25DE and RB20E on-board car in modification.

6/12 < Special specification car > GTS25
< Special specification car > GTS
1997 (H9) 2/3

< Part improvement >
ABS and long-life water repellency glass (windshield) all the car standard equipment.
AT shift knob modification of the AT all car which excludes the GTS and the 4WD car.

10/7 < Special specification car > GTS25t
< Special specification car > GTS-4
< Special specification car > GTS
December < Special specification car > GT-R
1998 (H10) 5/25 R34 type debut (prior-term type)

R33SKYLINE 2 door grade summary
Grade name (prior-term * mid-term * latter-term * all period)
Type (drive system)
Engine
GTS25t ECR33 (FR) RB25DET
GTS25t ECR33 (FR) RB25DET
GTS25t ECR33 (FR) RB25DET
GTS25t ECR33 (FR) RB25DET
GTS25t ECR33 (FR) RB25DET
GTS25 ECR33 (FR) RB25DE
GTS25 (previous term) ER33 (FR) RB25DE
GTS HR33 (FR) RB20E
GTS (latter term) HR33 (FR) RB20E
GTS urban liner S HR33 (FR) RB20E
GTS urban liner HR33 (FR) RB20E
GTS -4 (all period) ENR33 (4WD) RB25DE

R33SKYLINE 4 door grade summary
Grade name (prior-term * mid-term * latter-term * all period)
Type (drive system)
Engine
GTS25t ECR33 (FR) RB25DET
GTS25t ECR33 (FR) RB25DET
GTS25t ECR33 (FR) RB25DET
GTS25 ER33 (FR) RB25DE
GTS25 ER33 (FR) RB25DE
GTS25 ER33 (FR) RB25DE
GTS25 ECR33 (FR) RB25DE
GTS25 ER33 (FR) RB25DE
GTS25 ER33 (FR) RB25DE
GTS25 (previous term) HR33 (FR) RB25DE
GTS Type-S (latter term) HR33 (FR) RB20E
GTS Type-X LImited (latter term) HR33 (FR) RB20E
GTS Type-X (latter term) HR33 (FR) RB20E
GTS Type-G (prior-term * mid term) HR33 (FR) RB20E
GTS Type-XG 40th HR33 (FR) RB20E
GTS Type-XG (prior-term * mid term) HR33 (FR) RB20E
GTS (all period) HR33 (FR) RB20E
GTS-4 Type-XG 40th ENR33 (4WD) RB25DE
GTS-4 ENR33 (4WD) RB25DE
GTS-4 (all period) ENR33 (4WD) RB25DE
You do not call mid-term type excessively, but it is easy to understand, the sea urchin using, it increases.