July 1991 GT-R N1 Race sho is released (no idea about price)
August 1991 GT-R gets minor changes (4.510.000 Yen)
Feb 1993 V-spec is released (5.260.000 Yen)
Feb 1994 V-spec 2 is released (5.290.000 Yen)
From what I can make out on the GTR owners book, the N1 had no A/C, no ABS, no audio system, had a 2 L surge tank, Nismo metal turbine(same as the Nismo version of '90), bigger disc brakes, rear diff oil cooler kit and it only came in white. 228 were sold.