Are you sure? Cus going off these figures..
Stag
Curb vehicle weight: 1,620 kg (3,571 lb)
RB25DET - twin-cam TURBO (T3 Turbo) (245 to 250 hp and 319 N·m) 180KW
KW/T = 111
R33 4 door
Weight 1390kg
RB25DET - twin-cam TURBO (T3 Turbo) (245 to 250 hp and 319 N·m) 180KW
KW/T = 129
The Stag easily makes it through and the R33 just doesn't but wouldn't a 4 door be heavier? This is all provided these figures are correct of course.