Doesnt sound right... anyway nothing is the same when you're comparing old cars.
Just to give TS an idea, I know someone on the forum with another 33 N1 that has 330rwkw with close to 98% injector duty cycle and the only mod he's done are ecu, avcr, catback and cat (not 100% sure about cat but should be right). The only difference between N1s and standard gtrs are the engine, oil cooler, oil pump, water pump and no a/c. The other features doesnt really affect your power as much anyway (kelvar front diffuser etc).
Having said that, thats with an aggressive tune according to him and mine's running a safe tune with 255awkw at less than 90% duty cycle.