Designed by Noriyuki Nishida, the ZZII was intended to be the bigger and faster version of the ZZ, but it failed to enter production and remained in the prototype stage.
The engine's displacement was increased from its original 2.6 L (2568 cc) to 2.7 L (2700 cc),[a] as well as other modifications to increase power including forged aluminum pistons with titanium-coated rings, new connecting rods with inverted H section, lightened and balanced crankshaft, racing ignition, polished valve seats, metal head gasket, re-profiled cams with higher lift and improved timing, reinforced valve springs, new ECU, improved intercooler with Skyline N1 water pump, new Garrett turbocharger, more powerful injectors and fuel pump, and a 3.5" catback Fujitsubo exhaust with Tommykaira exhaust tips.
[3] The power is delivered to all four wheels by a 6-speed Getrag manual transmission derived from the fifth generation (R34) Skyline GT-R together with the ATTESA ET-S Pro system, also making the car all-wheel drive.
Autobacs estimated it to weigh 1,200 kg (2,646 lb), due to the all-wheel drive system and to the bodywork of the prototype being made of fiberglass.
[2][5] After its unveiling at the 2002 Tokyo Auto Salon, Tommykaira promised to sell the car in high volumes, with the company already having an organized delivery schedule after the show.