This is a very special edition of a hugely popular (almost cult status) Holden Commodore.
At the time Australian Touring Car Racing was all the go, and Holden and Ford battled it out at racetracks around Australia regularly. The Holden Pseudo-Factory Team (led by Peter "Perfect" Brock) was imaginatively called the Holden Dealer Team, hence the HDT designation.
The HDT cars were assembled in Dandenong, Melbourne, then sent to Port Melbourne where they were lovingly massaged by the HDT Special Vehicles team into the Homologation Specials we see here.
Only 500 were built, and they are quite rare now.
This car has the Holden 5.0 Litre V8, which was tuned by HDT to produce 210hp (160kW).
Only three colours were available - White, Red or Black, paying tribute to Marlboro, who were HDT's main sponsor at the time.