It was wider and longer than previous Holdens, offering a big increase in passenger and load space. It was engineered entirely in Australia and featured higher equipment levels, larger self-adjusting brakes, optional front discs (a factory fitted option for the first time), new ball joint front suspension, alternator and two-speed Powerglide auto transmission.
Externally, you either loved or hated the controversial design and styling. The HD had modern lines and included curved side panels and side window glass, but the prominent front and rear guard extensions drew criticism as "people cutters" for their potential impact on pedestrians.
Inside, the HD offered more room than ever before in a Holden and was a true six seater. Additional interior space was created by moving the engine forward, employing a flatter firewall and lower transmission hump.
Despite these increases, the wheelbase was only 1-inch longer than the EH, the exterior 3-inches longer and 2-inches wider. Front and rear track was the same as the EH. The full range of engines and transmissions were available on all models, with the exception of the 149 engine, which was not available on the Premier.
The most interesting mechanical feature was the more powerful 'X2' engine. An option for all models, the X2 developed 105kW (19kW up on standard) by virtue of twin carburettors, a modified camshaft, new manifolds and a low-restriction exhaust. On the transmission front, the Hydramatic three-speed auto was replaced by the Powerglide two-speed.
With a choice of three engines, two gearboxes and an expanded options list, the HD gave buyers the greatest choice yet. In 1965 Holden achieved its best sales month on record, with over 19,000 HDs registered in May '65.
In brief: 1965 HD Holden
Introduced: February 1965
Vehicle Type: Front engined, rear wheel drive
Engines: 2.45 litre six cylinder '149', 2.95-litre six cylinder '179' and 2.95-litre six cylinder 'X2'.
Transmissions: Three-speed manual gearbox and two-speed Powerglide automatic.
Model line-up: Standard sedan, Special sedan, standard station wagon, Special station wagon, Premier station wagon, panel van and utility.
Price at introduction: Manual _1,160 ($2320) standard sedan Identification: All new body with horizontal slatted grille split by vertical bar bearing Holden badge; protruding front quarter panels extend past headlights and merge with front bumper.
Total number built: 178,927