Worst Holden ever turns 50
By Byron Mathioudakis · 28 Jun 2026
Fifty years ago, on July 1, 1976, the worst new Holden up to that point was released, the HX series. And everything changed.Not coincidentally, it was also the date that all new internal combustion engine vehicles except those under 850cc in capacity or with liquid petroleum gas had to comply with stricter emissions standards known as Australian Design Rule 27A (ADR27A).This law proved to be a nightmare for parent company General Motors-Holden’s (GMH) Ltd.With fuel consumption up, power down and prices jumping to cover the extra technology necessary to meet the new regulations over the preceding HJ series, Holden’s engineers struggled to make its 1960s-era engines cope with the required updates in what was the country’s best-selling car line since the early 1950s.Critics and road testers alike savaged the HX as a result, accusing Holden of being cynical and out of touch, though it managed to hang on to the top spot for 1976.“Perhaps we would be better off with dirty engines and improved driveability,” quipped Wheels magazine editor Peter Robinson.Unfortunately for GMH, three unexpected things also happened right around that time that led to fundamental shifts in consumer tastes.Firstly, Japan was ready to launch its next phase of world-beating passenger cars that could easily meet ADR27A, headed by the original Honda Accord that almost single-handedly elevated that country’s entire industry overnight.Others followed in its footsteps, including the Mazda 323 and Datsun Skyline.Yet it was the shock success of the Chrysler Sigma, supplied by Mitsubishi, that became GMH's second big setback, shooting up the charts to a podium finish soon after its 1977 launch, and stayed there for half a decade.The Sigma lured many former and would-be Holden owners away in droves, particularly from the brand's waning Torana and Sunbird models it competed directly against, and even cannibalised Chrysler’s own Valiant in the process. Sigma was an automotive phenomenon that led directly to the iconic Australian-developed Magna later on.And last but not least, arch-rival Ford, which had been nipping at the Holden’s heels with the Falcon since the XB Falcon snatched number one for just one month in late 1973, had pulled out all stops in making the succeeding XC series demonstrably superior. GMH certainly wasn't expecting that.While the change from HJ to HX was little more than a fussier grille, revised instrumentation and several other, mostly minor, alterations, Ford expensively reengineered its engines to make them better than before, not worse. And it also redesigned the Falcon's nose, tail, back doors and dashboard, for a far-fresher look and feel.Plus, the XC launched the Fairmont GXL sports/luxury flagship. In the spirit of the legendary Falcon GTs, contemporary reviewers declared it as one of the greatest Australian-made family cars to date.In stark contrast to the basting the HX endured, XC sales flourished, with the Falcon becoming Australia’s best-selling car in 1977, period – an achievement it managed again from 1981 through to 1989, signalling the start of Ford Australia’s halcyon days.Half a century after the HX’s painful birth, perspective shows us a company grappling to deal fast enough with rapid change – something that Holden would pay the ultimate price for by 2020.Yet, to GMH’s credit, the more-comprehensively changed HZ series that followed in October, 1977, addressed most of the HX’s issues, whilst leap-frogging the Falcon in both sales as well as a driver’s car, thanks to chassis tweaks marketed to great effect using a tagline borrowed from Pontiac in the US called Radial Tuned Suspension.A stunning turnaround, it restored the Holden to the top spot for 1978, in time for the smaller, Opel-based VB Commodore to turn the market on its ear leading into the 1980s.A brief hiccup then largely due to ADR27A, a total of 110,669 HXs were built. And though the series has long lived in the shadow of the massively popular HQ/HJ models before it and the beloved HZ afterwards, 50 years later, its appeal is palpable. Who wouldn't have one?As a colourful piece of Australian motoring history, recognition is deserved. If nothing else, the garish Monaro LE two-door coupe runout edition remains one of the most 1970s things ever to happen in local motoring folklore!And it was the first Holden that actively attempted to minimise its emissions impact. That’s got to be worth celebrating. Happy 50 birthday, Holden HX!