Holden HX Series (1976): A Necessary Evil in Australian Automotive History
"Perhaps we would be better off with dirty engines and improved driveability."
— Peter Robinson, editor of Wheels magazine
The Launch
On July 1, 1976, Holden released the HX series, marking a significant—and controversial—turning point for the Australian automaker. The HX was the first Holden to comply with Australian Design Rule 27A (ADR27A) , the country's stricter new emissions standards for motor vehicles.
Succeeding the HJ series, the HX incorporated a new grille, revised instrumentation, and—most critically—new emissions control technology. These changes, however, came at a steep cost.
Performance Trade-Offs
General Motors-Holden (GMH) faced immense difficulty adapting its 1960s-era engines to meet the new regulations. Critics and road testers described the HX as inferior to its predecessor due to:
- Increased fuel consumption
- Reduced power output
- Higher prices
The core problem was clear: emissions compliance had forced engineering compromises that hurt the driving experience.
A Changing Market
The HX launched into a rapidly evolving automotive landscape. Several forces reshaped the Australian market:
- Japanese manufacturers introduced competitive models (Honda Accord, Mazda 323, Datsun Skyline)
- The Chrysler Sigma (supplied by Mitsubishi) gained significant popularity
- Ford redesigned its Falcon (XC series), which would become Australia's best-selling car in 1977
Despite widespread criticism, the HX remained Australia's best-selling car line for 1976 —a testament to Holden's dominant market position at the time.
What Came Next
In October 1977, Holden released the more comprehensively updated HZ series. The HZ addressed many of the HX's issues and achieved strong sales, becoming the top seller in 1978. It introduced Radial Tuned Suspension—a marketing term borrowed from Pontiac that significantly improved ride and handling.
Legacy
A total of 110,669 HX units were built. The series has since been overshadowed by its predecessor (the legendary HQ/HJ) and its successor (the much-improved HZ).
Still, the HX is recognized as a notable piece of Australian automotive history—a model that had to exist so Holden could navigate the transition to cleaner engines. Among collectors, the limited-edition Monaro LE two-door coupe stands out as the most distinctive model from the series.