07/16/2026
The Chrysler Australia Hemi 265 is widely regarded as one of the greatest high-performance inline-six engines ever produced. Introduced in 1971, the 265 cubic-inch (4.3-liter) engine was designed and manufactured entirely in Australia by Chrysler Australia for the locally built Chrysler Valiant range. Unlike the famous American 426 HEMI V8, the Hemi 265 was created specifically for Australian conditions, where durability, performance, and competitive touring car racing were major priorities.
Despite its name, the Hemi 265 did not use true hemispherical combustion chambers like the American HEMI V8. Instead, it featured an advanced wedge-style cylinder head with large, efficient ports and canted valves that delivered outstanding airflow for an overhead-valve inline-six. Chrysler Australia retained the "Hemi" name because the combustion chamber design shared some characteristics with hemispherical concepts while providing excellent combustion efficiency and high-performance breathing.
The engine was offered in several versions, with outputs ranging from approximately 145 horsepower in basic trim to the legendary E49 specification producing 302 horsepower (gross) and around 320 lb-ft of torque. The flagship E49 engine featured three Weber 45 DCOE side-draft carburetors, a high-performance camshaft, higher compression ratio, tuned exhaust manifold, and numerous internal upgrades. The triple Weber induction system delivered razor-sharp throttle response, exceptional airflow, and one of the most distinctive induction sounds of any production six-cylinder engine of its era.
The Hemi 265 found its ultimate home in the Chrysler Valiant Charger, particularly the famous VH Charger E49. Developed specifically for Australian performance enthusiasts and touring car competition, the Charger E49 became one of the fastest production cars ever built in Australia during the early 1970s. It accelerated from 0–60 mph in approximately 6.1 seconds and recorded quarter-mile times in the low 14-second range, making it quicker than many contemporary V8-powered rivals from Ford and Holden.
One of the Hemi 265's greatest strengths was its combination of strong low-end torque and impressive high-RPM capability. While many large-displacement inline-sixes were designed primarily for smooth cruising, the Australian Hemi eagerly revved beyond 6,000 rpm while maintaining excellent torque throughout the rev range. Its broad power delivery made the Charger highly competitive on both the street and the racetrack, particularly on Australia's demanding touring circuits.
The engine earned numerous victories in Australian motorsport and became one of the defining symbols of the country's muscle car era. At a time when larger V8 engines dominated performance discussions, Chrysler Australia demonstrated that intelligent cylinder head design, efficient induction, and careful engineering could allow an inline-six to compete directly with—and often outperform—much larger engines. This achievement helped establish the Hemi 265 as one of Australia's greatest automotive engineering successes.
Today, the Chrysler Australia Hemi 265 remains one of the most desirable six-cylinder engines among collectors and enthusiasts worldwide. Original VH Charger E49 models are among Australia's most valuable muscle cars, while genuine triple-Weber Hemi 265 engines command premium prices due to their rarity, historical significance, and exceptional performance. More than fifty years after its introduction, the Hemi 265 continues to represent the pinnacle of Australian inline-six engineering and stands as one of the finest naturally aspirated six-cylinder performance engines ever built.
