Ford Mustang V8 loses power with new US emission rules, Australia safe for now

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Australian-delivered vehicles are are unaffected for now, but the clock is ticking for high-performance V8s.


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Another nail has been hammered in the coffin of high-performance V8 engines, with the power output of Ford Mustang V8 models set to be downgraded in the US in line with the introduction of new emission regulations.

The standard 5.0-litre Mustang GT and track-focused Mach 1 will each lose an estimated 7kW/13Nm in North American markets as a result of the updates, now producing 335kW/535Nm and 350kW/543Nm respectively.

Meanwhile, the flagship 566kW/847Nm 5.2-litre supercharged Mustang Shelby GT500 – which isn’t offered in Australia – will not be immediately affected.



The loss is caused by a reduced compression ratio in newly-built examples of the 5.0-litre engine, and modifications designed to lower evaporative emissions.

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A spokesperson for Ford Australia told Drive: “Changes were made to US Market Mustang GT models to meet more stringent LEV III (Low Emission Vehicle) regulatory emissions requirements that resulted in a power and torque reduction for the 5.0-litre V8 engine.”

“[However,] Australian-delivered Mustangs will not be affected. The power and torque outputs of 2022 Mustang GT will not change.”

Australian 5.0-litre Mustangs develop 339kW/556Nm in GT guise, or 345kW/556Nm in the flagship Mach 1, owing to tweaked engine tunes and measurement systems in the local market.



William Davis has written for Drive since July 2020, covering news and current affairs in the automotive industry. He has maintained a primary focus on industry trends, autonomous technology, electric vehicle regulations, and local environmental policy. As the newest addition to the Drive team, William was brought onboard for his attention to detail, writing skills, and strong work ethic. Despite writing for a diverse range of outlets – including the Australian Financial Review, Robb Report, and Property Observer – since completing his media degree at Macquarie University, William has always had a passion for cars.

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