This rear-wheel-drive platform is cost-effective and suits an American sedan better than front-wheel-drive alternatives.
The powertrain could mirror the Mustang's lineup, including a turbocharged 2.3-liter EcoBoost and a 5.0-liter Coyote V8, with the possibility of a manual transmission.
Ford's strategy now focuses on passion-driven models like Mustang and Bronco, moving away from mass-market sedans like the Focus and Fusion.
Farley recently described the current lineup as "the most passionate" in the company's history.
The Mach 4 could reignite a rivalry with General Motors, which is reportedly reviving the Chevrolet Camaro as a four-door.
The Dodge Charger sedan is another competitor, adding a V8 option.
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Ford hasn't announced a debut date, but production could start between 2028 and 2029. Enthusiasts can expect teasers and spy shots in the meantime.