You could make a solid argument that the GT is the “true” Mustang. No compromise V6, and no fancy-pants EcoBoost turbo; the GT packs Ford’s naturally aspirated 5.0 liter V8, with the performance and soundtrack to match.

In GT Premium form, it’s good for 435 horsepower and 400 lb-ft of torque. It’s also matched with a six-speed manual transmission as standard, though a six-speed auto with the de rigueur paddles is a $1k option.
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https://www.slashgear.com/2015-ford-mustang-gt-premium-5-0l-v8-review-07417229/