autoevolution 5 Apr 2021, 8:09 UTC · by Ford launched its fifth and newest installment of the Mach 1 Mustang for the 2021 model year, and on paper, it is one of the best all-around S550 Mustang packages out there. Also, this is a nameplate that hasn’t been used since 2004, which is why it now garners so much attention. 6 photos Short of the flagship Shelby GT500, the Mach 1 is currently the most interesting Mustang you can buy. It uses the same 5.0-liter Coyote V8 unit as the GT, putting down 480 hp (486 PS) and 420 lb-ft (569 Nm) of torque, which is also what you get in the Bullitt.