You can probably blame emissions rules for the European 2021 Ford Mustang Mach 1 having less power than its US cousin.
In Europe, the Mach 1’s 5L V8 has 338kW (454hp) and 529Nm (390 lb-ft). The US version has 359kW (481hp) and 569Nm (420 lb-ft), or an extra 20kW (27hp) and 40Nm (30 lb-ft).
The Mach 1 has a 6-speed Tremec manual or 10-speed auto. It also has 19-in wheels with Michelin Pilot Sport 4 tires, retro styling parts, improved aero, and track focused suspension.
In Europe the RWD Mach 1 has a 0-100km/h time of 4.3s, and a top speed of 250km/h (155mph).