Skogen Racing built this Mk1 Ford Sierra as a sleeper. The car is powered by a turbocharged 2.8 L BMW M50 inline-six. The motor uses a stroker crankshaft, PPF forged rods (M50B28), copper ring head gasket, custom exhaust manifold, and Holset Super HX40 turbocharger. That is backed by a ZF manual transmission and BMW 210 rear end with upgraded axles. Skogen Racing recently strapped the car to the dyno for GZ Racing to tune. The inline-six made 651 hp (485 kW) and 753 Nm (555 lb-ft) of torque to the wheels on 1.63 bar (23.6 psi) of boost and E85 fuel.
Source: Skogen Racing FB page and GZ Racing FB page