Torque is directly proportional to power, related by angular velocity. So τ Nm of torque at angular velocity ω rad/s will give you power P = τ·ω in watts. In fact this works for three-dimensional τ and ω if · is the scalar product.
Oh and an RPM of N is equivalent to angular velocity ω = N·π/30.
"Compared to the current lineup of SkyActiv-G engines, the SkyActiv-X line should use between 20 and 30 percent less fuel."
http://newatlas.com/mazda-skyactiv-x-compression-ignition/50...