The Granada mk3 suspension is almost completely the same as the Sierra. It's only the front and rear arms that are wider to give it a wider track than the Sierra. The front arb is also wider due to that reason. And the rear arms give more camber on the Sierra because of the higher ride height of the Granada. The brakes are also the same as on the Sierra.
On the froge-eye Scorpio the front suspension is completely different. It doesn't have the arb running along the rear, but it has A-type front arms and the arb fitting up front connecting to the struts through droplinks. The rear is also different from the Sierra, the beam is wider and the arms are also different and uses wider springs at the bottom (the top is the same diameter as before). On the later type frog-eye Scorpios the beam is completely different as they changed the way the diff was bolted to it. The rear brakes (calipers, discs, bearing carriers and hubs) on the 24v are all the same as the Cosworth 4x4. The normal versions use the smaller 253 mm discs.
Sierra Cosworth coilovers should fit the rear arms, but I'm not sure on the front.