The Capri[not to be confused with the earlier Consul Capri] was I believe based on the MkII Cortina floorpan/chassis.Never owned a Capri but drove plenty and I must say the Fuego[of which I also drove plenty but never owned one]was a far superior car as was the Alfa GTV6 that I did own.Capri could[with the bigger engines-the 1300 versions were just slugs]be "tail happy" and with the V6 versions the front brakes weren't really up to the job,hence a lot of owners changed the calipers to those off the BL Princess.
Hmmm, where to start:
there are bits of mk2 Cortina in the Capri, but a lot more mk1 Escort: the only difference in the front suspension is the track width for example.
Capris don't like changing direction once settled into a turn, but once you've got that covered aren't a problem
Capri brakes are poor, and many were fitted with Princess calipers. But, they don't fit under 13" wheels without grinding them down a bit(and the castings aren't consistent enough to thiat safely in my experience) and the discs are slightly too small in diameter for the pads. I've seen more than one Capri so equipped boil the grease out of the wheel bearings. Increasing the diameter and thickness of the disc from the stock 247mm/12mm(247x20 for 2.8i venteds) is what's actually required but isn't quite so easy to do. The brakes are not helped by the rear mechanisms frequently being seized solid: a long pedal and ineffective hand brake is the sign of this. Fixing it, an hour's work, makes a huge difference.
I never found the Alfa, Manta or Porsche 924/944 to be any better than a much cheaper, more comfortable and better looking Capri. But this was back when a nice 2.8i was easily a sub £1000 car.