If memory serves correctly the H reg Granada would have been either a 2.4 or 2.9, Ford made the engines slightly bigger to go with the trend of the time while claiming improved emissions, performance and economy.
As for the "bug-eye" Scorpio, my first thoughts on those were a squashed, wide-mouthed frog. They haven't changed!
In The Sweeney, Ford had supplied a lot of the cars used, hence the now-iconic Consul 3000 GT used by "Regan and Carter" and the sponsorship by Ford was fantastic advertising for them. Even now many blokes of a certain age hanker after a 3.0S Capri so they can do a "running slide" over the bonnet and then jump in and drive off like they've just stolen it - or are Martin Shaws stunt driver double.
About that time BL saw Fords increased sales and came to a deal with Mark One Productions, the people who actually made The Professionals, to supply cars for the series.
Sadly in true BL fashion of the time, much penny-pinching was involved and instead of the latest cars, carefully prepared for reliability and so on, they got what they were given which from what i have gleaned from reading on the web about it, was probably the factory mules given a spruce-up and that was it. Many were unreliable causing production problems with the program so Ford jumped in with a deal that wasn't refused.
It's what happens when you get aristocracy running car companies and thinking tv is only for the lower classes that can't afford to drive and should make do with whatever scraps they are given. Very short-sighted but that was the way BL was managed at the time.
If it hadn't been, the P6 would have become the SD1 much sooner, perhaps even from launch, there would have been a Triumph Lynx (3 door hatchback TR7), the Princess would have been launched in 1974 ish with the "O" series instead of not getting it until 5-6 years later, possibly there would have even been a 16v M or even T series Princess and all this might even have paid for the Maestro styling committee to actually meet so they could see what everone else was doing!