Cosmo at least had an aesthetic. Jazz mags were a little utilitarian 

Classiest was Mayfair IMO. You’re probably right that if going downmarket from there it was probably best to go for sthg like Razzle with a focus on improbably buxom serving-wenches in M&S skimpies

Club International or "CI" to the readers.. and Razzle models in M&S?  no chance, C&A

Am I alone in wondering why the UK arm of Ford Motor Company chose to name two of its small car offerings after grot mags?

To be fair, they did have a Spanish / Italian naming theme going on, so Fiesta is excusable, and not out of place.

I’m unable to explain Escort. 

Club for the piccies, Mayfair for the stories

Ford gives you more 

at the bottom end of the market, Firsta and Escort (the magazines) were just grime ubbish, but Razzle, while just as cheap, was somehow both more humorous and, IIRC, a bit hornier 

Shout out to Kays Catalogues. 

It all went wrong for them as soon as the 'Blackwall Tunnel' became mainstream.

Grime is why they were/are good.  I still occasionally buy a Razzle at the petrol station and still get the same buzz.

Buzz moonlights in Razzle? Huge if true.