This Car Is Related To The One Above because...

The - Compare a cheap car to expensive exotic ones - advertising tactic seems to be a common one. This was Citroen's version.

Esprit was in one of the Bond movies, as was this..

Never seen one before - gorgeous, but, not going to lie that bum sure looks like a Duetto

New to me, the Moskvich Duet

The K Series platform also gave us the Plymouth Reliant, as featured in Ferris Bueller's Day Off (Driven by Principal Ed Rooney):

Ooooo I like the idea of European cars with American lumps I give you the Pantera

And the Cortina had those cool taillights which found their way to the 1963 Ford Lola GT (which I never knew existed and now have to buy a lottery ticket for)

This is a new one for me. I never heard of the Kammback — also known as "Kamm tail" or "K-tail" — it's just an automotive styling feature.
Thanks.
The Kammback is easy to see here on this beautiful

and also on it's possibly even more rare little brother the Citroën GS Birotor


A two rotor GS was launched in 1973. Dubbed the Citroën GS Birotor (also called Citroën GZ), it featured a much more powerful 79 kW (106 hp) Wankel birotor produced by the joint NSU-Citroën Comotor project. This style of motor is noted for its smooth power delivery which complemented the luxurious ride quality of the hydropneumatic suspension. Even better, the engine was small relative to its power, an advantage for Tax horsepower calculations, which drive automobile design in France
The Birotor cost as much as the larger Citroën DS, and 70% more than the standard GS. The fuel economy was worse than the largest DS - the DS23EFI. Since it was not economical for its size, and was launched in October 1973, the exact start of the 1973 oil crisis, the
Birotor version achieved poor sales and was quickly pulled from the market, after 847 units were sold

Well, to quote wikipedia, 

"Fulvia was an aristocratic Roman woman who lived during the Late Roman Republic. She gained access to power through her marriage to three of the most promising men of her generation, Publius Clodius Pulcher, Gaius Scribonius Curio, and Mark Antony. All three husbands were politically active populares, tribunes, and supporters of Julius Caesar. Though she is more famous for her involvement in Antony's career, many scholars believe that she was politically active with all of her husbands."

So a Roman link then Opel Senator.