At first glance, I thought this car was a Lamborghini Espada, or some kind of Maserati, or perhaps even a DeTomaso? As it turns out, it is actually a very rare and short-lived car called a Bitter Diplomat coupe.
The idea for this luxury gran tourer came from Erich Bitter, a German racing driver turned entrepreneur. He started Bitter Automotive in the early 1970s and set about manufacturing passenger cars.