So I went by a car dealership yesterday evening with the intent to buy a used car; upon test driving it, I fell in love with it! This thing was the perfect combination of luxury and sport, and the fact that it was a manual made it all the better. I only have one problem; the price tag. Now, I can put up a sizeable down payment on this thing and drive away with payments in the $600 USD range for the next four years, or I can just walk away. I've decided to make a riddle about the car, and after you guess what it is (if you did any research), do you think I should give it more consideration or just walk away?

British designed, like driving in heaven;

A famous car worldwide, driven by seven.

My heart is pounding, right out of my chest;

Dumping the clutch, while out on a test.

Buying this car, is expensive indeed;

But I want it, desire it, this car I need.

What car am I wanting to buy?

Hint:

A hint you may need, this car is fun; look no further than a union of ones.