Hint: it isn't the defroster.
There are a lot of reasons to like the Bentley Continental in its various forms. It is a very comfortable car, and a great pick for turning a long road trip into luxurious experience. But the folks at XCar would like to make a case for the W12 engine as being something you should look to as evidence of the car's brilliance. The wonderfully compact configuration isn't exactly a new idea, but it does make for a different sort of weight distribution and sportier handling than you'd expect in a car this size.
The mere existence of this engine shows a real attention to detail, and goes part of the way toward explaining why it's so much fun to drive.