Luckily, two of the biggest names in luxury cars start with the letter B: Bentley and Brabus. The Bentley Flying Spur is currently the highest luxury-orientated model in their lineup and even has a petrol-hybrid electric vehicle option. Brabus is the performance side of luxury because they take a normal Mercedes, put way too much power in it, and sprinkle it with some exotic interior bits and pieces; the Brabus Rocket 900 is a 900hp Mercedes S-class with some extra classy interior modifications.