How to pronounce“x50”in English

I've already instructed my wife, if I go first; I want "he never owned a cell phone" put on it because. And I'm a dinosaur, I guess, but I enjoy it because, I'll tell a funny storyfirst when I bought my dream car back in 2003. A twin turbo X50 Porsche, 450 horsepower,6 speed that is so fast today I've never floored it; that's how fast it is. When you order a car like that you have to get a slot number because they're made by hand in Germany. And