As someone with a mild obsession with car badges, I noticed something a bit weird on the new Audi A5. No, not the fact that it replaces the A4 altogether. On the regular A5, there's a red graphic ...

All of Audi's other 45 TFSI models produce more power, but share the same 45 TFSI badge. The A4, A5, A6, Q5, and Q7 45 TFSI models all use a 2.0-liter inline-4 that produces 261 horsepower and 273 ...