[Keto]

I agree with the vast majority of posters here about efficiency. There is another thread currently on the first page talking about the theoretical future RS4/RS5 and how it will "be faster for sure." To me the great question is when will somebody get serious about weight and efficiency rather than just slapping bigger turbos or displacement on the engine. A 30-35 mpg car that has M3 level performance would be a huge seller imho. If the Tesla ever really comes to fruition, watch out. A $70k M3ish 4 seat car with a performance electric engine would have me sell my future M3 in a heartbeat.