To be honest a V8 would be WAY better for a smaller esp with weight. I know Hartge made a 1-series with a V8,it had 450bhp 0-100kph in 4.6secs,Max speed of 188mph (it would be much faster if they did some weight reducation and used a 3door not a 5door lol).

 

thats the way the new M3 should come stock - 12.9 1/4 mile is crap these days - almost did that in my 03 e46 with intake

 

Those aren't RS4 seats. They're Recaro Sporster CS seats. Nice seats. I was going to get those for my mini. Look Here