Our experience shows the 420i can breach 40mpg if you drive relatively carefully, while the M440i will get well into the thirties. The discontinued 430i split the difference at 42.2mpg. Diesel ...

The M440i is a truly fabulous thing with power that’s still very useable on real roads. The 4 Series was previously available in 430i guise. It has a 258hp version of the 2.0-litre engine, which gets ...

Department of Chemistry & Biochemistry, University of California San Diego, 9500 Gilman Dr, La Jolla, California 92093, United States ...