2015 Alpina D4 Biturbo & B4 Biturbo testing on the Nürburgring!

On the 13th of May 2014 we filmed two Alpina’s on the Nürburgring. Both cars were based on the BMW 4-series, but probably with different motorization. OAL BY 305 is probably the normal B4 Biturbo that’s already for sale, but we believe the OAL BY 162 is a future diesel variant which would be the new D4 Biturbo. Alpina already produces a D3 Biturbo based on the current BMW 3 series, and in the past they also produced a diesel version based on the 3-series Coupe, so it would make sense i