Mercedes does the same thing, they offer a turbo four and two V6s in the C and E class. The smaller V6 is a 3-litre and only has 30hp over the four. Difference is power delivery, the NA engine is smoother and has no turbo lag.Wait so the V6 only has 50hp more than the 4 Cyl? whats the point of that. A turbo 4cyl with 276hp should be enough.
It just doesn't makes sense to offer those three engines.