Caporegime
the vast majority of cars on the road use an iron block
Do they?
BMW petrol engines since the introduction of the M52 have been an aluminium block.
BMW Diesel engines of the current generation (N47, N57), have an aluminium block.
VAG FSI engines are an aluminium block.
A lot of VAG Common-Rail TDI engines have an aluminium block (3-cylinder and 4-cylinder for sure, not certain on the V6/8/10).