B100 = 'pure' bio diesel (i.e. 100% whereas B80 = 80% bio)
As for running the new 2.2 Td4 ......... not sure ..... don't think LR specify Bio as an option, not even in a 'blended form'
Bio diesel will give you a slight power drop (5-7% according to reports), reduced particulates, HC & CO emissions, but will increase NOx emissions.
(I'll check the owners manual on our lasses Td4 n see what it says)