1 BDAs are old
People think modern engines are better, producing more power but fit modern engine management and EFi to a BD and they’re just as good — they were way ahead of their time.
2 They’re all peaky
Just because it’s a BD doesn’t necessarily mean it’s a racing engine with loads of power — they started with 120 bhp. Not all BDs are the same.
3 They’re unreliable
Depends who built it, how old, what the components are, how much work its done, whether it’s been abused — a well built engine shouldn’t be!
4 They leak oil everywhere
Again not if they’re built properly — experience tells you where they do and how to fix it but we don’t want ours leaking as it ruins the paint!
5 They’re expensive
They are brand new, but built right, they’re as reliable a race engine as you can get — insurance never came cheap!