If you use a metal bar or lump of wood to deliberately batter someone, then provided they’ve not attacked you, it is murder.
Why should using a car as a weapon be any different?
This area of Law really, really does need sorting out. I’ve read about drivers deliberately knocking cyclists/pedestrians over getting away with driving without due care or something else daft. it’s just ridiculous.
Deliberately drive at someone- Murder/Attempted Murder.
Kill someone due to a lack of care and attention for their safety- Manslaughter.
Why isn’t it like that? It is in some other countries I’m sure.