yes they are the same
They do if it is an automatic transmission. The Prelude (except Si) has the same manual transmission as well. The Prelude Si has a slightly different manual transmission, but it will still fit into a...
the Honda del sol is a civic so they do have the same lug pattern and offset
no the Honda 450 has a slight bigger oil filter the 450 has a 116 and the 300 has a 113
the rover model is early rover 200 series ie, 214, 216.