For modern traffic conditions, dual carrigeways and motorways they are both too slow to be truely safe, along withtheir antique brake sysytems and levels of crash protection.
They are also not green. The engines may provide a reasonable economy, but the pollutants kicked out from a 60 year old engine design over a modern engine which burns the petrol more efficiently, means its frankly a non green option.
So if she wants a dangerous car that pollutes the planet, then fine. If she's prepared to let her partner and kids travel like that, well, thats just negligent and thoughtless…