What is the difference between a small car and sedan?
A sedan (or saloon here in UK) has an engine compartment, a
passenger compartment and a separate boot (or trunk as I imagine
you would want to call it). A 'small' car is dependent much more on
the market for which it is destined. What you might call 'small' in
US, might well be considered medium size here. What we would call
'small' would typically be under 13' 3" long (4mtr in
continental-speak), and would normally have an engine size of
1.3ltrs.
Such vehicles would be:
Ford Ka
Smart
Vauxhall Corsa
Renault Twingo
Citroen C1
Nissan Micra.
Invariably, small cars in UK have a hatchback tailgate
arrangement, rather than a separate boot, as this is what market
forces demand.