Cinq S is bottom of the range with just wheels, seats and an engine
Cinq SX was the same engine as the S but with bodycoloured bumpers and electric windows and central locking etc.
Cinq sporting is the top of the range cinq with a nice 1.1 engine and a leather steering wheel, nicer seats, electrics all round and lowered 20mm etc.
Sportings are so cheap now i dont see why people bother with sxs anymore, the insurance is hardly any different ( i found that the difference between a sporting and SX for me was around 50 quid
Small point of order please.
The early 899 Cinqs in a basic spec did not even warrant an 'S' badge. The 'S' baj was put on basically the same car later on.