The 182 is the latest model. Thats enough to make many people choose it over a 172, or indeed swap their 172 for one.........
The 182 is more evolved than the 172/Cup (although not much), somewhat of a natural progression imho. Renault have cunningly take the best aspects of the 172 and the 172 Cup, and come up with an excellent compromise between the two.....
But as I read somewhere just becuase the 182 is better, it doesnt mean the 172 is bad.... and as far as second hand goes, there are some absolute bargain 172/Cups about.....
Just my 2p....
Oh, and I have a 53 plate 172 for sale if anyones interested...... price for part-ex against a 182 is not what Id hoped...