IF YOU think the new Citroen C4 Picasso cannot possibly play hardball against the Honda Odyssey in the compact seven-seater people mover segment, then the French manufacturer suggests that you are not looking at the whole picture. While we can’t comment on the sub-$40,000 petrol version, the $45,000 HDi turbo-diesel with a standard six-speed auto delivers performance, economy and low carbon dioxide emissions, in a smart, spacious, safe, practical and attractively presented package. It makes more sense than most SUVs too. In fact, the C4 Picasso may be the most innovative affordable Citroen in years, as well as, conversely, the one with the most mainstream appeal.