And I agree that ISG, stop/start is great. I don't have A/C, but even with just the blower or stereo on, it won't always activate. The missus gets annoyed as she sits shivering in winter traffic jams while I make sure the engine will stop when the car does!
The Outlander is petrol/hybrid, plug in only. With the price of diesel now below petrol, you'd have to get over 62 MPG to match the fuel costs, and the only way to do that with a plug is to charge it every night (even then you only get 20 or 30 miles per charge) The smallest cheapest hybrid similar size to your Hyundai is probably an Auris or a Yaris perhaps.
I think there is a Jazz too. When I bought my i20, I could have put down £2 000, but they d only take a £1k deposit. 1-2 months later I could have stuck another £1-2 grand to it and got a Mk1 insight. Thats what I would do if in the same situation, but with knowledge of the insight! If it turned out to be no good, I would have found out in year or 2 and gone for a new small diesel again. Possibly a MiTo. However, I m sticking with the hyundai for 10 years, thats the plan...
Most car magazine group tests of hybrids tend to compare them with diesel manuals, but don't take account of the fact that hybrids are automatics. Completely different animals, and with modern driving conditions an automatic is a large bonus.
Incidentally, checking my accounts for the last 10 years to December 2014, I've spent an average of €1470 per year on fuel (I usually do about 20,000 km a year) - so compared with the overall cost of motoring, a 10% rise/fall in fuel consumption is not a big deal
I disagree with the comment regarding the automatic gearbox, it's one of many reasons hybrids have never appealed to me. They are fine for disabled people and the very elderly, but I find them nasty to drive, noisy, unresponsive, they make that dreadful droning noise and in general have higher emissions and use more fuel too. There are several situations when they are very dangerous too, so I would never own one unless it's duel clutch with manual selector, but I still prefer having a clutch and gearstick any day.
I agree about automatics being a poor choice - although a colleague has mentioned the new Smart he test drove having dual clutch 6 speed auto with manual override, said it was very good (though he prefers power to economy). Cuius, if 147 Euros is no big deal, you must be getting a better wage than I am! I always think of it as losing a frivolous item I could otherwise afford - the difference between owning or not owning a pedalo!
The whole point of improving economy,- whether in a diesel or hybrid, is surely geared at spending as little money on fuel as possible.