My 20-year old Mitsubishi 1.8i Space Runner automatic goes on and on like a faithful servant, but I fear replacement time will come next year. I wouldn't buy a diesel because of pollution but I am attracted to the new generation of three cylinder one-litre petrol-engined vehicles. Because I like a high driving position I'd consider the Ford B-Max, or EcoSport or the new Volkswagen Taigun, when the latter two eventually arrive. But I'm concerned about any turbo in town, given that 80 per cent of my driving is short run in inner London - and I'd prefer some form of automatic. Any comment or advice, please?