Unless the diesel engine is exhaust-manifold-in-head, repeated short runs from cold starts are likely to result in DPF problems so, long-term, you would be better off with a petrol engine. The reason for the current shortage of petrol engines is EC CO2 regulations that impose fines on car manufacturers if their corporate average CO2 is more than 130g/km. Diesels generally emit less CO2, hence the dearth of big cars with petrol engines. Jaguar is working on new 2.0-litre petrol and diesel engines for Jaguars and Land Rovers. So is Volvo, and so is Ford.