The CRDi version of the Tucson is a notch above its petrol powered counterpart. And yes, it consumes less fuel. Please do read niky's take on the Tucson CRDi: bigbigcar.com Review: Hyundai Tucson 4x2 CRDi 2.0 A/T
get the crdi. Though it only has 112hp over the gas 142hp, it has more torque and that's the thing you need more in a compact suv. FYI, the new tucson is the old santa fe body.