Looking for a luxury car that won’t cost the earth? The new Audi A6 Ultra could definitely be worth considering. According to Audi, it is up to 80 kilograms lighter than its predecessor and has been developed with “the single-minded pursuit of unparalleled efficiency." And the result of all that single-mindedness is lower fuel consumption and fewer CO2 emissions, which Audi claims will fall by some 14% from a standard model. Professor Dr Ulrich Hackenberg, Audi’s head of development, said: "The latest TDI (turbo-charged direct injection) technology, ultra-efficient transmissions, advanced exhaust after-treatment – customers will hardly see anything, but they'll notice the effects of powerful acceleration and, thanks to extremely low fuel consumption, when paying at the gas station." OK, OK – ‘after-treatment’, ‘gas station’… But he’s a professor and a doctor who works for a car maker, so let’s cut him some slack.