I’m thinking about buying a diesel Audi TT, because I want a coupé but need to do lots of motorway miles. Could you suggest any alternatives? Robert Macaulay, via email
The Volkswagen Scirocco (above) also comes with a diesel and it’s cheaper to buy than the TT. You could also have a look at the Honda CR-Z, although the hybrid petrolelectric powertrain could actually prove to be less efficient on your long motorway journeys.