The Mazda 6 is a very comfortable car to travel in – thanks a quiet cabin and suspension that does a good job of absorbing lumps and bumps. It's also fun to drive, well equipped, and economical, too. The most frugal model is the 2.2-litre diesel, which returns economy of 68.9mpg and emissions of 108g/km, while also managing 0-60mph in just nine seconds. The Mazda gets a five-star Euro NCAP rating and the firm finished an impressive sixth in our Driver Power 2013 survey.