Car manufacturers tout their products' fuel efficiency. So we tested two low-consumption models -- the BMW 116d in the Efficient Dynamics Edition and the Volvo V40 D2. Both have almost equally powerful 1.6 liter turbo-diesel direct injection engines. We drove them on the same routes to see whether they bring the promised savings. For more go to http://www.dw.de/program/drive-it/s-9690-9798
