Ready or not, here comes diesel (again). Taking advantage of the cleaner diesel fuel now available in the U.S., BMW
has unwrapped diesel-powered versions of both the X5 and 3 Series. The X5 xDrive35d and 335d will each feature the same twin-turbo, 3.0-liter, inline-six engine producing 265 horsepower and an impressive 425 pound-feet of torque at a low 1,750 rpm. Fuel economy is estimated at 23 city and 33 highway miles per gallon for the 335d, 19 city and 25 highway for the xDrive35d - figures that represent improvements of roughly 20 to 30 percent over the vehicles' gasoline counterparts.