The story behind BMW's unique quad-turbo diesel engine, its impressive performance, and how it stacked up against its rivals in the X5 M50d.

We may receive a commission on purchases made from links. I first fell for turbo-diesels many years ago. A sporty-looking Rover model arrived in the family garage in a dreadful state — the owner had ...

It's been a long time coming, but the wraps are now off Chevy's first diesel-powered passenger car since 1986. The 2014 Chevrolet Clean Turbo Diesel model is being unveiled today at the Chicago Auto ...

From the October 1982 issue of Car and Driver. Truths about the new Audi 5000S Turbo Diesel are a lot like children: they're everywhere you turn, but they're mostly underfoot. Feel free to take this ...

In 2016, BMW unveiled its 3.0-liter inline-six quad-turbo diesel engine. The story behind it isn't quite as important as where BMW got its brand name from, but the B57S (or B57D30S0, as it was ...