On top of the diesel experiments, two C 111's were selected to test a V8 engine. Merc engineers removed their rotary engines and installed a 3.5-liter V8 in each, and instead of the four-speed ...

the automaker's brand-new clean diesel four-cylinder engine. It may not be quite as radical as some of the company's past rotary racers, but the new Mazda6 Skyactiv-D racecar does have a notable ...

Every few months, it seems a rumor crops up about plans from Mazda to revive the rotary engine. Last November ... lineup will consist of gas and diesel versions of Mazda's 1.5-liter Skyactiv ...