No specific details have been released at this time, but you can bet that the automaker's slick 2.0-liter turbo-diesel four will be underhood. In the Golf, Jetta and Passat, the mill kicks out 140 horsepower and 236 pound-feet of torque, and both six-speed manual and DSG transmissions will likely be available. This engine is already good for as high as 43 miles per gallon highway in the Passat (and we've routinely hit as high as 50 mpg in our long-term Jetta TDI), so we expect exceptional fuel economy out of the diesel Bug, as well.
What's more, our understanding is that Volkswagen plans to offer the TDI engine in the upcoming Beetle Convertible, which will make it the very first clean diesel droptop available in the United States. Of course, we won't know for sure until the roofless Bug debuts later this year, but still, it's something to get excited about (if ragtop Beetles are your thing, anyway).
Stay tuned for the full scoop live from the Chicago show next month.