There are all manner of rumors concerning the next-generation Mazda MX-5 Miata, with reports claiming the car will feature a compact turbocharged engine, tip the scales at less than 2,200 pounds and perhaps even offer a dual-clutch transmission.

What we do know is that the car will be based on a rear-wheel-drive platform developed by Mazda, and that it will be built at a plant in Hiroshima, Japan.

We also know that the same platform will be used for a new Alfa Romeo model, which may end up reviving the “Duetto” or “Spider” names.

Now Autocar is reporting that Mazda is considering offering a diesel option on its next-generation MX-5.

Potential hurdles for the diesel, according to the report, include low demand, a lack of revs and too much weight (diesel engines typically weigh more than their gasoline counterparts).

Though it’s unlikely a diesel-powered MX-5 will in fact see production, such a car almost certainly won’t be offered in the U.S.

Mazda will, however, launch a diesel-powered version of its Mazda6 sedan later this year.

The next-generation Mazda MX-5 is due out in 2014 and will be joined by its Alfa Romeo sibling in the following year.