The famed automotive pot-stirrers at Autocar are at it again. According to two blurbs from the UK publication, BMW's new 5 Series Gran Turismo may spawn at least one less costly, less powerful variant, but a high-performance M version is apparently off the table.

On the fuel and financial economy front, Bimmer is reportedly considering adding four-cylinder powerplants to the controversial new five-door, including the 175 bhp diesel from the 320d. A twin-turbo diesel may also be in the cards. The fear here is that the premium-priced 5GT may in fact be priced too aggressively, as it stickers above a comparable 5 Series Touring model. In any case, we don't expect to see the less-powerful diesel Stateside, although we wouldn't be terribly suprised if the company chose to shoehorn in something like the twin-turbo 3.0-liter diesel already on offer in the 335d.

On the M side of the equation, Autocar says that the gasoline V8-powered 550i will remain the pinnacle of the range, as BMW has "ruled out" a M-Technik variant. Given that BMW has recently seen fit to move M beyond traditional cars (see: X5 and X6) and that these higher performance models often have thicker margins attached, this strikes us as somewhat curious decision – especially as the 5GT figures to be the most dynamically promising of the bunch. This source also doesn't jibe with what we heard from BMW officials just last month when we drove the car in Portugal. At that time, the official line was that no decision had been made, but knowing glances and meek smiles seemed to indicate that things looked good for the model.