The new line of BMW M Performance automobiles will fill a market void. Its products will slate in between the base BMW model and M model. The lineup will also address niches that M has not explored before; such as diesel.
The M135i 3 door hatch based on the soon to be released F21 chassis will be the first M Performance gas powered model. To relate to US models think of the M Performance Automobiles as M developed “IS” cars. The M135i will see suspension upgrades in addition to more ponies under the hood- 320 of them as sources have said. The exhaust note on these cars also is tuned and based upon the M Performance line of accessories.
Source: http://www.bimmerfile.com/2012/04/11/sp ... bmw-m135i/