In a recent interview, Bmw's development boss Albert Biermann admitted that there will be a time when diesel engine technology will make it suitable to power a fully fledged M car.
For those who don't know, Bmw's M division is already working to significantly reduce the carbon emissions of its sports cars and to develop performance applications of Bmw's new hybrid technology.
The German manufacturer is trying to introduce battery-assisted but, according to Biermann flywheel-driven "flybrids" looks more promising. Regarding an M version of the Z4, he added that there will not build this because the Z4 is a heavy car and it would be difficult to tune it.
Also, it would be hard to position it on the market place, because using the 4.0-litre V8 would be too close to the M3 Convertible while using the 3.2-litre, six-cylinder motor is not possible because this engine is no longer emissions-compliant.
Anyway, we have good news: the hope is not lost for an affordable M car and the upcoming roadster based on the 1-Series will receive an M version.
"I would love to produce this kind of car. It's very difficult to make the numbers add up, but I know that I'm not the only person who likes the idea." Said Biermann.
"With cars like the X5 and X6 M, the torque characteristics of diesel engines would make them the ideal choice, were it not for their unsporting character," Biermann said.