Next BMW M5 to Pack Twin Turbos for 600 HP

BMW’s looking to take on the newest Audi RS6 by producing a boosted version of the M5’s V10 motor, which sources say should make more than 600 HP. The new engine is said to be a development of the twin-turbo 4.4L V8 from the X6M, which makes 564 HP already. With two extra cylinders and the M division’s careful caressing, the newest M5 should be more than a match for the RS6’s bi-turbo V10, which makes 580 HP currently.