BMW has started to tease the all-new M3 by releasing a short clip in which they briefly reveal the soundtrack of the car’s engine. The same power unit will find its way under the hood of the M4 Coupe once both cars come out sometime next year. This engine will allegedly be a twin-turbo, inline-six 3.0-liter developing around 450 bhp and 405 lb-ft. It should be enough to grant the cars with a 0-100 km/h time of 4.2 seconds and an electronically-capped top speed of 250 km/h. A concept of the M3 or M4 Coupe is likely to be revealed later this week at the Pebble Beach Concours d’Elegance.