BMW is testing the future electric M3 around the Nurburgring Nordschleife in Germany. The model will have up to four electric motors and over 1,000 horsepower in its most powerful guise.

The BMW M3 Competition utilises a 2993cc closed-deck ... and produces much bigger numbers than both the B58 and the S55 unit it replaced. Key areas that distinguish the two motors are the headers ...