BMW
In the video, Marcus Engelke, Project Manager Drivetrain BMW M4, and Ulrich Schulz, Head of Drivetrain Design at BMW Motorsport make it clear that the straight-six engine was developed from the outset to be used for both track and road use. 510 hp, 650 Newton meters (479 lb-ft) - this is the most powerful straight-six engine we ve ever fitted in a production car, says Engelke, while Schulz adds that at 590 hp and 516 lb-ft, this is the most powerful straight-six engine BMW has installed in a racing car since the days of the BMW M1 Group 5.
The 3.0-liter twin-turbocharged S58 six-cylinder engine used in the M4 is an upgraded version of the engine used in the X3 M and X4 M. The base M4 produces 473 hp and 406 lb-ft of torque which it sends to the rear wheels via a six-speed manual transmission. The M4 Competition manages 503 hp and 479 lb-ft thanks to a boost increase, and channels that power through an eight-speed automatic transmission.