While it's always a good idea to take these things with a healthy dose of salt, Autoblog.nl is claiming the picture is a screenshot taken from a German brochure. It shows the model will have a four-tailpipe exhaust system and a modified rear bumper with an integrated diffuser. We can also see aerodynamic side skirts and stylish alloy wheels.
Regardless of its authenticity, the M4 will be powered by a new 3.0-liter TwinPower Turbo six-cylinder engine that develops approximately 430 HP (316 kW) and more than 500 Nm (369 lb-ft) of torque. This, combined with a number of weight saving measures, should enable the car to be faster and more fuel efficient than its predecessor.
Source: Autoblog.nl
