BMW's inline-six engines are loved among fans and have been around since the company's start, but only a select few can take the mantle as the most powerful.
The BMW 4 Series Coupe is currently available with just two petrol engines: the 420i and M440i. The 420i has a 2.0-litre, four-cylinder turbocharged motor producing 184hp and 300Nm of torque. It’s ...