Ford has the Mustang, Porsche the 911, and BMW the M3 and M5 ... The previous-generation G30 series M550i xDrive is not a true M Car, but its 523-hp 4.4-liter twin-turbo V8 and all-wheel-drive ...

Its four-door sibling ... The source article notes that BMW is currently penning the design for an electric 4 Series, whose M variant will be launched toward the end of the decade.

The BMW 4 Series Gran Coupé is practical ... one step further by adding explosive performance to that practicality. M Sport comes with plenty of standard equipment, including 18in alloy wheels ...

while the M4 is based on the two-door 4 series coupe/convertible. There is a four-door M4 Grand Coupe. The BMW M4 has a 3.0-litre twin-turbocharged in-line straight six, which is good for 405kW/650Nm.