The 2018 BMW 4 Series, part of the first generation that debuted in 2014, is a luxury sport compact offering in coupe, convertible, and Grand Coupe (four-door liftback) formats. It is available on three trims: 430i, 440i, and M4, each with different powertrains. The 430i boasts a 2.0L turbo-4 engine that produces 248 horsepower, while the 440i's 3.0L turbo-6 delivers 320 horsepower. The high-performance M4 model comes with a 425-horsepower turbo-6. All engines pair with an 8-speed automatic transmission, but a 6-speed manual is an option for the two-door 430i, all 440i models, and the M4. Rear-wheel drive is standard, with xDrive all-wheel drive optional except for the M4. Key safety features include forward collision warning, automatic emergency braking, and parking sensors. Infotainment highlights include a 6.5-inch display, navigation, and Apple CarPlay.