Further Reading 2018 BMW X3 review: The ultimate crossover machine? 2019 marks the beginning of the second generation for the BMW X4, which shares a platform with the third-generation BMW X3 . The 2019 model is 3.2 inches (81mm) longer and about 1.5 inches (37mm) wider, with about two-thirds of the extra length added to the wheelbase. With the use of more aluminum combined with high-strength grades of steel, the weight of the X4 has been trimmed by around 110lb (50kg). The xDrive 30i is powered by a 2.0-liter twin-turbo inline four. Capable of 248hp (184kW) and 258lb-ft of torque (350Nm), the X4 can go from zero to 60 in just a hair under six seconds. If you want more power, you can upgrade to the M40 trim, which offers an inline six-cylinder power plant.