Compare images of 2021 Audi A4 and 2018 BMW 3 Series Sedan Diesel by choosing the desired model and trim and then selecting the comparison image.
Two Sedans with more similarities, such as the body structure, market segment, starting price, ground shadow size, height, and maximum occupancy, than differences, like the model year, powertrain, horsepower, and fuel economy. First of all, there is a difference in model years. The is 3 years newer. Also, the 2021 A4 has bigger and thirstier engine; the 2018 3 Series Sedan Diesel gets 8 more mpg. Among similarities are the body structure, market segment, starting price, ground shadow size, height, and maximum occupancy.