The all new 2nd generation 2021 BMW 4 Series Convertible, starts at 54,095 (including $995 destination) for the new 430i Convertible and $56,095 for the 430i xDrive Convertible which are powered by a 255 horsepower 2.0-liter 4-cylinder BMW TwinPower turbocharged engine mated to an 8-speed transmission with new Sprint function. The M440i Convertible starts at $64,995 and the M440i xDrive Convertible at $66,995 are powered by a 382 horsepower 3.0-liter inline 6-cylinder BMW TwinPower turbocharged engine also paired with an 8-speed transmission with new Sprint function. The new 2021 4 Series Convertible is 5.2-inches longer (5.3-inches for M440i models), 1.0-inches wider and 0.1-inch higher. It also has a 1.6-inch longer wheelbase than its predecessor while the front track has grown by 1.5-inches. Standard displays are an 8.8-inch center touchscreen control display and a 5.1-inch color display between the instrument gauges. Selecting the optional Live Cockpit Professional upgrades the displays to a 10.25-inch center touchscreen control display and a fully digital 12.3-inch instrument display.