The 1 Series Convertible has everything that is wonderful about the coupe, except in place of a fixed metal roof, there’s a folding cloth top. The 128i version will arrive first, sometime in the spring, with the 135i showing up later in the year. Drivetrains on both models are identical to the hardtop versions. The 128i comes with the 2.8 liter inline six, which puts out 230 horsepower and 200 lb.-ft. of torque, while the 135i is powered by a twin-turbo, 3.5 liter inline six, which pumps out 300 horsepower and 300 lb.-ft. of torque. Stability and traction control are standard and can be completely turned off.