BMW launched its 1-Series Convertible for Europe and North America in 2008. Like the Coupe, the Convertible model is offered in 128i or 135i variants. The 128i Convertible is powered by BMW's 3.0-liter, 230 horsepower inline six-cylinder engine generating 200 pound-feet of torque. Like its fixed-roof stablemate, the 128i Convertible features Valvetronic valvetrain management and ...


