The BMW 328i Convertible has a 3.0-liter inline six-cylinder engine making 230 horsepower and 200 lb.-ft. torque at a low 2,750 rpm. The more expensive BMW 335i Convertible receives a direct injection twin turbo 3.0-liter six with 300 horsepower and 300 lb.-ft. torque that peaks between 1,300 and 5,000 rpm. The performance difference is dramatic: the 335i clears 60 mph in about 5.7 seconds. A six-speed manual or six-speed automatic with manual shift paddles delivers power to the rear wheels, while an optional active steering system directs the front tires. Stability and traction control systems are standard, as well as several braking features including one that dries the brake pads for maximum stopping power in the rain.