Based on an Opel platform, the Buick Cascada is a four-passenger convertible with a fabric roof and a roomy trunk that went on sale for the 2016 model year as Buick expanded its lineup. However, the Cascada lasted only four years and exited the U.S. market after the 2019 model year. The Cascada offers a turbocharged 1.6-liter four-cylinder engine making 200 horsepower and a six-speed automatic transmission. The convertible top can drop down in as little as 17 seconds.