The Cascada has the same floor assembly as the Astra, but everything else is either borrowed from the Insignia or designed specifically for the Cascada. Opel regards the Cascada as a premium class car. For example, it is exactly as long as the Mercedes E-class convertible: 4.7 meters. The Cascada convertible comes in three gasoline and two diesel versions. We tested it with the 1.6-liter gasoline engine, which packs 147 kilowatts and accelerates from zero to 100 kilometers an hour in 9.2 seconds.