2013 Chevrolet Corvette Grand Sport release date . The only 2013 Chevrolet Corvette model officially announced to date is that the Corvette 427 Convertible Collector Edition, a limited-production model that pairs the 7.0-liter (427 cubic inch) LS7 V-8 engine with the quality Corvette Convertible chassis. The 505-horsepower 427 Convertible could be a celebration of the ...