There's always some extra convertible poundage.
Only in very rare cases, such as the Pagani Huayra Roadster, does a sports car or supercar not gain some weight going from coupe to convertible. Engineers are forced to add structural rigidity throughout the vehicle in order to compensate for not having a roof. The upcoming 2020 C8 Corvette convertible appears to be no exception. Question is, how much heavier will the C8 convertible be over the coupe? Considering the convertible hasn't been officially unveiled, Chevrolet has yet to release any figures.
Fortunately, a recent discussion thread from Corvette Forum may have brought this information to light. According to this unofficial figure, the convertible C8 Corvette has a curb weight of 3,637 pounds – exactly 102 pounds heavier than the coupe's listed weight.
Bear in mind the optional Z51 Performance Package will add some extra weight, for a total of 3,577 pounds, as this supposedly leaked document also shows. Do the simple math and a C8 convertible with the Z51 pack will tip the scales at 3,679 pounds. When you think about it, an extra 102 pounds or so really isn't all that bad in this case. Remember, Chevrolet is ditching the C7's soft top in favor of a folding hardtop setup. This is definitely the heavier option to go with, but doing so also helps move the Corvette further upmarket, which was one of Chevy's initial goals.
We already caught a glimpse of the production-spec C8 convertible from a previously released Chevy video earlier this summer, but a precise reveal date and location also has not been announced. If we had to make a guess, the reveal will take place this November at the 2019 LA Auto Show. And yes, there's a strong likelihood the convertible will have a higher base price than the coupe's $59,995 MSRP.