A base 2012 Corvette Coupe, for example, would have a lower top speed than a 2012 Corvette Z06. Manufacturers rarely publish top speeds, as those speeds are often limited electronically and usually require optimal conditions to achieve. Instead, they focus on 0-60 mph times and quarter-mile times.
To find a more precise answer, you'd need to specify the exact model and trim level of the 2012 Corvette.