http://www.motortrend.com/auto_news/..._go/index.html
"The near-4300-pound CTS-V thunders from 0 to 60 mph in 4.1 seconds and nails the quarter mile in 12.3 seconds (automatic) or 12.4 seconds (manual). Top speed is limited to 175 mph in the auto (to preserve the tranny), but the manual will storm to an autobahn-melting 193 mph.
As the Z/28 will weigh 200 to 300 pounds less than the CTS-V, it may nail 60 mph in 3.9 seconds and run the quarter in the very low 12s."