0-60 for the current 455HP Camaro is 4.0, with reported 1/4 mile times of 12.00 to 12.60 at about 117 mph depending on options, driver.
When Motortrend tested the 1998 Z28 it went 0-60 in 4.9 seconds, usually the accepted value is 5.1ish. with a 1/4 mile of 13.20 to 13.60 depending on transmission. The 01 to 02 would touch 12.90's I went 12.95 in my 2001. Muscle Mustang and Fast Fords took two separate LS1 Camaros to 12.89 and 12.82 bone stock.
The difference is these new cars are tight, stop well, handle phenomenally and they are quick right of the showroom floor on street tires with all the good modern stuff. There are guys running 11's with just tires on the new cars. I needed heads, cam, rearend and tires in the WS6. The new Muscle cars are light years of stuff built 10 years ago or more.