You also have to remember that the sensation of speed can be different depending on the platform and drivetrain. So, unless you're measuring the difference, the "feel" can be deceptive.
Those old fox body Mustangs were a classic example of how deceptive differences in delivery of power can be. I had friends with loud, geared cars. They would pull really hard down low and would say, that GN doesn't have a chance, blah, blah... Line up and by the time we were thru second gear, the Buick was out front. Now, being in each car was completely different. The Mustang was pretty violent, while the Buick was a consistent puuuuusssssshhhhhh on your chest.
Also remember that the other car you're use to is about the size of a lunch box. Combine small displacement and a large turbo (lag) and the slingshot effect of a turbo motor is magnified.
Regardless, get some real tires, make sure the car can hook and is running in top shape. Then go find that SRT4 and find out where you are.
Regards,
John