I also have physics for the Turbo.
That's an odd result... I tested them with the AI at a number of different styles of track and the Viper was consistently neck and neck with the Corvette, a second or two behind the class A cars, which were also tightly grouped. And the NSX should get some company in the lower tier with the 993.
Sure, I can run Monza 66. All I have to do is set up an AI field, pick a track, hit CTRL-C to give the AI control of my car, and wander off to do some work for 45 minutes.
Thanks for the reminder. Busy season with work these days, and my AC time has been taken up by trying to sort out the NSX.