A production car is different than a production race car. The Viper has no power, a/c, like you stated. It also doesn’t use street tires and is only street legal if you remove the front splitter, which makes a huge difference. It may be available for purchase and be street legal, but how can you compare it to an LFA, GTR, ZR1, etc that have all the street car amenities? Remove the a/c, power, nav etc and throw R-Compound tires on an LFA, GTR, or ZR1 and see how the ACR fares against them.
Also, you can’t compare the ACR to the Cobra Jet because the Cobra Jet will never be able to drive on the road legally. It has no vin number.