Never have figured out how to upload pictures. I have some if someone will tell me. In the meantime, here's the comparison.
1. You are correct. There is NO comparison in performance. The Testarossa has a fairly delicate transmission, and cannot stand up to fast launches as the Tremec or the Quaiffe transmissions can. So the odds are, no Testarossa is going to be drag racing Vipers for pink slips, although it is harder to retain traction from the line in the Viper than it is in the Testarossa from the little bit I've pushed the TR.
Also consider that the 88 I purchased has 390 hp 364 torque, vs my SRT 530 and 550 (rough after valve recall work). The Viper and TR weigh around the same (3400 or so) but the Viper has more explosive power available.
Later model TRs go up to 421 hp, and have better brakes, but neither can outbrake an SRT. MY TR brakes equate fairly well, if not a bit better than my 96 RT/10, but not nearly as well as my 03 SRT did.
I've only been up to around 115 mph in the TR, but I do feel that the stability at that speed is better in the TR than in the Viper. Very wide car, very low, very well centered. Even with the 225 x 16 tires, there is no body roll, and no tipping anywhere that I've been able to push it to.
The Viper feels as though your next mistake could be your last. The TR feels as though you can't make a fatal mistake. However, in reality, the rear end can come around on the TR, and I understand that it can be even harder to bring that back than the old Porsche 911s (and I did have that experience in my 81 911 about 20 years ago, so I won't push it in the TR)
So if there is a performance war, I'd say that the only place a TR could win is above 120 miles per hour or so. Otherwise, if one is buying for performance, then the SRT 10 beats the Ferrari in every category.
HOWEVER, the story is not over.
With the radiators and motor behind the driver's compartment, there is no heat coming into the car from side pipes, or roasting your butt from the four cats (before I changed that stuff out on the Viper). Very calm cabin.
The interior is pure leather everywhere, with perhaps the most soulful open gate gear shifting in the history of the world. One drive and if you get it right, you think you should receive an award. There is a feel to the heavy clutch, and mechanical open gated shifter that makes you feel like a race car driver in the TR, that despite its obvious retro nod, isn't present in the Viper.
Interior and shifting go to the TR over the Viper. Harder to do right on the shifting, but much more rewarding when done.
The other major issue is the "work of art" issue. The SOUND of a Ferrari 12 cylinder engine at about 6200 rpm is AMAZING. It is a far, far better sound than any 10 cylinder, including the Viper. And that's before fooling around with any aftermarket exhausts, as I did with each of my Vipers.
The engine is a work of art. Beautiful to look at, even more so than the Viper engine, which is also beautiful to look at in the way that no other modern cars, with plastic shrouds, can duplicate.
Advantage Viper on performance.
Advantage TR on work of art and "feel"
Here's the part that may make a difference to some of you.
The next day after I bought the TR, the ECU (electronic control unit) wasn't working right. The dealer replaced it, but if I had to pay for it at retail, they tell me it would cost between $1,200 and $2,500 depending on who I bought it from.
I also elected to have the 30K major engine tune up done. It had last had cam belts replaced in 1999, and Ferrari doesn't think you should go more than about 5-7 years before replacing them. The car had 17,700 miles on it. It had a $6,000 15,000 mile service in 2002, but that didn't include the cam belts. Why? Because the engine has to come out of the car. Or more appropriately, the back half of the car has to come off the car!
Almost 3 weeks to have the major tune up done. While it was out, they suggested that we rebuild the water pump, not that it needed it, but if it ever does, the engine has to come out. So we rebuilt a perfectly good water pump, just in case.
Cost? I worked a deal because I had already overpaid for the TR, so it 'ONLY' cost me an additonal $6,000. The dealer picked up the balance, which at retail could have been anywhere from another $2,000 to another $6,000 depending on where you have the work done!!
The way I worked the deal, I'm not quite sure what the value of either of the cars actually was, but I think my trade in value on the Viper most closely approximated $54,000, maybe $53,000. I did my numbers net, including tax, license, and certain work, so that isn't exact. I had to negotiate fairly hard for that as a trade in, and I think that I could have gotten $3,000 more perhaps on the private market, given enough time.
However a super clean, local TR doesn't come around often, and this one was a two local owner car that had always been sold (each time) by the same Ferrari dealer, and the car is, according to the mechanic who worked on it after I bought it, probably the best example of its kind he's seen. Plus with the Macintosh amp, Alpine radio and CD Changers, ADS speakers already in, on a red over cream model.
And lastly, for me, it is an opportunity to own a true "Supercar" and "Marque" that I've never owned, and always wanted. It will either be a very short lived experience, or it just might be a few years (which would be quite a while in one car for me).
So that's the rundown from my point of view. I can upload pictures if someone wants to take me through how to do it.