I understand motorcycles better than cars, so Charles would be a better judge of how moving around weight might affect a car.
My understanding is that moving weight would have a pretty significant impact on chassis stability, although race cars are typically set-up to have minimal body roll in cornering. I strongly suspect that for/aft weight balance, and weight centralization are going to be more important for a car than whether weight could be shifted laterally.
I strongly suspect that the grip you lose by unloading the inside tire is gained back by loading the outside tire.
Is this information similar to the book you mentioned?
http://en.wikipedia.org/wiki/Bicycle_and_motorcycle_dynamics
This stuff interested me, so I'll probably pick up that book later.
You get diminishing returns in terms of grip when you put more weight on a tire. So it's better to have 200lbs on each tire than 100lbs on the inside tires and 300lbs on the outside tires.



Sounds like that car is more expensive to maintain and drive than a military jet! But back to the OP, lots of cars and lots of places where a car can be competetive if not faster than bikes. Certainly takes less skill to drive quickly than ride quickly IMO. I think that cycle world or some other bike mag actually did an article with a viper and sport bike on the road (schwantz also raced a viper or vette on a track). The Viper could clearly be driven quicker on an unknown twisty road with less pucker factor. But I still prefer bikes.