Any of the rear wheel drive cars can bite, but most only give you a nip and then only reluctantly after you've stood on their tails and pulled their ears. But that would be 'most'.
The TVRs are different. They look fierce, have a tremendous bark and that's just a prelude to their vicious bite, wolf's clothing with a tiger inside and an angry stripy kitty at that. If the other RWDs only retaliate under pressure the TVRs take no provocation to deliver punishment for no apparent reason -- it's like they are fuelled with PMT rather than petrol. Still, at least the TVRs are predictable, in the same way you just know a pitbull terrier will rip you a new rectum if you don't treat it just right.
The F40 is an interesting animal too. The driver initially accelerates up to terryifing speeds which is all well and good for a supercar, but astute pilots will note that Ferrari's finest of the '80s is in fact only in reaching the top end of second gear when most supercars are well into third. This should be a clue that the F40 differs a little from the average mega-vehicle and that will become sort of apparent the brake pedal is depressed, and blindingly obvious when the steering wheel is turned. Both operations will affect the direction of the F40 about as much as a gentle nudge of the stirrups to a stallion enraged by a branding iron applied to its backside. In short, the ability of the F40 to turn and corner is simply nowhere near its ability to accelerate and that combined with something called lift-off oversteer (or, blind panic) makes it a challenging drive even if you only need change gear twice a lap.
Still, the F40 is not the most challenging car. If the TVRs take no provocation for turning around and applying their fangs to whichever part of your body happens to be in range, then at least you needed to be within range. There is one car that will not just bite without provocation but will go out of its way to look up your address, come round, suggest you've been looking at it sideways across the pub parking lot before removing your teeth with a camshaft. It is even quicker than the F40 in a straight line, but it turns in much more quickly because it cannot wait to deliver you to the hell you so richly deserve for even daring to slip into its cockpit. I would call it lift-off oversteer but that implies some sort of resemblance to normal handling characteristics -- I believe a better term is "instant death". Most other cars only handle the same way when a wheel falls off as you enter a corner, or if they have some mechanism to shift the engine momentarily about two metres behind the rear wheel to really get the thing rotating around its axis. It is a car with a suicide mission on every turn and it wants your company in purgatory. It is the most challenging vehicle in GT5P, the fastest way to your first crash and it is the Ford GTLM.