The GTO is most powerful, but it can't match the handling of the Concept LM or Cerbera LM.
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3a. What's the best car in the game?
This may sound wishy-washy, but I don't think there is a 'best car'. Some cars are all around better than others, but at the top levels, each car has it's own unique advantages and disadvantages. Also, people define 'best' in different ways. Some think that top speed makes a car best. However, a high top speed won't do much for you on courses like Autumn Ring Mini. Others think handling is most important, but even if your car handles like it's on rails, you still need acceleration and speed. A good mixture of all abilities is what makes a car best, but once you analyze that mixture, no one car stands out on top overall. Also, different driving styles favor different cars, so what I might find a great handling car, you might not be able to use at all. Here are some of my picks for some of the better cars, in no particular order.
-Dodge Concept Car (prize model): Generally seen as the most powerful car in the game, it's extremely quick and extremely sticky. Light and powerful, this car will power you to a first place finish in any race it can enter, no problem.
-Dodge Viper: Either model, this is one of the cars that can pull out an impressive Triple Crown of the three hardest series in the game: Normal, Tuned, and World Cup. The best car in normal, hands down, and it handles excellently once you master it.
-Subaru Impreza/Impreza Rally Edition: Great handling, however this car suffers from a lack of top speed. With a few minor gear changes, that can be fixed to make this car extremely competitive. Another car that can run a Triple Crown.
-TVR Cerbera/Cerbera LM Edition: Another Triple Crown winner, this car is good all around. Excellent handling, great top speed, great acceleration, this car really has it all. In it's LM edition, a top-class car.
-Mitsubishi GTO TwinTurbo/GTO MR: nearly the same car, however the MR doesn't always show up in the used car lot. The MR is a bit lighter but harder to handle. One of the fastest cars in the game, the GTO has serious handling problems that can't be completely overcome through tuning. Its impressive power still gives it an honorable mention
-Mitsubishi FTO LM edition: An extremely light, fast, agile car. 4WD gives it great handling, and its light weight makes it an excellent contender for the 300km enduro and All Night I. An all around great car that can be easily tuned for speed or acceleration, and fits with many different driving styles.
-Honda Del Sol LM edition: Another very light, very fast car. This car is so well-balanced, that it might have perfect handling. Once you get the feel of this pocket rocket down, nothing will be able to stop you.
I could keep going on with a few more cars, but I'll stop there. All of these cars are pretty evenly matched, and as you can see by their descriptions, they are all very different and excel in different areas. Again, I don't really think there is a best car in the game, though there might be best cars for the differing series...
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