It's easy to build a sports car: You make it lightweight and powerful with the engine, transmission, and occupants positioned towards the center of the car for better balance. Tune the suspension to serve up gluttonous portions of grip and balance and presto: You're done!
Performance sedans are another matter entirely, however. The engineers have to take a car
that was packaged for comfort, convenience, and practicality and turn it into something
special - something that makes the driver giggle on the right road at the right time, but that handles the daily grind as well as its mundane siblings. Currently, the BMW M5 sets the benchmark, although it's anything but perfect. The transmission, the looks and the universally loathed iDrive system all detract from the M5 experience, not to mention the fact it'll cost you close to $90,000 to put one in your driveway...
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