1948 Tucker '48 Sedan aka "Torpedo"
1948 Tucker '48 Sedan aka
A car better known for not being built, the Tucker used a fastback design to cover the motor of this rear-engined car. In its time, it was viewed as the most aerodynamic car ever built. Preston Tucker made only 51 of them before production was halted by an investigation for securities fraud. He was later exonerated, but his company failed.

Last updated July 15 2011: 1:57 PM ET
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All the market research, focus groups, and top engineering can't change one simple fact: Sometimes carmakers blow it.

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