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Alpina XD3
Alpina is known for upgrading BMW cars and, now, SUVs. The XD3 biturbo is an enhanced version of BMW's diesel-powered X3 crossover SUV, a version that's not yet sold in the United States. For the most part, Alpina worked on the intake and air cooling systems to maximize the engine performance. The transmission was also upgraded to deal with the higher torque output.
- Last updated March 20 2013 06:13 AM ET
