A surprising drag race between two very different machines: a 600HP Opel Calibra 4x4 Turbo and a 610HP Audi R8 V10 Plus Spyder. The turbocharged Calibra, a rare AWD sleeper, takes on the naturally ...

Lifted trucks and 4x4 machines go head-to-head to see what really wins in a straight-line battle—horsepower or grip. Expect ...