Only one of these awesome '90s sleeper sedans was ever produced, and you won't believe what's lurking under the hood.

Discover the hidden gems of the tuner car world. These 10 overlooked vehicles have serious untapped potential waiting to be ...

For a premium-brand sleeper, look up Audi, which builds an S performance version of nearly every model in its lineup. The Audi S4 is the tuned version of the A4 sedan that most people buy. The two ...

Purpose-built Sleeper Cars - Find the best car deals! The classic example of an attainable sleeper car is the Volkswagen Golf GTI. It's a simple formula that Volkswagen has perfected over the years.