The large retro-look Challenger is based on the Chrysler 300 and Dodge Charger, and is a modern version of a 1970s muscle car. As such, it is very quick in a straight line and its brawny 5.7-liter V8 emits an invigorating sound. It's also a fairly comfortable and effortless cruiser. Recent tweaks have made the car more responsive in corners and have tightened up the suspension and steering, with a small sacrifice in ride comfort. The V6 has become more powerful and competitive, and the top-level engine is now a whopping, high-horsepower 6.4-liter V8. Reliability has dropped to below average.