Checking out a new car's competition from the used-car market.
This week ... well, we've got a doozy on our hands. It's the all-new BMW M4, a very powerful and very capable sports coupe. Power (all 425 ponies of it) comes from a 3.0-liter, turbocharged inline-six, capable of sending the coupe to 60 in under four seconds. It's filled with technological gadgetry - every single adjustable component has no fewer than three different modes, including steering weight and damping strength. Every second it's running, the car begs to be driven at the ragged edge.