What You Learn Driving The BMW M3 And M4 At A Great Race Track

The 2015 BMW M3 and M4 have a new, turbocharged inline six that's more powerful and torquey than the high-revving V8 of the previous M3. But that's not the whole story. They're also lighter, tighter and just as much fun. Here are a few things I learned from driving the two Mers at a spectacular American race course. » 6/13/14 1:09pm 6/13/14 1:09pm