Modern engines deliver more power from less metal, sip less fuel, and meet emissions rules that would have seemed impossible a generation ago. Yet owners are discovering that this new efficiency often ...

Automakers are quietly rewriting the rules of power under the hood, shrinking engines even as vehicles, especially SUVs, keep growing in size and weight. The promise is seductive: the punch of a big ...

SUVs are getting larger while their V8 and V6 engines have been replaced by smaller motors. Smaller turbocharged engines benefit from improved fuel economy and better mid-range torque. But ...