Automobile engines have undergone tons of changes over the years, primarily to make them more efficient. For the most part though, engine changes result from a string of iterative improvements on ...

Carburetors are old news. We've moved on to electronic fuel injection long ago. But of the two main varieties of fuel injection, port and direct, there hasn't been a clear winner as of late. Both ...

Port fuel injection (PFI) was a major milestone in the early '80s. The integration of PFI rapidly changed the way fuel was delivered by increasing fuel economy and improving engine performance. Even ...