If Lego isn’t challenging enough, how about building a miniature engine? Stirlingkit sells engine models that look, function, and sound like the real thing. Take this mini inline-six inspired by the ...

As smooth as they may be, inline-6 engines are a packaging nightmare. That's why only a select few automakers, like Volvo, ...

The N52 inline-six is a great example of this phenomenon. Introduced in 2004, it was the latest in a long line of six ...