At Circle Track, we're all about helping you do more for yourself. But sometimes that's just not realistic. That's not casting doubts on the intelligence of our readership. Just like your mom, we ...

Meet the Birotary, a crazy new and complicated engine that has three cylinders arranged like a star, a rotating block, a ...

They say Rome wasn't built in a day. The same should be said for any well-built Porsche 911 motor. They both took some time to be designed. So, hot-rodding my own 911 engine proved to be a maddeningly ...

In the era of downsizing, automakers are gradually moving away from high-cylinder engines. As a result, they are increasingly in favor of smaller, often turbocharged or hybridized powertrains. A few ...

Toyota's new AE86 engine parts have been machined to greater precision with better materials than their original '80s counterparts. In this case, AE86 owners who need new cylinder head and block ...

Far from the car industry's heart in Detroit, Silicon Valley startup Tula Technology is gearing up for the first product launch of its 10-year history. In all that time, Tula has been working on one ...

Ford Motor Company's 4-cylinder engines have always been popular with the hot rodding set. Even in the days of the flathead, a beefed-up flattie four Ford was a force to be reckoned with. And as the ...

Once the Audi TT RS leaves production after this model year, just two cars will come equipped with five-cylinder engines, the Audi RS3 and (not-sold-in-America) RS Q3. Figure those two will be around ...

Explore the iconic five-cylinder engine, from Audi Quattro to RS3, known for its unique sound, power, and racing heritage.