Depending on how you measure it, the displacement of a Mazda 13B is either 1.3 liters (1,309 cc), 2.6 liters (2,618 cc), or 3 ...

Hirth and ePropelled develop hybrid propulsion systems for UAVs and drone technology with extended flight duration.

Hirth Engines and ePropelled today announced a strategic collaboration aimed at delivering the next generation of hybrid ...

Unifying Strengths to Address a Growing Market COVENTRY, UK / ACCESS Newswire / January 13, 2026 / Hirth Engines, a globally recognized leader in two-stroke engine technology, and ePropelled, an innov ...

Yamaha's legacy of winning motorcycles has earned it a reputation for performance. Here are some of the top speed demons ever ...

The story of how Honda developed an oval-piston race engine that ultimately failed but still made history along the way. Honda pioneered oval piston technology in the 1970s for four-stroke racing ...

Gearheads and faithful Jalopnik readers already know the basics of an engine's bore and stroke, but for those that might be new here, let's dip our toes in the shallow end. An engine's bore refers to ...

It looks like GM is working on modernising two-stroke engines by tackling their emissions problem. This could open a whole new chapter for internal combustion. It’s been a while since two-stroke ...

GM has filed a patent application for a two-stroke engine valve system. The patent application is tagged with patent number US 2025/0354528 A1 and was filed with the United States Patent and Trademark ...