Venus Aerospace has made the most efficient rocket engines ever flown. They will go from runway to mach 9 hypersonic speed. The Venus Aerospace Stargazer M4 is designed to reach a top speed of Mach 9, ...

Finnish manufacturer Wärtsilä introduced an engine back in 2015 that was so good, it snagged a Guinness World Records title for being the most efficient four-stroke diesel engine shortly after its ...

Geely unveils a hybrid engine with 48.4% thermal efficiency and 105 mpg, setting a new benchmark for production powertrain ...

The five most fuel-efficient widebody aircraft in commercial service for 2026 have been identified, reflecting advances in lightweight materials, aerodynamics, and high-bypass turbofan engines. Models ...

The metric is highly dependent on factors such as seating density, route length, and payload.

Most V8 fans accept the fact that choosing a vehicle with such an engine means higher gas bills and overall running costs. As addictive as a V8 roar is, boosted and/or hybridized six-cylinder ...

From 1945 to 1955, a British aeronautical company called Napier & Son produced not just one but two versions of an intricate hybrid piston engine, which they named the Napier Nomad. The post-World War ...

There’s no doubt that EVs and hybrids can deliver better fuel economy than traditional gas-powered vehicles. But that efficiency comes at a cost. Namely, a base price that is often thousands of ...

Every car here has a classic V8 soundtrack but can be fairly efficient with a light foot. Most V8 fans accept the fact that choosing a vehicle with such an engine means higher gas bills and overall ...