You might have heard about high compression ratios, but what exactly are they, and what kind of effect do they have on an ...

The latest concept is a small four-cylinder running on synthetic fuel that can achieve 71 mpg in an EREV platform.

Rolls-Royce has hiked the durability improvement target for its Trent engine time-on-wing programme, raising the figure from ...

Horse Powertrain, a joint venture between Renault, Geely, and Aramco, has unveiled an innovative hybrid engine that promises to push the boundaries of fuel efficiency.

[Stay on top of transportation news: Get TTNews in your inbox.] Advanced researchers and engine makers say the internal combustion engine’s ability to be more efficient and run on greener fuels means ...

LAS VEGAS--(BUSINESS WIRE)--Achates Power, Inc. (API) showcased at ACT Expo what has been demonstrated as the cleanest and most efficient internal combustion engine (ICE) architecture to date.

NOTICE: The project that is the subject of this report was approved by the Governing Board of the National Research Council, whose members are drawn from the councils of the National Academy of ...

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 ...

A new hybrid engine concept developed by Horse Powertrain, powered by 100 percent renewable ...

Astro Mechanica's engine operates in three distinct modes: Mode 1 uses an electric motor to spin the "blisk" – a bladed disk the company makes in-house that acts as the compressor/turbofan instead of ...

This has been discussed before on Ars, such as at https://arstechnica.com/civis/threa...ost-efficient-heat-pump-in-the-world.1501605/, and https://arstechnica.com ...