For locomotives powered by both external electricity and diesel fuel, see electro-diesel below.

For locomotives powered by a combination of diesel or fuel cells and batteries or ultracapacitors, see hybrid locomotive.

The Jets have since looked like runaway locomotives, powered by an offensive renaissance that is equal parts running with power and spreading the ball to receivers.

As with the Merchant Navy class, electric lighting was provided on both locomotive and footplate, powered by a steam-powered generator below the footplate.

The C620 would have been a 2,000-horsepower, six-axle locomotive, powered by the same engine as the C420.

The C428 would have been a 2,750-horsepower, four-axle locomotive, powered by the same engine as the C628.

Other designs, such as locomotives powered by gas turbines, have been experimented with, but have seen little use, mainly due to high fuel costs.

In 1944 the letter g was introduced for locomotives powered by generator gas (Generatorgas).

This allowed the "locomotive" - often a cableway powered by a steam engine at the surface - to operate both safely and, more importantly, at higher speed.

The term is generally used when discussing about any locomotive powered by an internal combustion engine.