The Stirling may make an excellent engine for (particularly series hybrid) hybrid cars and has recently generated some interest in this role.

The vehicle will be a series plug-in hybrid.

It is used mostly on series hybrids (see below).

One hybrid type that can quickly be put into production is the series hybrid, a battery-powered vehicle with a small engine-generator on board.

Some of the best results for hybrid buses have been for series hybrids running in extremely congested cities.

They are called "parallel hybrids," and the New Bus is a "series hybrid."

In a series hybrid, the engine generates electricity that runs the wheels.

They only ran the parallel-hybrid; the series hybrid was not finished due to the complex high-voltage electrical connections.

Also some series hybrids exist, see in hybrid vehicle.

This configuration makes series hybrids more efficient in city driving.