The main one is that they're typically lighter ... and since they don't use fuel as efficiently as a 4-stroke engine, you'll ...

In the case of the 4.6L Jeep stroker engine, the extra stroke gained 0.6-liter over the ... 2000 to 2006 model Jeeps priced ...

The Napier is a complicated extrapolation of a basic opposed-piston engine. Your average “engine” has cylinders and pistons ...