Bore and stroke are important measurements when it comes to calculating an engines displacement, and the kind of performance an engine offers.

Internal combustion engines aren’t very efficient. Most modern gasoline engines only convert about 35% of fuel energy into work. Diesels can do over 40%, but need expensive emission systems to stay ...

Gearheads and faithful Jalopnik readers already know the basics of an engine's bore and stroke, but for those that might be new here, let's dip our toes in the shallow end. An engine's bore refers to ...

You may have heard your car has a four-stroke engine, but you're not sure what that means. Why are there four? And what is a stroke, anyway? A modern gas engine most commonly uses pistons and a ...