Your car only starts reliably because two electrical workhorses share the load. The battery delivers instant power on demand, ...

Some drivers have to jump start their cars regularly when temperatures drop. Here's why car batteries are so sensitive to low ...

You can measure horsepower at home by timing RPM climbs, calculating wheel speed from tire size and gear ratios, and comparing the results to SAE net specs.

Here's how car speedometers calculate how fast your vehicle is going. And here's why they may not always be accurate.

The colored markings under your car's hood are indicators that the car was assembled correctly, giving mechanics a clue as to ...

Your alternator quietly does more than keep the battery topped up. It turns the engine’s rotation into a steady flow of ...