What is the difference between engine power and capacity?

Engine displacement and power are two key yet distinct performance specs. Displacement refers to the total volume of all cylinders, measured in liters or cubic centimeters. Generally, bigger displacement means more air-fuel mixture gets burned per cycle, which should translate to more muscle – though tech like direct injection and turbocharging can bend the rules. A small turbocharged engine might punch above its weight class by forcing more air into the combustion chamber. Power, on the other hand, is the engine's ability to do work over time, measured in horsepower or kilowatts. It directly impacts acceleration and top-speed potential. Take two 2.0L engines: a performance-tuned version could deliver 50% more power than a standard one. Here's the catch: bigger engines usually drink more fuel, though tricks like variable valve timing and cylinder deactivation help. High-power setups often need heavier-duty transmissions and cooling systems too. On the road, power dictates how quickly you can pass slower traffic, while displacement affects low-end grunt – that's why big-displacement engines feel more effortless on mountain roads. When choosing a car, balance both based on your needs. City commuters might prioritize fuel efficiency, while frequent highway drivers should pay attention to power delivery in the mid-to-high rev range.