How Engine Capacity affects its performance:
The engine's capacity plays an important role in determining various engine outputs such as engine power, torque, and mileage. It is the volume, or in other words, the space available inside the cylinder to accommodate air-fuel mixture for burning. Consider that it is just like a drum filled with water. Bigger the drum, more the water it can accumulate and guzzle.
Similarly, an engine with higher capacity sucks more air into the cylinder. As the volume of the air grows, the fuel system also proportionately increases the corresponding quantity of fuel to the engine. As the amount of the fuel for burning increases, it also increases the power output. Hence, in simple words, the power output of an engine is directly proportional to its capacity in a conventional engine design. Incidentally, Chevrolet 9.3L V8 crate engine is one of the largest capacity engines in the world.
Supplying more fuel to the engine increases its power and also its fuel consumption. As the volume of the cylinders increases, the power output also increases. But eventually, this reduces the mileage. Hence, in that context, the mileage of the car is inversely proportional to the engine capacity in a conventional design. The manufacturers keep upgrading the petrol engines and strike a balance between power and mileage to achieve both performance and efficiency.
Typically, the cars with petrol engines of best fuel mileage come in the zone of up to 1000cc. Those with capacities 1000cc to 1500cc have better mileage figures. Whereas, engines with displacement from 1500cc to 1800cc have moderate fuel average range. Those with capacities from 1800cc to 2500cc have lower fuel average range and the engines above 2500cc have the least mileage among all as shown in the chart below.
Almost identical set of rules apply to the smaller carburetor engines for bikes. Typically, the bike engines with best fuel average come in the range of up to 110cc. Engines from 110cc to 150cc have better mileage figures. Engines with capacities from 150cc to 200cc have moderate fuel average range. The engines with capacity from 200cc to 500cc have lower mileage. Engines above 500cc have the least mileage among all, as shown in the chart below.
Hence, the engine cc displacement is a crucial factor while buying an automobile. You should decide the displacement thoughtfully by analyzing the intended purpose or the end usage of the vehicle. So that, it doesn’t disappoint you with the performance of the vehicle which you select.