engine displacement
Technical term for the total volume swept by all pistons in an internal combustion engine. Commonly used in vehicle specifications.
この車の排気量は2000ccです。
This car has a 2000cc engine displacement.
排気量が大きいほど、一般的にパワーがあります。
Generally, the larger the engine displacement, the more power it has.
排出量 measures the amount of any substance (e.g. CO₂) released into the environment, while 排気量 specifically refers to an engine's displacement or exhaust volume.
large engine displacement
Compound of 排気 (exhaust) and 量 (amount, volume), referring to the volume of exhaust gas displaced by the engine.