If a car is the body, then the engine is clearly its "heart." All the power to drive the wheels comes from here. But what often confuses people is: why do car engine capacities vary?

Yes, the answer lies in the combustion chamber, where gasoline and air meet and burn in a controlled manner every time the piston moves up and down.

In the automotive world, engine capacity is usually known as cubic centimeters or CC. The larger the CC, the more power it can produce. But what are the consequences? Fuel consumption also tends to be higher. That's why it's very important to choose a car with an engine capacity that suits your needs. Don't end up with an "oversized engine" just to take your kids to school.

How to Calculate Car Engine Capacity

Technically, engine capacity is the total volume of the combustion chamber that works with the piston in one cycle. It can be measured in cc, liters (l), or cubic inches (CID).

Simply put: the larger the combustion chamber volume → the more air-fuel mixture can be inhaled → greater power → but more fuel consumption.

There are two common ways to calculate engine capacity:

1. Cylinder Volume Formula

Consider the combustion chamber as a simple cylinder.

For example:

Radius (r): 6 cm

Height/Stroke (t): 8 cm

Formula:

π × r² × t = 22/7 × (6×6) × 8 = 904.32 cc

2. Combustion Chamber Formula

Still using the cylinder concept, but using the bore diameter (D) and stroke (L).

Example:

Diameter (D): 12 cm → radius 6 cm

Stroke (L): 8 cm

Formula:

22/7 ÷ 4 × (12 × 12) × 8 = 904.32 cc

Calculate Based on Actual Bore & Stroke

This is a more technical and realistic method because it directly refers to the piston's work.

Example engine data:

Bore (D): 86 mm or 8.6 cm

Stroke (L): 86 mm or 8.6 cm

Calculation:

3.14/4 × (8.6 × 8.6) × 8.6 = 499.31 cc

That's just one cylinder, bro. If it's a 4-cylinder engine, just multiply the total:

499.31 × 4 = 1,997.22 cc. Yep, that's what we commonly know as a 2,000 cc engine.

Now Calculating Engine Capacity is Easier

By understanding the concepts of combustion chamber, bore, stroke, and cylinder volume, you can now measure your car's engine capacity yourself, or at least not be clueless when asked about engine CC. So, does your car suit your needs?

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Panduan Lengkap Menghitung Kapasitas Mesin Mobil

Kalau mobil itu tubuh, maka mesin jelas jadi “jantungnya”. Semua tenaga buat ngedorong roda muncul dari sini. Tapi yang sering bikin orang bingung adalah: kok kapasitas mesin mobil bisa beda-beda ya?

Yup, jawabannya ada di ruang bakar, tempat di mana bensin dan udara bertemu da terbakar secara terkontrol setiap kali piston bergerak naik-turun.

Di dunia otomotif, kapasitas mesin ini biasanya dikenal sebagai cubic centimeter atau CC. Makin besar CC-nya, makin besar pula tenaga yang bisa dihasilkan. Tapi konsekuensinya? Konsumsi bensinnya juga cenderung lebih boros. Makanya penting banget pilih mobil yang kapasitas mesinnya sesuai kebutuhan. Jangan sampai “kebesaran mesin” cuma buat antar anak sekolah.

Cara Hitung Kapasitas Mesin Mobil

Secara teknis, kapasitas mesin adalah volume total ruang bakar yang bekerja bareng piston dalam satu siklus. Ukurannya bisa dalam cc, liter (l), atau cubic inch (CID).

Simpelnya: semakin besar volume ruang bakar → semakin banyak campuran udara-bensin yang bisa dihirup → tenaga lebih besar → tapi lebih boros.

Ada dua cara umum buat hitung kapasitas mesin:

1. Rumus Volume Tabung

Anggap ruang bakar itu tabung sederhana. Misal:

Jari-jari (r): 6 cm

Tinggi/Stroke (t): 8 cm

Rumus:

π × r² × t = 22/7 × (6×6) × 8 = 904,32 cc

2. Rumus Menghitung Ruang Pembakaran (Combustion Chamber)

Masih pakai konsep tabung, tapi pakai diameter bore (D) dan stroke (L).

Contoh:

Diameter (D): 12 cm → jari-jari 6 cm

Stroke (L): 8 cm

Rumus:

22/7 ÷ 4 × (12 × 12) × 8 = 904,32 cc

Hitung Berdasarkan Bore & Stroke Aktual

Ini cara yang lebih teknis dan lebih realistis karena langsung mengacu ke kerja piston.

Contoh data mesin:

Bore (D): 86 mm atau 8,6 cm

Stroke (L): 86 mm atau 8,6 cm

Hitungannya:

3,14/4 × (8,6 × 8,6) × 8,6 = 499,31 cc

Itu baru satu silinder, bro. Kalau mesinnya 4-silinder, totalnya tinggal dikali:

499,31 × 4 = 1.997,22 cc. Yup, itulah yang biasa kita kenal sebagai mesin 2.000 cc.

Kini Hitung Kapasitas Mesin Jadi Lebih Mudah

Dengan mengerti konsep ruang bakar, bore, stroke, sampai volume tabung, kamu sekarang bisa ukur sendiri kapasitas mesin mobil, atau minimal nggak bengong lagi kalau ditanya CC mesin. Jadi, apa mobilmu sesuai kebutuhanmu?