What do the engine type abbreviations such as L4 and V6 mean?

We use "codes" to identify different engine types, and they're not always self evident. Here are the most common codes and what they mean:

• L4 = Inline-four cylinder. This is the most common type of engine across cars at Fuelly. (Variations such as L6 or Straight-six are rare in comparison.)
• V6 = V6 engine. This one actually makes sense. The V refers to the shape of the engine. This is a very common engine. (We show the option for a V4 engine, but this engine only existed in a few rare cars.)
• H4 = Hybrid four cylinder. We use H4 and H6 to refer to four and six cylinder engines that also use electricity to help with fuel economy. Subaru also makes a "horizontal" engine that we use H4 and H6 for in Subarus only. (If you know engines, this can also be confused with H engines, another rare engine type.)
• W16 = W engine. This is another very rare engine that only exists in a few cars.

Just keep in mind that the L4 and V6 are the most frequently found engines and you'll be set. Also keep in mind that we let Fuelly members choose any engine they'd like for their vehicle. We offer suggestions but people can override them. Sometimes they get it wrong.

All FAQs