TLDR: The BMW M30 engine is a straight-six petrol engine that was produced from 1968 to 1995. It was used in many BMW car models and is known for its durability and power.

The BMW M30 engine is a special type of engine that powers BMW cars. It is called a straight-six engine because it has six cylinders arranged in a straight line. This type of engine is known for its smoothness and power. The M30 engine was produced by BMW from 1968 to 1995, making it one of the longest-produced engines in BMW's history.

The M30 engine was used in many different BMW car models over the years. It started with the BMW 2500 and 2800 sedans in the late 1960s. The engine came in different sizes, ranging from 2.5 liters to 3.4 liters. The larger the size, the more power the engine produced. The M30 engine was known for its durability and reliability, which made it a popular choice among BMW enthusiasts.

One interesting thing about the M30 engine is that it had different versions with different features. Some versions had carburetors, which are devices that mix fuel and air for the engine to burn. Other versions had fuel injection, which is a more advanced system that delivers fuel directly into the engine. The M30 engine also had different levels of power output, depending on the specific model and year.

The M30 engine was highly regarded in the automotive industry and was even rated as one of the "Top Engines of the 20th Century" by Ward's, a respected automotive publication. It was known for its smooth power delivery, strong torque, and overall performance. The engine was also used in motorsport, powering BMW race cars to success in various competitions.

In summary, the BMW M30 engine is a straight-six petrol engine that was produced by BMW from 1968 to 1995. It was used in many BMW car models and was known for its durability, power, and smooth performance. The engine came in different sizes and versions, offering a range of power outputs. Overall, the M30 engine played a significant role in BMW's history and is still appreciated by car enthusiasts today.