* Largest displacement (cubic centimeters or liters)? This is often the primary measure of engine size.
* Physically largest (dimensions)? This would consider the overall length, width, and height of the engine block.
* Heaviest? Weight can vary based on materials used.
Without a clear definition of "biggest," it's difficult to give a definitive answer. However, contenders for the title of largest displacement production V8 often include marine engines. These generally dwarf automotive V8s. Manufacturers like Caterpillar and MTU produce massive V8 marine diesel engines with displacements well over 1,000 cubic inches (16 liters). Precisely identifying the absolute largest requires researching current manufacturer specifications, as these can change.
Therefore, there's no single definitive answer without specifying the criteria for "biggest." Focusing on displacement, you'll find the largest production V8s are in the marine industry, exceeding typical automotive V8 sizes significantly.
