While there are many factors that contribute to a vehicle's overall weight, one thing I'm concerned about is the weight of an engine. Does a larger engine mean it's always heavier, or do the number of cylinders count as well? Just to be clear on what I'm trying to say, I'll give an example.
Size = 7.0 liters
Cylinders = 8
Size = 6.0 liters
Cylinders = 12
With all other factors being equal, is it possible to determine which engine would be heavier?