A recent thread got me to thinking about this: What is the smallest/biggest displacement you can think of for any given type of engine layout? It has to be considered mass-produced. I'll start:
Largest I-4: Toyota 2.7L
Smallest V6: Mazda 1.8L
Largest V8: GM 8.1L
Largest I-4: Toyota 2.7L
Smallest V6: Mazda 1.8L
Largest V8: GM 8.1L