What is the largest production V8 gas engine? (GM 8.1L 496 ci)

What is the smallest production V8 engine? (Ford Taurus SHO 3.8L)

What is the largest production V6 gas engine? (GM 4.3L)

What is the smallest production V6 engine? (Ford Duratec 2.5L)

What is the largest production 4-cyl engine? (GM 2.9L Colorado/Canyon)

What is the smallest production 4-cyl engine? (smallest I can think of is 1.3L in Geo Metro...I'm sure there are smaller ones in Europe/Japan)

What is the largest gas engine ever mass produced? (Viper V10 8.2L)

What is the smallest gas engine ever mass produced? (Geo Metro 1.0L 3-cyl)