| A) Normally aspirated, belt drive, air-cooled, vertically opposed, fuel injected |
| B) Turbocharged, chain drive, water-cooled, horizontally opposed, carbureted |
| C) Normally aspirated, direct drive, air-cooled, horizontally opposed, fuel injected |
| D) Turbocharged, direct drive, water-cooled, horizontally opposed, carbureted |