1. BWIA Tristar
2. Virgin Atlantic 747
3. Virgin Blue 737-800
4. SAS MD-80/90 series (no way of telling difference in pic)
5. Austrian A320
6. Germania F100
Only two completely right.
The size of the engines are different between the MD-80 and -90 Series-the reg number may also help with number 4
You did well though. 🙂