All Wheel Drive

I have towed extensively with AWD, and for towing I think it's great, but I much prefer part-time 4WD over AWD. It's generally more efficient, but the biggest reason is that AWD is very sensitive to different diameter tires. Thus, if you get a flat in one that cannot be repaired and your tires are more than 25% worn you often have to buy at least 2 tires and sometimes 4 depending on the vehicle specific requirements. This is a deal breaker for me after having it happen.