THS - Toyota Hybrid System HSD (Hybrid Synergy Drive) is just what they called THS version 2, I blieve. Most likely for marketing.
<div class='quotetop'>QUOTE(bhaynnes @ Dec 7 2006, 06:13 PM) [snapback]359087[/snapback]</div> Based on the way the competition is defining "generation", Prius is clearly on 3. And both "HSD" and "II" came about unrelated to technical achievements. Basically, the most appropriate label is "not the same".
