Audi has made environmental improvements to the its TT while boosting performance. The new TT sees an 11-percent reduction in emissions, and up to 14 percent more power. Audi says that each TT will save around 5.5 metric tons of greenhouse gas emissions over its lifecycle. Additionally, the TT's manufacturing process has been cleaned up a bit, reducing emissions by about nine percent. Read more in the press release, below, or see Audi's lifecycle assessment here.