The Lancia Stratos HF, widely and more simply known as Lancia Stratos, is a car made by Italian car manufacturer Lancia. The HF stands for High Fidelity. It was a very successful rally car, winning the World Rally Championship in 1974, 1975, and 1976.
A Bertone designed concept car called the Lancia Stratos Zero was shown to the public in 1970, but shares little but the name and mid-engined layout with the Stratos HF version. An new car called the New Stratos was announced in 2010 which was heavily influenced by the design of the original Stratos, but was based on a Ferrari chassis and engine.
Source: Wikipedia, 2011