Toyota Lexus HS 250h featuring a more powerful engine than the Prius (a 2.4-liter gasoline engine compared to the 1.8-liter in the Prius), the Sai will look similar to the Lexus HS 250h (pictured) and will be based on the same underpinnings. Lexus has been selling the HS 250h in Japan since July and in the U.S. for a few weeks.Toyota would apply the Prius name to other hybrids in its lineup, thereby creating a Prius sub-brand, the upcoming second dedicated hybrid from the Japanese automaker bearing the Toyota name will be simply named the Toyota Sai. The Sai goes on sale in Japan on October 20th and slots in between the Prius and the Crown hybrid.
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