The 2009 Solstice GPX Coupe could be a threat for the upcoming Nissan 370Z,and that because the Solstice GPX will have approximately 300 horsepower.The 300-horsepower Ecotec turbo is probably a short-term engine, as expected interim Corporate Average Fuel Economy standards before the 2020 rule aren’t likely to be kind to such high output. (more…)