Flat 4-rotor hybrid? No, but Toyota, Subaru, and Mazda will develop a new engine together

Toyota, Mazda, and Subaru on Tuesday announced plans for joint engine development aimed at reducing emissions. The goal of the project is to achieve carbon neutrality with internal-combustion engines, allowing these engines to stay in production in a future of tighter global emissions standards, the three automakers said in a press release. One…