Many gas hybrid run the atkinson cycle vs the otto cycle, this improves efficiency some at the expense of torque, which the electric motors make up for. Hybrid

Many gas hybrid run the atkinson cycle vs the otto cycle, this improves efficiency some at the expense of torque, which the electric motors make up for. Hybrids are much better in the city due to the stop and go nature allowing lots of braking regeneration and idle savings. On the highway much of their advantage is lost especially if comparing to say a diesel.