[SFLA-Z]

The IMA motor and SI (spark-ignition) engine compliment each other in a hybrid car. Honda and Ferrari engines have a common characteristic: high rpm horsepower and low bottom end torque per engine displacement. You can't have it both ways, so with the IMA helping the bottom end, Honda can optimized the CR-Z valve timing for mid and high rpm performance even more than before, and the IMA eliminates the legendary Honda no bottom end torque, or 'gotta downshift' for acceleration notariety.