Developing better cars that deliver major improvements in basic performance and product appeal is the fundamental principle of TNGA and our efforts to make more attractive, more eye-catching cars.
Moving forward, we will redouble our efforts to produce eye-catching designs that capture customers' hearts and to provide a driving experience that customers will want never to end.
To significantly improve basic performance, we are looking to optimize every aspect of our cars. Specifically, we are revolutionizing the development of powertrain components—such as engines, transmissions, and hybrid systems—as well as our platforms—the basic structures on which all our vehicles are built—while thoroughly enhancing functions and performance.
Our newly developed powertrain systems have yielded approximately 25% of increase in overall fuel efficiency for conventional engine systems and more than 15% of improvement in overall power output. We expect to achieve more than 15% increase in the overall fuel efficiency for our hybrid vehicle systems as well.
Toyota is coordinating the development of new powertrain systems with that of vehicle platforms and units. These developments focus on the realization of a lower center of gravity and lighter, more compact components as well as on achieving unified design through modularization—the basic principles by which all cars are built.
By applying TNGA, Toyota's focus on lowering the center of gravity of our cars is intended to improve drive and thus product appeal. For example, lowering the center of gravity of a compact car reduces side-to-side rolling, resulting in a more stable, and thus, more comfortable feel, as well as improved maneuverability.
Toyota aims to design a new model that offers the lowest center of gravity and highest maneuvering performance in its class. Through these initiatives, we are pursuing ever more eye-catching vehicles that are fun to drive and fuel efficient.
Toyota's new platforms feature innovative improvements to vehicle underbodies and suspensions. In addition to lowering the center of gravity, these improvements have dramatically increased product appeal by enabling more responsive handling, a higher-quality drive, and superior collision performance for greater safety and peace of mind. Depending on the segment, Toyota's current plans for the new body structure are for an overall increase in body rigidity of between 30% and as high as 65%.