It is a common misconception that the 280ZX's L28 engine is less powerful than the L24 engine of the 1970 240Z or the L26 engine of the 260Z; the difference is due to Nissan adopting the SAE net standard of power measurement, which resulted in lower power ratings than the earlier gross figures and added emissions. However, Nissan designers deliberately sacrificed raw acceleration for improved fuel economy in the 280ZX, so the early 1979 models rated at actually had slower acceleration than the 240Z, largely due to increases in weight and taller gearing, as well as power losses to emissions controls. This overall performance deficit was not addressed until the release of the 280ZX Turbo in 1981.