Power spectra of measurements of the magnetic field strength in the heliosphere obtained by Voyager 1 between 1 AU and 9 AU have the form of a power law f-a from periods of several hours to at least 6 days. The exponent was a=2.0¿0.05 for all of the spectra considered, which is the exponent for a series of steps and for Burgers' turbulence. Spectra of large-scale speed fluctuations also have the form f-b from a period of a few hours to periods greater than 13 days in the region from 1 AU to 8.9 AU. The exponent b is generally semewhat larger than b=2, implying some ''persistence'' of the speed fluctuations. The low-frequency cutoff (outer cutoff) of the power law increases from a period of 6.5 days at 1 AU to 26 days at (6.1--8.9) AU, which can be attributed to (1) the coalescence of interaction regions and (2) a transfer of energy from the spectrum of large-scale speed fluctuations. The outer cutoff of the spectrum of speed fluctuations increases from a period of 13 days at 1 AU to 26 days between a few AU and 8.9 AU. Both the magnetic field strength fluctuations and the speed fluctuations have fractal behavior, suggesting that they are self affine rather than dominated by a few large discontinuities. ¿ American Geophysical Union 1987