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In this paper we develop the jet model of Potter & Cotter (2012) to include amagnetically dominated accelerating parabolic base transitioning to a slowlydecelerating conical jet with a geometry set by recent radio observations ofM87. We conserve relativistic energy-momentum and particle number along the jetand calculate the observed synchrotron emission from the jet by calculating theintegrated line of sight synchrotron opacity through the jet in the rest frameof each section of plasma. We calculate the inverse-Compton emission fromsynchrotron, CMB, accretion disc, starlight, broad line region, dusty torus andnarrow line region photons by transforming into the rest frame of the plasmaalong the jet.  We fit our model to simultaneous multi-wavelength observations of theCompton-dominant FSRQ type blazar PKS0227-369, with a jet geometry set by M87and an accelerating bulk Lorentz factor consistent with simulations and theory.We investigate models in which the jet comes into equipartition at differentdistances along the jet and equipartition is maintained via the conversion ofjet bulk kinetic energy into particle acceleration. We find that the jet muststill be magnetically dominated within the BLR and cannot be in equipartitiondue to the severe radiative energy losses. The model fits the observations,including radio data, very well if the jet comes into equipartition outside theBLR within the dusty torus (1.5pc) or at further distances (34pc). We find thatour fit in which the jet comes into equipartition furthest along the jet, whichhas a jet with the geometry of M87 scaled linearly with black hole mass, has aninferred black hole mass close to previous estimates. This implies that the jetof PKS0227 might be well described by the same jet geometry as M87.

Synchrotron and inverse-Compton emission from blazar jets - II. An accelerating jet model with a geometry set by observations of M87