  In this work, a simple methodology to follow the behavior of motorized urban
vehicles, from the point of view of personal finances, is presented. Including
the acquisition of a new vehicle, the analysis considers the driving distance
per week, the average speed, the time spent at rest due to traffic conditions,
the evolution of gasoline and electric energy prices, maintenance and services,
and local taxes. Herein, two low-range compact vehicles were chosen and
compared: one powered by combustion of gasoline, and the other by electric
energy stored in batteries. Historical data and trend projections, according to
inflation and prices evolution, are taken into consideration. The developed
model may help to select adequately a new vehicle, according to the user's
needs. A good choice depends strongly on the usage and traffic conditions, the
electric vehicle being suitable for large weekly driving distances and heavy
traffic, whereas the gasoline vehicle is preferred for short distances and
light traffic. The expenses of the vehicles are compared through time, with
different scenarios envisaged according to the user's resolution to keep the
vehicle for the entire lifespan or to sell it quickly.
