PostgreSQL versus MySQL for GPS Data

Hello,

I'm currently developing a program for centralizing the vehicle fleet GPS
information -http://openggd.sourceforge.net-, written in C++.

The database should have these requirements:

- The schema for this kind of data consists of several arguments -latitude,
longitude, time, speed. etc-, none of them is a text field.
- The database also should create a table for every truck -around 100
trucks-.
- There won't be more than 86400 * 365 rows per table -one GPS position
every second along one year-.
- There won't be more than 10 simultaneously read-only queries.

The question is: Which DBMS do you think is the best for this kind of
application? PostgreSQL or MySQL?

Thanks in advance

Juan Karlos.