If it's a 2002, it might very well have a JTS. The JTS (Jet Thrust Stochiometric) engine is a very difrerent engine compared to the TS (Twin Spark). The 2.0 TS has balancing shafts, and so does the JTS. The main difference is the fuel injection though. Whereas the TS has a pretty standard injection, the JTS has a system which runs very very lean at low revs compared to the TS.
The supposedly very fuel efficient geekery inside the JTS engine cuts out at 1,500 rpm, so I'd say that a liter per 100 km (give or take) is normal for a 2-liter (both JTS and TS) driven by a lead-footed owner.
A friend of mine drives a BMW M5, and his take on fuel economy is very simple: when the tank is empty, he fills it up again. If fuel is a concern, buy something that says "JTD" on the bootlid