As far as i know, 330 has a 3.0 litre engine...... Either the seller does not know what he's selling, or he's downgraded the engine, or he badged a 320 with a 330.
anyway, mudah selllers, not all of them, are sometime confused......
normally when they used this kind of terms... its meant the engine is still 3.0 but has registered as 2.2 (how they do it don ask ya) to get cheaper road tax...