In short, no. Only possible if you change the ECU which willl cost £££.
Even if you did higher the RPM limit, the heads internals will not be designed for that and thus you will cause damage. Then of course, the power will drop off very quick meaning your revs will be screaming, but you would most likely be going slower than if you just changed up a gear.
So yeah, don't even bother. Accept the 1.8 for the economic reliable engine that it was primarily designed for, not a high revving monster.