Tell us the VIN. It's possibly a 3.5 that's been rebadged to a 4.5 to make it sound better (or to fool unknowing insurance companies that it's not a euro model).

But the 4.5 engine was never put into a 108 or 109 chassis for Euro delivery, just NA and possibly Africa, where lower octane gas required a 4.5 with very low compression (7:1?)